cdi_pr(8)cdi_pr(8)NAMEcdi_pr - issue SCSI persistent reservation commands to a tape device
SYNOPSIScdi_pr-f device [ -v ]
plus one of:
-r { k | r }
-c plus one of:
r -k key [ -A ]
i -k key [ -A ]
c -k key
p -k new -K old -t { e | E | A | w | W | a }
a -k key -K old -t { e | E | A | w | W | a }
-E -k key
-R -k key -t { e | E | A | w | W | a }
-Q
DESCRIPTION
The cdi_pr program issues various SCSI Persistent Reservation commands
to a tape device. It is mainly intended as a tools for exploring the
behavior of Persistent Reserve and should not normally be used for day-
to-day operations.
You may also specify a persistent reservation key. This key is used to
identify the host you are running on to the tape drive, and may be an 8
character text string (e.g. NetWorkr) or a text representation of a
64-bit hex number (e.g. 0x123456789abcdef0). The default reservation
key is NetWorkr. This utility will always use the "exclusive access"
type of persistent reservation.
The cdi_pr program also returns the status of the named SCSI device
(specified by the -f option).
OPERANDS-f device
Specifies the device to send the reserve request to.
Subcommands-r {r|k}
Read a drive's current reservations ( r ) or keys ( k ) using
Persistent Reserve In SCSI command.
-c r -k key [-A]
Send a Persistent Reserve Out register command, with option
APTPL bit.
-c i -k key [-A]
Send a Persistent Reserve Out register command with ignore, with
option APTPL bit.
-c c -k key
Send a Persistent Reserve Out clear key command.
-c p -k key -K oldkey -t { e | E | a | w | W | A }
Send a Persistent Reserve Out preempt command to preempt
the reservation held by key oldkey
and replace it with a reservation for key key
of type specified by t.
-a p -k key -K oldkey -t { e | E | a | w | W | A }
Send a Persistent Reserve Out preempt and abort command
to preempt the reservation held by key oldkey
and replace it with a reservation for key key
of type specified by t and abort any currently running
tape command.
-c r -k key [-A]
Send a Persistent Reserve Out Register command for key , with
optional APTPL bit.
-E -k key
Persistent Reserve Out Release command with specified key (con‐
fusing, isn't it?)
-R -k key -t { e | E | A | w | W | a }
Persistent Reserve Out Reserve command with specified
key and reservation type
-Q Query the device's Persistent Reserve capabilities. (side
effect is to clear any existing reservations and keys).
Parameters-k persistent reserve key Specifies the key you wish to use for a
persistent reservation.
-K persistent reserve key to preempt Specifies the key you wish to
preempt with this persistent reservation.
A persistent reservation key is a 64-bit value. This can hold 8
text characters or a 64-bit number. You can specify either for
this parameter. If the key entered starts with 0x
(zero x) then it is assumed to be a 64-bit number, otherwise it
will be treated as an 8 character text string. The default
value if you do not specify a key is NetWorkr.
-t reservation type Specifies the type of reservation to be made.
Allowed values are:
a
write exclusive - all registrants
A
exclusive access - all registrants
e
exclusive access - registrants only
E
exclusive access
w
write exclusive - registrants only
W
write exclusive
For information on what those all mean, please consult your
handy-dandy SCSI-3 specification, such as ANSI NCITS 351-2001
(SPC-2) or SPC-3 working draft T10/1416-D.
Options-v Run the program in verbose mode. This option will print out the
version number of the CDI library used by the program.
EXAMPLES
Sample output including drive status information:
Query different drives for their Persistent Reserve capabilitiescdi_pr-f /dev/rmt/1cbn -Q
Device /dev/rmt/1cbn (HP Ultrium 2-SCSI ):
supports Persistent Reserve but NOT Activate
Persist Through Power Loss bit
cdi_pr-f /dev/rmt/0cbn -Q
Device /dev/rmt/0cbn (HP Ultrium 1-SCSI ):
does not seem to support Persistent Reserve at all
Register from this host with the key "Solaris"cdi_pr-c r -k Solaris -f /dev/rmt/1cbn
CDI_PR command Register succeeds
Key "Solaris " was successfully registered
cdi_info.drivestat is:
status = 0, DRIVE_STATUS_READY
msg = The tape drive is ready for use
Read the keys from this drivecdi_pr-f /dev/rmt/1cbn -r k
CDI_PR command Read Keys succeeds
Read keys returns:
generation = 12
data length = 16
Keys:
"Solaris "
"Windows "
cdi_info.drivestat is:
status = 0, DRIVE_STATUS_READY
msg = The tape drive is ready for use
Reserve this drive using the previously registered key
of "Solaris" with reservation type of Exclusive
cdi_pr-f /dev/rmt/1cbn -R -k Solaris -t E
CDI_PR command Reserve succeeds
Reserve of type Exclusive Res only (3) with key "Solaris " was successful
cdi_info.drivestat is:
status = 0, DRIVE_STATUS_READY
msg = The tape drive is ready for use
Read the reservations from this rivecdi_pr-f /dev/rmt/1cbn -r r
CDI_PR command Read Reservations succeeds
Read reservations returns:
generation = 12
data length = 16
Reservations:
Key: "Solaris ", type: Exclusive Res only (3),
scope: LU, scope address: 0
cdi_info.drivestat is:
status = 0, DRIVE_STATUS_READY
msg = The tape drive is ready for use
Release the reservation of this drive that was made using
the key "Solaris" of type Exclusive
cdi_pr-f /dev/rmt/1cbn -E -k Solaris -t E
CDI_PR command Release succeeds
Release with key "Solaris " was successful
cdi_info.drivestat is:
status = 0, DRIVE_STATUS_READY
msg = The tape drive is ready for use
If the drive is reserved by another host, you should see something like this:
cdi_pr-f /dev/rmt/1cbn -r r
CDI_PR command Read Reservations succeeds
Read reservations returns:
generation = 12
data length = 16
Reservations:
Key: "Windows ", type: Exclusive Res only (3),
scope: LU, scope address: 0
cdi_info.drivestat is:
status = 0, DRIVE_STATUS_READY
msg = The tape drive is ready for use
cdi_pr-f /dev/rmt/1cbn -R -k Solaris -t E
CDI_PR command Reserve failed.
cdi_info.status = CDI_RESERVATION_ERROR (c)
cdi_info.drivestat is:
status = 0, DRIVE_STATUS_READY
msg = The tape drive is ready for use
SEE ALSOlibcdi(8), cdi_release(8), cdi_reserve(8)NetWorker 7.3.2 Aug 23, 06 cdi_pr(8)
