samar 5# /usr/local/sbin/amrestore -r /dev/sdlt2
amrestore:   0: skipping start of tape: date 20050107 label SAMAR05
amrestore:   1: restoring samar._usr5_amanda.20050107.1
amrestore: read error: I/O error

samar 6# mt -f /dev/sdlt2 rewind
samar 7# mt -f /dev/sdlt2 fsf 1
samar 8# dd if=/dev/sdlt2 bs=32768 of=samar._usr5_amanda.20050107.1 skip=1
Read error: I/O error
1+0 records in
1+0 records out

samar 9# mt -f /dev/sdlt2 rewind
samar 10# mt -f /dev/sdlt2 fsf 1
samar 11# dd if=/dev/sdlt2 bs=32768 of=samar._usr5_amanda.20050107.1 
Read error: I/O error
1+0 records in
1+0 records out

samar 12# mt -f /dev/sdlt2 rewind
samar 13# mt -f /dev/sdlt2 fsf 1
samar 14# cat -evt /dev/sdlt2 | more
Input error: Invalid argument (/dev/sdlt2)

samar 15# mt -f /dev/sdlt2 rewind
samar 16# mt -f /dev/sdlt2 fsf 1
samar 17# dd if=/dev/sdlt2 bs=32768| cat -evt | more
AMANDA: FILE 20050107 samar /usr5/amanda lev 1 comp .gz program /usr/local/sbin/
gnutar$
To restore, position tape at start of file and run:$
^Idd if=<tape> bs=32k skip=1 | /usr/sbin/gzip -dc | usr/local/sbin/gnutar -f... 
-$
^L$
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@


 ** many null characters removed.



samar 18# mt -f /dev/sdlt2 rewind
samar 19# mt -f /dev/sdlt2 fsf 1
samar 23# dd if=/dev/sdlt2 bs=32768 skip=1 | /usr/sbin/gzip -dc | 
/usr/local/sbin/gnutar -tf - | more
Read error: I/O error
0+0 records in
0+0 records out

gzip: stdin: unexpected end of file


I had followed Gene's instructions and saved the label via DD and
restored it to the tape as shown in an earlier email. This was the
procedure to set the blksize in the tape and dd the label back.

samar 24# mt -f /dev/sdlt2 blksize

 Recommended tape I/O size: 131072 bytes (256 512-byte blocks)
 Minimum block size: 4 byte(s)
 Maximum block size: 16777212 bytes
 Current block size: Variable

I am using /dev/sdlt2 link to /dev/rmt/tps1d4nrns - no rewind, non-byte swap
device. I am no longer using the trailing 'v' device which would normally
provide variable length blocks.

I will demonstrate with the next tape SAMAR06 in slot 5.

samar 27# mt -f /dev/sdlt2 rewind
samar 28# dd if=/dev/sdlt2 of=./scratch
Read error: Invalid argument
0+0 records in
0+0 records out

Remembering that I'd setblksize yesterday prior to running amlabel -f

samar 29# dd if=/dev/sdlt2 of=./scratch bs=32k
1+0 records in
1+0 records out

samar 30# ls -las scratch
  64 -rw-r--r--    1 root     sys        32768 Jan  7 15:36 scratch

AMANDA: TAPESTART DATE X TAPE SAMAR06$
^L$
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@

 ** many nulls removed


samar 32# mt -f /dev/sdlt2 blksize

 Recommended tape I/O size: 131072 bytes (256 512-byte blocks)
 Minimum block size: 4 byte(s)
 Maximum block size: 16777212 bytes
 Current block size: 32768 byte(s)

samar 33# mt -f /dev/sdlt2 rewind

samar 34# mt -f /dev/sdlt2 blksize

 Recommended tape I/O size: 131072 bytes (256 512-byte blocks)
 Minimum block size: 4 byte(s)
 Maximum block size: 16777212 bytes
 Current block size: 32768 byte(s)

samar 35# dd bs=32768 if=scratch of=/dev/sdlt2
1+0 records in
1+0 records out

That out of the way I'll go back and see what the other outstanding
questions/tests where.

---
   Brian R Cuttler                 brian.cuttler AT wadsworth DOT org
   Computer Systems Support        (v) 518 486-1697
   Wadsworth Center                (f) 518 473-6384
   NYS Department of Health        Help Desk 518 473-0773