problem with SureStore DAT40 in RH7.2

[Carlos Rosero]

Hi, I am using RH 7.2 with kernel 2.4.18-3 and using a Tekram scsi card - scsi0 : sym53c8xx-1.7.3c-20010512. and I have a HP SureStore dds DAT40.
When I type dmesg at bottom says:
st0: Write not multiple of tape block size.
sym53c875-0-<3,*>: FAST-20 WIDE SCSI 40.0 MB/s (50.0 ns, offset 16)
sym53c875-0-<3,*>: FAST-20 WIDE SCSI 40.0 MB/s (50.0 ns, offset 16)

The problem is: when I use mt -f /dev/st0 status-rewind-eject etc. I works, but when I try to TAR some file or directory, it gives me the following error:
tar: /dev/st0: Wrote only 0 of 10240 bytes
tar: Error is not recoverable: exiting now

Thanks for your help,if you need some information please let me know.
Carlos

[I_M]

Hi,

I have seen similar problem, but different scsi card & DDS drive.

That time, # mt -f /dev/st0 setblk 0 solved the problem.

But I can advice some more.

1) scsi driver....
There are 2 types of driver ; sym53c8xx and sym53c8xx_2.
Can you change the driver and try?

2) The default setting of the scsi driver, it uses SCSI Tagged Command Queue ON. Can you adjust the queue depth or disable it?
You need to change the value using make menuconfig or make xconfig, then re-compile the kernel.

3) Confirm scsi termination.

good luck

[Carlos Rosero]

Thanks Massanari.
It works. have a nice day!
Carlos