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MKSYSB
- Thread starter harpal
- Start date
Harpal
I've cut & pasted some info from some hints & tips we have at my site:
The following is a description of mksysb's four images.
+--------------------------------------------------------------------------------+
| Bosboot | Mkinsttape | Dummy TOC | rootvg |
| Image | Image | Image | data |
|---------------+------------------+----------------------+---------------------|
|<--------------- Block size 512 ---------------> | Blksz defined |
| | by the device.|
+---------------------------------------------------------+---------------------+
So, in order to get to the rootvg data we need to skip the first three images. First of all however we need to find out what block size was used to create the data back up image. This is done by the following procedure:
To obtain the blocksize of the fourth image enter:
cd /tmp
tctl -f /dev/rmt# rewind (# to be replaced by a number)
chdev -l rmt# -a block_size=512
restore -s2 -xqdvf /dev/rmt#.1 ./tapeblksz
cat ./tapeblksz
The output given will be the blocksize the tape drive was set to when the mksysb was made. We can now continue with the
actual restoration of the data:
The blocksize of the tape drive needs to be set accordingly, by entering:
chdev -l rmt# -a block_size=[number in the ./tapeblksz file]
The files or directories need to be restored by entering:
cd / (if the file is to be restored to its original place or cd /xxx/yyy if the file is to be restored somewhere else)
tctl -f /dev/rmt# rewind
restore -s4 -xqvf /dev/rmt#.1 ./dir/filename (for one file - you must include the '.' before the filename)
or
restore -s4 xqdvf /dev/rmt#.1 ./dir (for all files in the directory)
To list the files on the mksysb do:
restore -s4 -Tqvf /dev/rmt0.1
HTH
Mark
I've cut & pasted some info from some hints & tips we have at my site:
The following is a description of mksysb's four images.
+--------------------------------------------------------------------------------+
| Bosboot | Mkinsttape | Dummy TOC | rootvg |
| Image | Image | Image | data |
|---------------+------------------+----------------------+---------------------|
|<--------------- Block size 512 ---------------> | Blksz defined |
| | by the device.|
+---------------------------------------------------------+---------------------+
So, in order to get to the rootvg data we need to skip the first three images. First of all however we need to find out what block size was used to create the data back up image. This is done by the following procedure:
To obtain the blocksize of the fourth image enter:
cd /tmp
tctl -f /dev/rmt# rewind (# to be replaced by a number)
chdev -l rmt# -a block_size=512
restore -s2 -xqdvf /dev/rmt#.1 ./tapeblksz
cat ./tapeblksz
The output given will be the blocksize the tape drive was set to when the mksysb was made. We can now continue with the
actual restoration of the data:
The blocksize of the tape drive needs to be set accordingly, by entering:
chdev -l rmt# -a block_size=[number in the ./tapeblksz file]
The files or directories need to be restored by entering:
cd / (if the file is to be restored to its original place or cd /xxx/yyy if the file is to be restored somewhere else)
tctl -f /dev/rmt# rewind
restore -s4 -xqvf /dev/rmt#.1 ./dir/filename (for one file - you must include the '.' before the filename)
or
restore -s4 xqdvf /dev/rmt#.1 ./dir (for all files in the directory)
To list the files on the mksysb do:
restore -s4 -Tqvf /dev/rmt0.1
HTH
Mark
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