Note: This is not a recommended procedure. It should be used only in extreme situations and as a last step in attempting to restore data. This procedure has been used on numerous occasions with success.
First, figure out the fragment number and the block size needed.
Ex:
# ./bpmedialist -mcontents -ev D0004
media id = D0004, allocated 09/21/99 14:19:, retention level = 1
File number 1
Backup id = jeckle_0937941543
Creation date = 09/21/99 14:19:
Expiration date = 10/05/99 14:19:
Retention level = 1
Copy number = 1
Fragment number = 1
Block size (in bytes) = 32768
Then work the tape:
ficus# tpreq -ev D0004 -a r -d dlt -p NetBackup -f /tmp/mytape
This issues a tpreq for media id D0004, the " r " is for read, the " -d " is density, " -p " is pool and " -f " is mount point.
ficus# /usr/openv/volmgr/bin/vmoprcmd -d (to verify the media is mounted)
PENDING REQUESTS
<NONE>
DRIVE STATUS
Drv Type Control User Label RVSN EVSN Ready Wr.Enbl. ReqId
0 dlt TLD - No - - 1 dlt TLD root Yes D0004 D0004 Yes Yes 0
2 dlt AVR Yes D0004 Yes Yes -
ADDITIONAL DRIVE STATUS
Drv DriveName Multihost Assigned Comment
0 Drive0 No -
1 Drive1 No ficus
2 Drive2 No -
ficus#
ficus# tpconfig -d (to get the device file name for commands):
Index DriveName DrivePath Type Multihost Status
***** ********* ********** **** ********* ******
0 Drive0 /dev/rmt/0cbn dlt No UP
TLD(0) Definition DRIVE=1
1 Drive1 /dev/rmt/1cbn dlt No UP
TLD(0) Definition DRIVE=2
2 Drive2 /dev/rmt/1lbn dlt No UP
Currently defined robotics are:
TLD(0) robotic path = /dev/sg/c0t6l0, volume database host = ficus
Standalone drive volume database host = saturn
ficus# mt -f /tmp/mytape rew (goes to beginning of tape)
ficus# mt -f /tmp/mytape stat (verify at beginning of tape)
Vendor 'QUANTUM ' Product 'DLT7000 ' tape drive:
sense key(0x0)= No Additional Sense residual= 0 retries= 0
file no= 0 block no= 0
ficus# mt -f /tmp/mytape fsf (position to file #1)
ficus# mt -f /tmp/mytape stat (verify)
Vendor 'QUANTUM ' Product 'DLT7000 ' tape drive:
sense key(0x0)= No Additional Sense residual= 0 retries= 0
file no= 1 block no= 0
ficus# mt -f /tmp/mytape fsr (position to record 1)
ficus# mt -f /tmp/mytape stat (verify)
Vendor 'QUANTUM ' Product 'DLT7000 ' tape drive:
sense key(0x0)= No Additional Sense residual= 0 retries= 0
file no= 1 block no= 1
ficus# /usr/openv/netbackup/bin/tar -tvf /tmp/mytape (run tar command)
Blocksize = 2 records
Hmm, this doesn't look like a tar archive.
Skipping to next file header...
Since the tar command didn't work in the above scenario, run the stat command to see what file the
tape is positioned at:
ficus# mt -f /tmp/mytape stat
Vendor 'QUANTUM ' Product 'DLT7000 ' tape drive:
sense key(0x0)= No Additional Sense residual= 0 retries= 0
file no= 1 block no= 2
ficus# /usr/openv/netbackup/bin/tar -tvf /tmp/mytape
Blocksize = 126 records
Hmm, this doesn't look like a tar archive.
Skipping to next file header...
drwxr-xr-x root/other Jul 27 09:51 1999 /
drwxr-xr-x root/sys Jul 27 07:36 1999 /etc/
drwxrwxr-x root/sys Mar 8 14:27 1999 /etc/default/
-r--r--r-- root/sys Oct 30 16:58 1996 /etc/default/sys-suspend
-r-xr-xr-x bin/bin Mar 5 12:45 1999 /etc/default/cron
-r--r--r-- bin/bin Mar 5 12:45 1999 /etc/default/fs
-r--r--r-- root/sys Mar 5 12:45 1999 /etc/default/inetinit
-r--r--r-- root/sys Mar 5 12:45 1999 /etc/default/kbd
-r--r--r-- root/sys Mar 5 12:45 1999 /etc/default/passwd
-r--r--r-- root/sys Mar 5 12:45 1999 /etc/default/tar
To get the information off of the tape execute:
/usr/openv/netbackup/bin/tar -xvf /tmp/mytape -b <BYTESIZE/512>
In this example <BYTESIZE/512> is 32768 / 512, which equals 64.
The following will move the data from one host to another host:
Run this at the target host (client). In the below example tape_host is the server with the tape mounted.
rsh tape_host dd if=/tmp/mytape bs=<BLOCKSIZE> | /usr/openv/netbackup/bin/tar -xvf - -b <BYTESIZE/512>
In this example <BLOCKSIZE> equals 32768 and <BYTESIZE/512> equals 64.
To unmount the media run /usr/openv/volmgr/bin/tpunmount /tmp/mytape
Thanks,
Vilobh
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