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Hello,
I have a number of tapes I wrote - and verified - a few years ago on various SGI
(Silicon Graphics) workstations running Irix 5.2 and Irix 6.2. The tapes are Maxell
HS-4/60s 2GB DAT tapes. I have a Red Hat 9 workstation in which I installed an old
Python DAT drive, which seems to have installed perfectly (output of dmesg):
scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.8
<Adaptec 2930CU SCSI adapter>
aic7860: Ultra Single Channel A, SCSI Id=7, 3/253 SCBs
blk: queue c365cc14, I/O limit 4095Mb (mask 0xffffffff)
Vendor: ARCHIVE Model: Python 27871-XXX Rev: 1214
Type: Sequential-Access ANSI SCSI revision: 02
blk: queue c365ce14, I/O limit 4095Mb (mask 0xffffffff)
Version of kernel:
# uname -r
2.4.20-8
Tape status:
# mt -f /dev/st0 status
SCSI 2 tape drive:
File number=0, block number=0, partition=0.
Tape block size 512 bytes. Density code 0x13 (DDS (61000 bpi)).
Soft error count since last status=0
General status bits on (45010000):
BOT WR_PROT ONLINE IM_REP_EN
Several of the tapes were written with cpio (using "cpio -ovBc -O /dev/tape" under
Irix), and some were written using tar and Backup (a wrapper to 'bru'). I can't read
any of these tapes; I can't even use 'dd' to attempt to dump the tape contents:
[EMAIL PROTECTED] tape1]# dd if=/dev/st0 of=archive1
dd: reading `/dev/st0': Input/output error
0+0 records in
0+0 records out
Do I need to set another blocksize? Do I need to swap bytes? I've been Googling for
hours on this problem to no avail. Anyone dealt with this before? I can't tell the
blocksize of the tapes: there doesn't seem to exist the "blksize" option ('mt -f
/dev/st0 blksize') in Red Hat's 'mt'.
I'm pretty sure that the Python drive works well and the tapes are OK: I sacrificed
the data on a couple of tapes , successfully reading and writing from them; tar, cpio,
and dd all worked as they should.
So, I'm sure the answer lies somewhere in the world of blocksizes and byte orders.
Can anyone help?
Thanks in advance,
Russell
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