Partially Resolved and it revolves around stinit from the mt_st rpm:
Current Status:
Apparently with older 2.4 kernel based versions of SUSE, stinit was
required to get my IBM ULTRIUM LTO-1 tape drive to work at all, so I
had it setup appropriately, but I've managed to misplace my old
stinit.def file I think.
I think I upgraded my tape server from 8.2 to 9.1 and then to 10.1
(There may have been a couple more intermediaries.) (I don't
remember if I did upgrades of full installs.)
Somewhere along the line I ended up with a 2.6 kernel that allowed me
to write new tapes and read them back in without the use of stinit and
the mt_st rpm ended up not installed so I was doing so for some number
of months minimum (possibly a couple years).
The trouble was (is) I could not read my 8.2 vintage tapes without
having stinit setup the kernel tape driver appropriately. I just
installed mt_st and created a stinit.def file to go with it and I can
now read the older tapes. (I used stinit.def entries I found for a
Tandberg LTO drive, so they are likely not perfect for my IBM.)
The trouble I'm having now is that when I read the tapes made without
running stinit first, they are taking forever to read. (ie. about
70MB/hr, so to read 100 GB will take literally forever.)
I would like to find a stinit.def set of values that will allow me to
read both my old and new tapes. Anyone have any suggestions on what
to try?
Based on the Tandberg LTO info I currently am using:
# IBM def per Greg Freemyer, don't know if any of this is accurate
manufacturer="IBM" model="ULTRIUM-TD1" {
scsi2logical=1
can-bsr=1
auto-lock=0
two-fms=0
drive-buffering=1
buffer-writes
read-ahead=1
async-writes=1
can-partitions=1
fast-mteom=1
# if your stinit support timeouts
timeout=180 # 3 minutes
long-timeout=14400 # 4 hours
#
mode1 blocksize=0 compression=1 # 200 GB, native
mode2 blocksize=0 compression=0 # 100GB, LTO
}
Also, going forward, how should I have stinit.def set to create tapes.
( This is all very confusing.)
Worst case, does anyone know how to reverse the effects of stinit so I
can read my more recent tapes at a reasonable speed without having to
reboot?
Greg
--
Greg Freemyer
The Norcross Group
Forensics for the 21st Century
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