Restoring from tape:
First change the block size of the tape device to 512:
# chdev -l rmt0 -a block_size=512
Check to make sure the block size of the tape drive has been changed:
# tctl -f /dev/rmt0 status
You will receive output similar to this:
rmt0 Available 09-08-00-0,0 LVD SCSI 4mm Tape Drive
attribute value description user_settable
block_size 512 BLOCK size (0=variable length) True
compress yes Use data COMPRESSION True
density_set_1 71 DENSITY setting #1 True
density_set_2 38 DENSITY setting #2 True
extfm yes Use EXTENDED file marks True
mode yes Use DEVICE BUFFERS during writes True
ret no RETENSION on tape change or reset True
ret_error no RETURN error on tape change or reset True
size_in_mb 36000 Size in Megabytes False
Change to the /tmp directory (or a directory where you would like to store the /image.data file from the mksysb image) and restore the /image.data file from the tape:
# cd /tmp
# restore -s2 -xqvf /dev/rmt0.1 ./image.data
