I have installed a DLT 7205-311 (IBM's version of a DLT 7000) on my 7013
J40 server. The drive was seen on boot up and shows a good status:
mode yes Use DEVICE BUFFERS during writes True
block_size 0 BLOCK size (0=variable length) True
extfm yes Use EXTENDED file marks True
ret no RETENSION on tape change or reset True
density_set_1 26 DENSITY setting #1 True
density_set_2 27 DENSITY setting #2 True
compress yes Use data COMPRESSION True
size_in_mb 35000 Size in Megabytes
I have been noticing several problems:
1) I place a DLT Compat IIIXT tape in the drive and then try to perform
a tar using:
tar -cvf /dev/rmt2 /
About half way through I get a "tar media surface is damaged" followed
by a Tape_ERR1 message in errpt. I open a brand new tape and try the
same thing and get the same error. This is not bad tapes because I can
then use these tapes on another system and I good backups.
It should be noted that the light on the tape drive shows the correct
I tried various block sizes like -b 128 etc.. and could not get a tar to
complete with the compact IIIXT tapes in the drive
2) I try to put a compact IV tape in the drive. The 20GB light comes on
(should be 35 shouldn't it?)
I then perform various tar's and other activities and they work.
Anyone know why the DLT IV tape shows up only with a 20GB size?
Any special settings I need to change to in order to use the IIIXT
The only notice I have seen is that when you are using IIIXT tapes you
need to change Density Setting 1 to 25 (I got this from the AIX 4.3 on
line documentation). I am currently running AIX 4.2.1.