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tz(7)									 tz(7)

NAME
       tz, tape - SCSI magnetic tape interface

SYNOPSIS
       AlphaServer 8200 and AlphaServer 8400 DEC KZMSA:

       bus  tlsb0 at nexus?  bus tiop0 at tlsb0 vector tioperror bus isp0 at *
       vector ispintr controller scsi0 at * vector scsiintr  controller	 scsi1
       at * vector scsiintr

       AlphaServer 8200 and AlphaServer 8400 DEC KZMSA:

       bus  tlsb0  at  nexus?  bus tiop0 at tlsb0 vector tioperror bus xmi0 at
       tiop? vector xmierror bus xza0 at xmi?  controller scsi0	 at  *	vector
       scsiintr controller scsi1 at * vector scsiintr

       DEC 7000/10000 DEC KZMSA:

       bus  lsb0  at nexus?  bus iop0 at lsb0 vector ioperror bus xmi0 at iop0
       vector xmierror bus xza0 at xmi?	 controller scsi0 at * vector scsiintr
       controller scsi1 at * vector scsiintr

       DEC 4000 DEC SIOP:

       bus  ibus0 at nexus?  bus lbus0 at ibus0 bus siop0 at lbus0 slot 0 vec‐
       tor siopcointr controller scsi0 at * vector scsiintr

       DEC 3000 NCR ASC:

       bus tc0 at nexus?  bus tcds0 at * vector tcdsintr controller scsi0 at *
       vector scsiintr controller scsi1 at * vector scsiintr

       DEC 3000 DEC KZTSA:

       bus tc0 at nexus?  bus tza0 at * vector kztsaintr controller scsi0 at *
       vector scsiintr

       DEC PCI bus DEC KZPSA:

       bus pci0 at * bus pza0 at pci? vector pzaintr  controller  scsi0	 at  *
       vector scsiintr

       DEC PCI bus NCR 810:

       bus  pci0 at * bus psiop at pci? vector psiopintr controller scsi0 at *
       vector scsiintr

       DEC PCI bus Qlogic ISP1020:

       bus pci0 at * bus isp0 at * vector ispintr controller scsi0 at * vector
       scsiintr

       DEC EISA bus Adaptec 1740:

       bus  eisa0 at * bus aha0 at * vector ahaintr controller scsi0 at * vec‐
       tor scsiintr

DESCRIPTION
       The Small Computer System Interface (SCSI) tape driver provides a stan‐
       dard  tape  drive  interface  as described in mtio(7). This is the tape
       driver for any HP SCSI  tape  device.  Facilities  are  provided	 which
       enable  you to add third-party SCSI tape drives to the system. Refer to
       the ddr_config(8) and ddr.dbase(4) reference pages for instructions.

       For reads from Beginning of Media (BOM), the density  of	 the  tape  is
       obtained	 from  the  drive.  Autodensity selection is then used for all
       read operations.	 This means that reads are performed in the density of
       the tape.

       For  writes  from  BOM,	the  density,  compression, and fixed/variable
       blocking factor of the tape are set.   The tape is written in the  den‐
       sity,  compression,  and fixed/variable blocking factor selected by the
       device special file name such as tape?_d0 device special files  located
       in  dev/tape.  See the System Administration guide for more information
       on device special files. If the tape is not  at	BOM,   and  is	partly
       written,	 the  written portion of the tape determines the density, com‐
       pression, and fixed/variable blocking factors for the write.

   Tape Media and Drive Compatibility Tables
       The following table lists the tape compatibility for  CompacTape	 media
       and the TZ85, TZ86, TZ87, TZ88, TZ89, DLT4000, and DLT8000 tape drives:

       ─────────────────────────────────────────────────────────────────
       Media Type	 Drive Type
       ─────────────────────────────────────────────────────────────────
       CompacTapeI	 TZ30, TK50
       CompacTapeII	 TZ30, TK50, TK70, TZ85, TZ86
       CompacTapeIII	 TZ85, TZ86, TZ87, TZ88, TZ89, DLT4000, DLT8000
       CompacTapeIIIXT	 TZ88, TZ89, DLT4000, DLT8000
       CompacTapeIV	 TZ88, TZ89, DLT4000, DLT8000
       SuperDLT		 SuperDLT1
       ─────────────────────────────────────────────────────────────────

       CompacTapeIII  is  also	known  as  DLTtapeIII. CompacTapeIIIXT is also
       known as DLTtapeIIIxT. CompacTapeIV is also known as DLTtapeIV.

       The following table lists the tape compatibility for the TLZ04,	TLZ06,
       TLZ07, TLZ09, TLZ10, SDT-7000, SDT-9000, and SDT-10000 tape drives:

       ────────────────────────────────────────────────────────────────────
       Media Type     Drive Type
       ────────────────────────────────────────────────────────────────────
       DDS-1 (60m)    TLZ04,   TLZ06,	TLZ07,	 TLZ09,	 TLZ10,	 SDT-7000,
		      SDT-9000, SDT-10000
       DDS-1 (90m)    TLZ06,  TLZ07,  TLZ09,  TLZ10,  SDT-7000,	 SDT-9000,
		      SDT-10000
       DDS-2 (120m)   TLZ07, TLZ09, TLZ10, SDT-7000, SDT-9000, SDT-10000
       DDS-3 (125m)   TLZ10, SDT-9000, SDT-10000
       DDS-4 (150m)   SDT-10000
       ────────────────────────────────────────────────────────────────────

       The  following  table  lists  the  tape	compatibility  for  the TZS20,
       SDX-300C, and SDX-500C tape drives:

       ───────────────────────────────────────
       Media Type   Drive Type Supported
       ───────────────────────────────────────
       AIT 25	    TZS20, SDX-300C, SDX-500C
       AIT 35	    SDX-300C, SDX-500C
       AIT 50	    SDX-500C
       ───────────────────────────────────────

   Device Special Files and Tape Density
       Using a particular device special file with a certain tape format  will
       indicate what density code, compression, capacity and I/O is supported.
       It is also possible for administrators to customize which  device  spe‐
       cial  file  names  apply to what densities. Future extensions to device
       special files may also increase the number of  alternative  files  that
       can  be	used  with a particular device.	 The current range of possible
       device special files is: tape?_d0 to tape?_d7, where ?	is  a  decimal
       number representing the identification number of the tape device.  Nor‐
       mally, the _d1 suffix will always indicate  the	highest	 density  used
       with  compression,  while the _d2 suffix will indicate the highest den‐
       sity witout compression.

       Note that the tape?_??  format device names correspond to the  previous
       device names as shown in the following table:

       ────────────────────────────────────────────────────────────────────────
       Previous Format in /dev	 New Formats in /dev/tape and /dev/ntape
       ────────────────────────────────────────────────────────────────────────
       rmt?a			 tape?_d3
       rmt?l			 tape?_d0 (d0 always maps to the low density)
       rmt?m			 tape?_d2
       rmt?h			 tape?_d1 (d1 always maps to the high density)
       ────────────────────────────────────────────────────────────────────────

       Two  new	 device special file names now exist which will allow the user
       to select the highest density of the tape  drive.    These  two	device
       special	filenames  can be used for all devices which support auto-den‐
       sity select, even if there are no entries in the ddr.dbase file for the
       tape  drive.   By  selecting  this  device special filename without any
       d0-d7 reference you will be selecting a density code of 00H, which will
       instruct	 the  tape device to use the default density available for the
       tape type in the drive. Compression will be disabled for all I/O opera‐
       tions.	By  selecting  this  device special filename without any d0-d7
       reference you will be selecting a  density  code	 of  00H,  which  will
       instruct	 the  tape device to use the default density available for the
       tape type in the drive. Compression will be enabled for all I/O	opera‐
       tions.  It is important that you ensure the device supports compression
       before you use this device special filename.

       If you have a requirement to support previous  device  names  (such  as
       local  shell  scripts  or utilities), consult the System Administration
       guide for information on creating  and  using  the  rmt??   format  for
       device special files.

       As  it  is possible to customize the device names, to determine how the
       tape device special file names correspond to the supported formats  for
       a particular device, you can consult the /etc/ddr.dbase file and search
       for the device name. (See the reference page ddr.dbase(4) for  informa‐
       tion  on	 this  file) For example, the following entry appears  for the
       TZS20 tape device:

	SCSIDEVICE
	   #
	   # Matches TZS20, TZS2
	   #
	   Type = tape
	   Name = "DEC" "TZS2"
	   #
	   PARAMETERS:
	       TypeSubClass	   = 8mm, loader
	       TagQueueDepth	   = 0
	       MaxTransferSize	   = 0x0ffffff	       # (16MB - 1)
	       ReadyTimeSeconds	   = 90		       # seconds

	   DENSITY:
	       #
	       DensityNumber = 0,3,4,5,6,7
	       DensityCode = default
	       CompressionCode = 0x0
	       Buffered = 0x1

	   DENSITY:
	       #
	       DensityNumber = 1,2
	       DensityCode = default
	       CompressionCode = 0x1
	       Buffered = 0x1

       From the DENSITY section of the entry you can  determine	 which	device
       special files apply: tape?_d0, or any device name with the suffix: _d3,
       _d4, _d5, _d6, and _d7.	In this case, compression is set to Off (0x0).
       tape?_d1, or tape?_d2.  In this case, compression is set to On (0x1)

   Tape Format Reference
       The  following  tables provide information for various tape drives. All
       of these tape drives support variable block  size.  Note	 that  in  the
       capacity	 column,  a  number  followed by an asterisk (*) assumes a 2:1
       compression ratio.  The actual compression ratio may vary depending  on
       the  type  of  data being compressed.  Note the following abbreviations
       that apply to these tables: CompacTape, such as CompacTapeIII Read  and
       write I/O is supported Read only I/O is supported

       TZ85 Tape Drive Supported Formats

       ──────────────────────────────────────────────────────────────────────
       Format	Device	     Density	Compres‐   Capacity   Car‐	 I/O
		Special	     Code	sion	   (GB)	      tridge
		File Name
       ──────────────────────────────────────────────────────────────────────
       TK50	tape?_d0-7   00h	N/A	   95M	      CT II	 ro
       TZ30	tape?_d0-7   00h	N/A	   95M	      CT II	 ro
       TZ85	tape?_d0-7   17h	N/A	   2.6	      CT III	 rw
       ──────────────────────────────────────────────────────────────────────

       TZ86 Tape Drive Supported Formats

       ─────────────────────────────────────────────────────────────────────────
       For‐    Device	Spe‐	Density	   Compres‐   Capacity	 Car‐	    I/O
       mat     cial	File	Code	   sion	      (GB)	 tridge
	       Name
       ─────────────────────────────────────────────────────────────────────────
       TK50    tape?_d0-7	00h	   N/A	      95M	 CT II	    ro
       TZ30    tape?_d0-7	00h	   N/A	      95M	 CT II	    ro
       TZ85    tape?_d0,3	17h	   N/A	      2.6	 CT III	    rw
       TZ86    tape?_d1,2,4-7	18h	   N/A	      6.0	 CT III	    rw
       ─────────────────────────────────────────────────────────────────────────

       TZ87 Tape Drive Supported Formats

       ──────────────────────────────────────────────────────────────────────
       Format	Device	     Density	Compres‐   Capacity   Car‐	 I/O
		Special	     Code	sion	   (GB)	      tridge
		File Name
       ──────────────────────────────────────────────────────────────────────
       TZ85	tape?_d3     17h	N/A	   2.6	      CT III	 rw
       TZ86	tape?_d0     18h	N/A	   6.0	      CT III	 rw
       TZ87	tape?_d2,    00h	off	   10.0	      CT III	 rw
		4-7
       TZ87	tape?_d1     00h	on	   20.0 *     CT III	 rw
       ──────────────────────────────────────────────────────────────────────

       TZ88 / DLT4000 Tape Drive Supported Formats

       ───────────────────────────────────────────────────────────────────────
       Format	 Device	      Density	 Compres‐   Capacity   Car‐	  I/O
		 Special      Code	 sion	    (GB)       tridge
		 File Name
       ───────────────────────────────────────────────────────────────────────
       TZ85	 tape?_d3     17h	 N/A	    2.6	       CT III	  rw
       TZ86	 tape?_d0     18h	 N/A	    6.0	       CT III	  rw
       TZ87	 tape?_d2,    00h	 off	    10.0       CT III	  rw
		 6-7
       TZ87	 tape?_d1     00h	 on	    20.0 *     CT III	  rw
       TZ87	 tape?_d4     19h	 off	    15.0       CT III	  rw
       TZ87	 tape?_d5     19h	 on	    30.0 *     CT III	  rw
       TZ88	 tape?_d4,    N/A	 N/A	    15/30      CT   III	  ro
		 5					       XT
       TZ88	 tape?_d2,    00h	 off	    15.0       CT   III	  rw
		 6-7					       XT
       TZ88	 tape?_d1     00h	 on	    30.0 *     CT   III	  rw
							       XT
       DLT4000	 tape?_d4,    N/A	 N/A	    15/30      CT   III	  ro
		 5					       XT
       DLT4000	 tape?_d2,    00h	 off	    15.0       CT   III	  rw
		 6-7					       XT
       DLT4000	 tape?_d1     00h	 on	    30.0 *     CT   III	  rw
							       XT
       TZ88	 tape?_d4,    N/A	 N/A	    20/40      CT IV	  ro
		 5
       TZ88	 tape?_d2,    00h	 off	    20.0       CT IV	  rw
		 6-7
       TZ88	 tape?_d1     00h	 on	    40.0 *     CT IV	  rw
       DLT4000	 tape?_d4,    N/A	 N/A	    20/40      CT IV	  ro
		 5
       DLT4000	 tape?_d2,    00h	 off	    20.0       CT IV	  rw
		 6-7
       DLT4000	 tape?_d1     00h	 on	    40.0 *     CT IV	  rw
       ───────────────────────────────────────────────────────────────────────

       The DLT4000 is functionally equivalent to the TZ88 tape drive  and  the
       DLT4000 tape format is identical to the TZ88 tape format.

       TZ89 Tape Drive Supported Formats

       ─────────────────────────────────────────────────────────────────────────
       Format	 Device	 Spe‐	Density	   Compres‐   Capacity	 Car‐	    I/O
		 cial	 File	Code	   sion	      (GB)	 tridge
		 Name
       ─────────────────────────────────────────────────────────────────────────
       TZ85	 tape?_d0,3	N/A	   N/A	      2.6	 CT III	    ro
       TZ85	 tape?_d4	17h	   N/A	      2.6	 CT III	    rw
       TZ86	 tape?_d0,3	N/A	   N/A	      6.0	 CT III	    ro
       TZ86	 tape?_d5	18h	   N/A	      6.0	 CT III	    rw
       TZ87	 tape?_d0,3	N/A	   N/A	      10/20	 CT III	    ro
       TZ87	 tape?_d2,6-7	00h	   off	      10.0	 CT III	    rw
       TZ87	 tape?_d1	00h	   on	      20.0 *	 CT III	    rw
       TZ88	 tape?_d0,3-5	N/A	   N/A	      15/30	 CT IIIXT   ro
       DLT4000	 tape?_d0,3-5	N/A	   N/A	      15/30	 CT IIIXT   ro
       TZ88	 tape?_d2,6-7	00h	   off	      15.0	 CT IIIXT   rw
       TZ88	 tape?_d1	00h	   on	      30.0 *	 CT IIIXT   rw
       DLT4000	 tape?_d2,6-7	00h	   off	      15.0	 CT IIIXT   rw
       DLT4000	 tape?_d1	00h	   on	      30.0 *	 CT IIIXT   rw
       TZ88	 tape?_d3	1ah	   off	      20.0	 CT IV	    rw
       TZ88	 tape?_d0	1ah	   on	      40.0 *	 CT IV	    rw
       DLT4000	 tape?_d3	1ah	   off	      20.0	 CT IV	    rw
       DLT4000	 tape?_d0	1ah	   on	      40.0 *	 CT IV	    rw
       TZ89	 tape?_d4,5	N/A	   N/A	      20-70	 CT IV	    ro
       TZ89	 tape?_d2,6-7	00h	   off	      35.0	 CT IV	    rw
       TZ89	 tape?_d1	00h	   on	      70.0 *	 CT IV	    rw
       ─────────────────────────────────────────────────────────────────────────

       DLT8000 Tape Drive Supported Formats

       ─────────────────────────────────────────────────────────────────────────
       Format	 Device	 Spe‐	Density	   Compres‐   Capacity	 Car‐	    I/O
		 cial	 File	Code	   sion	      (GB)	 tridge
		 Name
       ─────────────────────────────────────────────────────────────────────────
       TZ87	 tape?_d0,	N/A	   N/A	      10/20	 CT III	    ro
		 3-5
       TZ87	 tape?_d2,6-7	00h	   off	      10.0	 CT III	    rw
       TZ87	 tape?_d1	00h	   on	      20.0 *	 CT III	    rw
       TZ88	 tape?_d0,3-5	N/A	   N/A	      15/30	 CT IIIXT   ro
       DLT4000	 tape?_d0,3-5	N/A	   N/A	      15/30	 CT IIIXT   ro
       TZ88	 tape?_d2,6-7	00h	   off	      15.0	 CT IIIXT   rw
       TZ88	 tape?_d1	00h	   on	      30.0 *	 CT IIIXT   rw
       DLT4000	 tape?_d2,6-7	00h	   off	      15.0	 CT IIIXT   rw
       DLT4000	 tape?_d1	00h	   on	      30.0 *	 CT IIIXT   rw
       TZ88	 tape?_d4	1ah	   off	      20.0	 CT IV	    rw
       TZ88	 tape?_d5	1ah	   on	      40.0 *	 CT IV	    rw
       DLT4000	 tape?_d4	1ah	   off	      20.0	 CT IV	    rw
       DLT4000	 tape?_d5	1ah	   on	      40.0 *	 CT IV	    rw
       TZ89	 tape?_d3	1bh	   off	      35.0	 CT IV	    rw
       TZ89	 tape?_d0	1bh	   on	      70.0 *	 CT IV	    rw
       DLT8000	 tape?_d2,6-7	00h	   off	      40.0	 CT IV	    rw
       DLT8000	 tape?_d1	00h	   on	      80.0 *	 CT IV	    rw
       ─────────────────────────────────────────────────────────────────────────

       The DLT2000 format is also known as the TZ87 format. The DLT4000 format
       is  also	 known as the TZ88 format. The DLT7000 format is also known as
       the TZ89 format.

       SuperDLT Tape Drive Supported Formats

       ───────────────────────────────────────────────────────────────────────────────────
       Format	   Device		  Density    Compres‐	Capacity   Car‐	      I/O
		   Special		  Code	     sion	(GB)	   tridge
		   File Name
       ───────────────────────────────────────────────────────────────────────────────────
       SuperDLT1   tape?_d0,_d2,_d4,_d6	  00(0x48)   off	110	   SDLT	      rw
       SuperDLT1   tape?_d1,_d3,_d5,_d7	  00(0x48)   on		220	   SDLT	      rw
       DLT8000	   N/A			  0x41	     N/A	40/80	   CT IV      ro
       DLT7000	   N/A			  0x1b	     N/A	35/70	   CT IV      ro
       DLT4000	   N/A			  0x1a	     N/A	20/40	   CT IV      ro
       ───────────────────────────────────────────────────────────────────────────────────

       TZ30 Tape Drive Supported Formats

       ────────────────────────────────────────────────────────────────────────
       Format	Device	Spe‐   Density	  Compres‐   Capacity	Car‐	   I/O
		cial	File   Code	  sion	     (MB)	tridge
		Name
       ────────────────────────────────────────────────────────────────────────
       TZ30	tape?d0-d7     00h	  N/A	     95		CT 1	   rw
       ────────────────────────────────────────────────────────────────────────

       TKZ08 Tape Drive Supported Formats

       ───────────────────────────────────────────────────────────────────────
       Format	 Device	      Density	 Compres‐   Capacity   Car‐	  I/O
		 Special      Code	 sion	    (GB)       tridge
		 File Name
       ───────────────────────────────────────────────────────────────────────
       TKZ08	 tape?d0-d7   14h	 N/A	    2.2	       8 mm	  rw
       (Also
       known
       as
       Exabyte
       8200.)
       ───────────────────────────────────────────────────────────────────────

       TKZ09 Tape Drive Supported Formats

       ─────────────────────────────────────────────────────────────────────────
       Format	 Device		Density	   Compres‐   Capacity	 Car‐	    I/O
		 Special	Code	   sion	      (GB)	 tridge
		 File Name
       ─────────────────────────────────────────────────────────────────────────
       TKZ08	 tape?_d0,d3	14h	   N/A	      ?		 8mm	    rw
       TKZ09	 tape?_d1,d2,	15h	   N/A	      ?		 8mm	    rw
       (Also	 d4-7
       known
       as
       Exabyte
       8500.
       Sup‐
       ports
       Exabyte
       8200
       and
       8500
       for‐
       mats)
       ─────────────────────────────────────────────────────────────────────────

       TSZ07 Tape Drive Supported Formats

       ──────────────────────────────────────────────────────────────────────
       Format	Device	     Density	Compres‐   Capacity   Car‐	 I/O
		Special	     Code	sion	   (BPI)      tridge
		File Name
       ──────────────────────────────────────────────────────────────────────
       TSZ07	tape?d0,     02h	N/A	   1600	      9-Trk	 rw
		d2
       TSZ07	tape?d1,     03h	N/A	   6250	      9-Trk	 rw
		d3-7
       ──────────────────────────────────────────────────────────────────────

       TZK20 Tape Drive Supported Formats

       ───────────────────────────────────────────────────────────────────────
       Format	Device Spe‐   Density	 Compres‐   Capacity   Car‐	  I/O
		cial   File   Code	 sion	    (GB)       tridge
		Name
       ───────────────────────────────────────────────────────────────────────
       TZK20	tape?d0-d7    00h	 N/A	    2.3	       QICW	  rw
       ───────────────────────────────────────────────────────────────────────

       TLZ04 Tape Drive Supported Formats

       ──────────────────────────────────────────────────────────────────────
       Format	Device	     Density	Compres‐   Capacity   Car‐	 I/O
		Special	     Code	sion	   (GB)	      tridge
		File Name
       ──────────────────────────────────────────────────────────────────────
       TLZ04	tape?_d0-7   13h	N/A	   1.3 GB     DDS-1	 rw
							      (60m)
       ──────────────────────────────────────────────────────────────────────

       TLZ06 Tape Drive Supported Formats

       ───────────────────────────────────────────────────────────────────────
       Format	Device Spe‐   Density	 Compres‐   Capacity   Car‐	  I/O
		cial   File   Code	 sion	    (GB)       tridge
		Name
       ───────────────────────────────────────────────────────────────────────
       TLZ04	tape?_d0,     13h	 N/A	    1.3 GB     DDS-1	  rw
		3-7					       (60m)
       TLZ06	tape?_d0,     13h	 off	    1.3 GB     DDS-1	  rw
		3-7					       (60m)
       TLZ06	tape?_d1-2    13h	 on	    2.6 GB *   DDS-1	  rw
							       (60m)
       TLZ06	tape?_d0,     13h	 off	    2.0 GB     DDS-1	  rw
		3-7					       (90m)
       TLZ06	tape?_d1-2    13h	 on	    4.0 GB *   DDS-1	  rw
							       (90m)
       ───────────────────────────────────────────────────────────────────────

       TLZ07 Tape Drive Supported Formats

       ───────────────────────────────────────────────────────────────────────
       Format	Device Spe‐   Density	 Compres‐   Capacity   Car‐	  I/O
		cial   File   Code	 sion	    (GB)       tridge
		Name
       ───────────────────────────────────────────────────────────────────────
       TLZ04	tape?_d0,     00h	 N/A	    1.3 GB     DDS-1	  rw
		3-7					       (60m)
       TLZ06	tape?_d0,     00h	 off	    1.3 GB     DDS-1	  rw
		3-7					       (60m)
       TLZ06	tape?_d1-2    00h	 on	    2.6 GB *   DDS-1	  rw
							       (60m)
       TLZ06	tape?_d0,     00h	 off	    2.0 GB     DDS-1	  rw
		3-7					       (90m)
       TLZ06	tape?_d1-2    00h	 on	    4.0 GB *   DDS-1	  rw
							       (90m)
       TLZ07	tape?_d0,     00h	 off	    4.0 GB     DDS-2	  rw
		3-7					       (120m)
       TLZ07	tape?_d1-2    00h	 on	    8.0 GB *   DDS-2	  rw
							       (120m)
       ───────────────────────────────────────────────────────────────────────

       TLZ09 / SDT-7000 Tape Drive Supported Formats

       ─────────────────────────────────────────────────────────────────────────────
       Format	  Device  Spe‐	 Density    Compres‐   Capacity	  Car‐		I/O
		  cial	  File	 Code	    sion       (GB)	  tridge
		  Name
       ─────────────────────────────────────────────────────────────────────────────
       TLZ04	  tape?_d0,	 00h	    N/A	       1.3	  DDS-1		rw
		  3-7						  (60m)
       TLZ06	  tape?_d0,	 00h	    off	       1.3	  DDS-1		rw
		  3-7						  (60m)
       TLZ06	  tape?_d1-2	 00h	    on	       2.6 *	  DDS-1		rw
								  (60m)
       TLZ06	  tape?_d0,	 00h	    off	       2.0	  DDS-1		rw
		  3-7						  (90m)
       TLZ06	  tape?_d1-2	 00h	    on	       4.0 *	  DDS-1		rw
								  (90m)
       TLZ07	  tape?_d0,3-7	 00h	    off	       4.0	  DDS-2		rw
								  (120m)
       TLZ07	  tape?_d1-2	 00h	    on	       8.0 *	  DDS-2(120m)	rw
       TLZ09	  tape?_d0,3-7	 00h	    off	       4.0	  DDS-2 (120)	rw
       TLZ09	  tape?_d1-2	 00h	    on	       8.0 *	  DDS-2 (120)	rw
       SDT-7000	  tape?_d0,3-7	 00h	    off	       4.0	  DDS-2		rw
								  (120m)
       SDT-7000	  tape?_d1-2	 00h	    on	       8.0 *	  DDS-2		rw
								  (120m)
       ─────────────────────────────────────────────────────────────────────────────

       The SDT-7000 is functionally equivalent to the TLZ09 tape drive and the
       SDT-7000 tape format is identical to the TLZ09 tape format.

       TLZ10 / SDT-9000 Tape Drive Supported Formats

       ──────────────────────────────────────────────────────────────────────────
       Format	  Device  Spe‐	 Density    Compres‐   Capacity	  Car‐	     I/O
		  cial	  File	 Code	    sion       (GB)	  tridge
		  Name
       ──────────────────────────────────────────────────────────────────────────
       TLZ04	  tape?_d0,3-7	 00h	    N/A	       1.3	  DDS-1	     rw
								  (60m)
       TLZ06	  tape?_d0,3-7	 00h	    off	       1.3	  DDS-1	     rw
								  (60m)

       TLZ06	  tape?_d1-2	 00h	    on	       2.6 *	  DDS-1	     rw
								  (60m)
       TLZ06	  tape?_d0,3-7	 00h	    off	       2.0	  DDS-1	     rw
								  (90m)
       TLZ06	  tape?_d1-2	 00h	    on	       4.0 *	  DDS-1	     rw
								  (90m)
       TLZ07	  tape?_d0,3-7	 00h	    off	       4.0	  DDS-2	     rw
								  (120m)
       TLZ07	  tape?_d1-2	 00h	    on	       8.0 *	  DDS-2	     rw
								  (120m)
       TLZ09	  tape?_d0,3-7	 00h	    off	       4.0	  DDS-2	     rw
								  (120m)
       TLZ09	  tape?_d1-2	 00h	    on	       8.0 *	  DDS-2	     rw
								  (120m)
       SDT-7000	  tape?_d0,3-7	 00h	    off	       4.0	  DDS-2	     rw
								  (120m)
       SDT-7000	  tape?_d1-2	 00h	    on	       8.0 *	  DDS-2	     rw
								  (120m)
       TLZ10	  tape?_d0,3-7	 00h	    off	       12.0	  DDS-3	     rw
								  (125m)
       TLZ10	  tape?_d1-2	 00h	    on	       24.0 *	  DDS-3	     rw
								  (125m)
       SDT-9000	  tape?_d0,3-7	 00h	    off	       12.0	  DDS-3	     rw
								  (125m)
       SDT-9000	  tape?_d1-2	 00h	    on	       24.0 *	  DDS-3	     rw
								  (125m)
       ──────────────────────────────────────────────────────────────────────────

       The SDT-9000 is functionally equivalent to the TLZ10 tape drive and the
       SDT-9000 tape format is identical to the TLZ10 tape format.

       SDT-10000 Tape Drive Supported Formats

       ───────────────────────────────────────────────────────────────────────────
       For‐	   Device  Spe‐	  Density    Compres‐	Capacity   Car‐	      I/O
       mat	   cial	   File	  Code	     sion	(GB)	   tridge
		   Name
       ───────────────────────────────────────────────────────────────────────────
       TLZ04	   tape?_d0,3-7	  00h	     N/A	1.3	   DDS-1      rw
								   (60m)
       TLZ06	   tape?_d0,3-7	  00h	     off	1.3	   DDS-1      rw
								   (60m)
       TLZ06	   tape?_d1-2	  00h	     on		2.6 *	   DDS-1      rw
								   (60m)
       TLZ06	   tape?_d0,3-7	  00h	     off	2.0	   DDS-1      rw
								   (90m)
       TLZ06	   tape?_d1-2	  00h	     on		4.0 *	   DDS-1      rw
								   (90m)
       TLZ07	   tape?_d0,3-7	  00h	     off	4.0	   DDS-2      rw
								   (120m)
       TLZ07	   tape?_d1-2	  00h	     on		8.0 *	   DDS-2      rw
								   (120m)
       TLZ09	   tape?_d0,3-7	  00h	     off	4.0	   DDS-2      rw
								   (120m)
       TLZ09	   tape?_d1-2	  00h	     on		8.0 *	   DDS-2      rw
								   (120m)
       SDT-7000	   tape?_d0,3-7	  00h	     off	4.0	   DDS-2      rw
								   (120m)
       SDT-7000	   tape?_d1-2	  00h	     on		8.0 *	   DDS-2      rw
								   (120m)
       TLZ10	   tape?_d0,3-7	  00h	     off	12.0	   DDS-3      rw
								   (125m)
       TLZ10	   tape?_d1-2	  00h	     on		24.0 *	   DDS-3      rw
								   (125m)
       SDT-9000	   tape?_d0,3-7	  00h	     off	12.0	   DDS-3      rw
								   (125m)
       SDT-9000	   tape?_d1-2	  00h	     on		24.0 *	   DDS-3      rw
								   (125m)
       SDT-10000   tape?_d0,3-7	  00h	     off	20.0	   DDS-4      rw
								   (150m)
       SDT-10000   tape?_d1-2	  00h	     on		40.0 *	   DDS-4      rw
								   (150m)
       ───────────────────────────────────────────────────────────────────────────

       TZS20 Tape Drive Supported Formats

       ──────────────────────────────────────────────────────────────────────
       Format	Device	     Density	Compres‐   Capacity   Car‐	 I/O
		Special	     Code	sion	   (GB)	      tridge
		File Name
       ──────────────────────────────────────────────────────────────────────
       TZS20	tape?_d0,    00h	off	   25.0 GB    AIT	 rw
		3-7

       TZS20	tape?_d1-2   00h	on	   50.0	 GB   AIT	 rw
						   *
       ──────────────────────────────────────────────────────────────────────

       SDX-300C Tape Drive Supported Formats

       ─────────────────────────────────────────────────────────────────────────
       Format	  Device Spe‐	Density	   Compres‐   Capacity	 Car‐	    I/O
		  cial	 File	Code	   sion	      (GB)	 tridge
		  Name
       ─────────────────────────────────────────────────────────────────────────
       TZS20	  tape?_d0,	00h	   off	      25.0	 AIT 25	    rw
		  3-7
       TZS20	  tape?_d1-2	00h	   on	      50.0 *	 AIT 25	    rw
       SDX-300C	  tape?_d0,	00h	   off	      25.0	 AIT 25	    rw
		  3-7
       SDX-300C	  tape?_d1-2	00h	   on	      50.0 *	 AIT 25	    rw
       SDX-300C	  tape?_d0,	00h	   off	      35.0	 AIT 35	    rw
		  3-7
       SDX-300C	  tape?_d1-2	00h	   on	      70.0 *	 AIT 35	    rw
       ─────────────────────────────────────────────────────────────────────────

       The SDX-300C format is also known as the TZS20 format.

       SDX-500C Tape Drive Supported Formats

       ──────────────────────────────────────────────────────────────────────────
       Format	  Device  Spe‐	 Density    Compres‐   Capacity	  Car‐	     I/O
		  cial	  File	 Code	    sion       (GB)	  tridge
		  Name
       ──────────────────────────────────────────────────────────────────────────
       TZS20	  tape?_d0,	 00h	    off	       25.0	  AIT 25     rw
		  3-7
       TZS20	  tape?_d1-2	 00h	    on	       50.0 *	  AIT 25     rw
       SDX-300C	  tape?_d0,	 00h	    off	       25.0	  AIT 25     rw
		  3-7
       SDX-300C	  tape?_d1-2	 00h	    on	       50.0 *	  AIT 25     rw
       SDX-300C	  tape?_d0,	 00h	    off	       35.0	  AIT 35     rw
		  3-7
       SDX-300C	  tape?_d1-2	 00h	    on	       70.0 *	  AIT 35     rw
       SDX-500C	  tape?_d0,	 00h	    off	       50.0	  AIT 50     rw
		  3-7
       SDX-500C	  tape?_d1-2	 00h	    on	       100.0 *	  AIT 50     rw
       ──────────────────────────────────────────────────────────────────────────

       The SDX-300C format is also known as the TZS20 format.

       The following formats are  supported  for  the  TZK10  QIC-format  tape
       drive:  QIC-24  (re)  512-byte  block  size;  QIC-120  and QIC-150 (rw)
       512-byte block size; and QIC-320 (rw) variable block size.   With  QIC-
       format tapes, except QIC-320 and QIC-525, all read and write operations
       must be in multiples of the block size because  record  boundaries  are
       not preserved. Use the following device special File Name file names to
       select QIC densities:

       ──────────────────────────────────────────────────────────────────
       Format	 Device	  Spe‐	 Block Size   Capacity	 Cartridge   I/O
		 cial	  File
		 Name
       ──────────────────────────────────────────────────────────────────
       QIC-24	 tape?_d3	 fixed 512    60MB	 DC600A	     ro
       QIC-120	 tape?_d0	 fixed 512    120MB	 DC6150	     rw
       QIC-120	 tape?_d0	 fixed 512    120MB	 DC600XTD,   rw
       QIC-150	 tape?_d2, 4	 fixed 512    150MB	 DC6150	     rw
       QIC-150	 tape?_d2, 4	 fixed 512    150MB	 DC600XTD    rw
       QIC-320	 tape?_d5,6	 fixed 1024   320MB	 DC6320	     rw
       QIC-525	 tape?_d5,6	 fixed 1024   525MB	 DC6525	     rw
       QIC-320	 tape?_d1,7	 variable     320MB	 DC6320	     rw
       QIC-525	 tape?_d1,7	 variable     525MB	 DC6525	     rw
       ──────────────────────────────────────────────────────────────────

       The following formats are  supported  for  the  TZK11  QIC-format  tape
       drive: QIC-24 (read only) 512-byte block size; QIC-120 and QIC-150 (rw)
       512-byte block size;  and  QIC-320/525/1Gig/2Gig	 (rw)  variable	 block
       size.   With QIC-format 24/120/150 tapes, all read and write operations
       must be in multiples of the block size because  record  boundaries  are
       not  preserved.	 Use the following device special file names to select
       QIC densities:

       ────────────────────────────────────────────────────────────────
       Format	 Device Spe‐   Block Size   Capacity   Cartridge   I/O
		 cial	File
		 Name
       ────────────────────────────────────────────────────────────────
       QIC-24	 tape?_d3,4    fixed 512    60MB       DC600A	   ro
       QIC-120	 tape?_d0      fixed 512    120MB      DC6150	   rw
       QIC-120	 tape?_d0      fixed 512    120MB      DC600XTD	   rw
       QIC-150	 tape?_d2      fixed 512    150MB      DC6150	   rw

       QIC-150	 tape?_d2      fixed 512    150MB      DC600XTD	   rw
       QIC-320	 tape?_d1      variable	    320MB      DC6320	   rw
       QIC-525	 tape?_d1      variable	    525MB      DC6525	   rw
       QIC-1G	 tape?_d1      variable	    1G	       DC9000	   rw
       QIC-2G	 tape?_d1      variable	    2G	       DC9000	   rw
       QIC-320	 tape?_d5,6    fixed 1024   320MB      DC6320	   rw
       QIC-525	 tape?_d5,6    fixed 1024   525MB      DC6525	   rw
       ────────────────────────────────────────────────────────────────

       The TZK11 tape drive uses autodensity  select  feature  of  the	drive.
       The  2 Gig density can only be written on a 2 Gig cartridge.  The 1 Gig
       density can only be written on a 1 Gig  cartridge.   The	 320/525  car‐
       tridge can be used to write 120/150/320/525 densities.

       With  all  fixed-block  tape  devices,  when  you use the dd command to
       transfer a file to tape you must use padding to	complete  a  block  by
       specifying  the	conv=sync  option.   For example, the following two dd
       commands use the conv=sync option to transfer the /etc/motd file with a
       size of approximately 400 bytes to the QIC-format tape drives:

       dd  if=/etc/motd of=/dev/tape/tape0_d2 bs=10k conv=sync dd if=/etc/motd
       of=dev/tape/tape0_d0 bs=512 conv=sync

       The data field of 1 also tells the driver not to continue scanning LUNs
       for this target when this attribute is found.

   Tape Support
       Refer  to the Software Product Description (SPD) for information on the
       specific tape devices that are supported.  Refer	 to  the  Systems  and
       Options Catalog (SOC) for information on which devices are supported on
       the various system platforms.

ERRORS
       All diagnostic messages are sent to the error logger subsystem.

EXAMPLES
       The following example shows the configuration  specification  that  you
       might  have  for a DEC 3000 Model 500 system with a PMAZC controller in
       slot 0 and KZTSA devices in slots 1 and 2:

       bus tc0 at nexus?  bus tcds0 at tc0 slot 6  vector  tcdsintr	     #
       onboard scsi bus tcds1 at tc0 slot 0 vector tcdsintr	    # PMAZC in
       tc slot 0 bus tza0 at tc0 slot 1 vector kztsaintr	 # KZTSA in tc
       slot  1	bus  tza1 at tc0 slot 2 vector kztsaintr	 # KZTSA in tc
       slot 2 controller scsi0 at tcds0 slot 0 vector scsiintr # Internal port
       controller  scsi1  at tcds0 slot 1 vector scsiintr # External port con‐
       troller scsi2 at tcds1 slot 0 vector scsiintr # A port controller scsi3
       at  tcds1 slot 1 vector scsiintr # B port controller scsi4 at tza0 slot
       0 vector scsiintr controller scsi5 at tza1 slot 0 vector scsiintr

FILES
       /dev/tape/tape?_d?

       /dev/ntape/tape?_d?

SEE ALSO
       ddr.dbase(4), ddr_config(8),  mtio(7),  RAID(7),	 SCSI(7),  MAKEDEV(8),
       uerf(8), tapex(8)

									 tz(7)
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