IDE-Streamer and ide-scsi ...

IDE-Streamer and ide-scsi ...

Post by Christia » Thu, 01 Dec 2005 12:48:22


I have problems reading from my IDE-Streamer (Seagate STT20000A).

The device is recognized as /dev/st0. dmesg shows:

Attached scsi tape st0 at scsi0, channel 0, id 0, lun 0
st0: try direct i/o: yes (alignment 512 B), max page reachable by HBA

The device is primary slave (hdb), ide-tape is unloaded and ide-scsi is
loaded via /etc/init.d/boot.local (OSS 10.0, Kernel 2.6.13-15). Grub is
provided hdb=ide-scsi. Writing on the tape with tar apparently works
without problems as the streamer issues typical sounds and the
procedure lasts reasonably long. But when displaying, verifying or
restoring a backup the device starts doing something for some seconds
but in fact, nothing happened.

/proc/ide/hdb/settings says that UDMA is active and that the device
works in PIO write-only mode.

I upgraded from SuSE 9.3 where everything worked fine. Under 9.3 I had
to turn DMA off for a proper function, putting hdparm -d0 /dev/hdb.
Now, /dev/hdb no longer exists.

Can anyone help me?


IDE-Streamer and ide-scsi ...

Post by Benwa » Thu, 01 Dec 2005 20:13:44

Can you disable ide-scsi emulation and go back to standard /dev/hdb
(/dev/ht0) and turn of DMA ?

For what it is worth my experience with travan tape drives leads me to
steer clear and go for a scsi DAT or AIT.