dad man page on OpenIndiana

Man page or keyword search:  
man Server   20441 pages
apropos Keyword Search (all sections)
Output format
OpenIndiana logo
[printable version]

dad(7D)				    Devices			       dad(7D)

NAME
       dad - driver for IDE disk devices

SYNOPSIS
       dad@ target,lun:partition

DESCRIPTION
       This driver handles the ide disk drives on SPARC platforms. The type of
       disk drive is determined using the ATA IDE identify device command  and
       by  reading the volume label stored on the drive. The dad device driver
       supports the Solaris SPARC VTOC and the EFI/GPT disk volume labels.

       The block-files access the disk using  the  system's  normal  buffering
       mechanism  and  are  read  and written without  regard to physical disk
       records. There is also a	 "raw"	interface  that	 provides  for	direct
       transmission  between  the disk and the user's read or write buffer.  A
       single read or write call usually results in one I/O operation; raw I/O
       is  therefore considerably more efficient when many bytes are transmit‐
       ted.  The names of the block files are  found  in  /dev/dsk.  Raw  file
       names are found in  /dev/rdsk.

       I/O  requests  to  the  raw  device  must  be  aligned  on  a  512-byte
       (DEV_BSIZE) boundary and must have a length that is a multiple  of  512
       bytes.  Requests	 that do not meet the restrictions cause the driver to
       return an EINVAL error. I/O requests to the block device have no align‐
       ment or length restrictions.

   Device Statistics Support
       Each  device  maintains I/O statistics both for the device and for each
       partition allocated on that  device.  For  each	device/partition,  the
       driver  accumulates  reads,  writes, bytes read, and bytes written. The
       driver also takes  hi-resolution time stamps at queue  entry  and  exit
       points,	which facilitates monitoring the residence time and cumulative
       residence-length product for each queue.

       Each device also has error statistics associated with  it.  These  must
       include	counters  for  hard  errors, soft errors and transport errors.
       Other data may be implemented as required.

FILES
       /dev/dsk/cntndnsn      block files

       /dev/rdsk/cntndnsn     raw files

       where:

       cn     controller  n

       tn     IDE target id  n (0-3)

       dn     Always 0.

       sn     partition	 n (0-7)

       The target ide numbers are assigned as:

       0    Master disk on Primary channel.

       1    Slave disk on Primary channel.

       2    Master disk on Secondary channel

       3    Slave disk on Secondary channel.

IOCTLS
       Refer to dkio(7I).

ERRORS
       EACCES	  Permission denied.

       EBUSY	  The partition was opened exclusively by another thread.

       EFAULT	  Argument was a bad address.

       EINVAL	  Invalid argument.

       EIO	   I/O error occurred.

       ENOTTY	  The device does not  support the requested ioctl function.

       ENXIO	  The device did not exist during opening.

       EROFS	  The device is a read-only device.

SEE ALSO
       format(1M), mount(1M),  lseek(2),  read(2),  write(2),  driver.conf(4),
       vfstab(4), dkio(7I)

       X3T10 ATA-4 specifications.

DIAGNOSTICS
       Command:<number>, Error:<number>, Status:<number>

	   Indicates that the command failed with an error and provides status
	   register contents. Where <number> is a hexadecimal value.

       offline

	   The driver has decided that the target disk is no longer there.

       disk ok

	   The target disk is now responding again.

       disk not responding to selection

	   The target disk is not responding.

       i/o to invalid geometry

	   The geometry of the drive could not be established.

       incomplete read/write - retrying/giving up

	   There was a residue after the command completed normally.

       no bp for disk label

	   A bp with consistent memory could not be allocated.

       no memory for disk label

	   Free memory pool exhausted.

       ATA transport failed: reason 'nnnn': {retrying|giving}

	   The host adapter has failed to transport a command  to  the	target
	   for the reason stated. The driver will either retry the command or,
	   ultimately, give up.

       no mem for property

	   Free memory pool exhausted.

       transport rejected (<n>)

	   Host adapter driver was unable to accept a command.

       Device Fault

	   Device fault - reason for such error is vendor specific.

SunOS 5.11			  24 Oct 2005			       dad(7D)
[top]

List of man pages available for OpenIndiana

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net