initio.c driver question? Can read but not write; Initio Corporation INI-950 SCSI Adapter (rev 02)

[Marc D Ronell]

I am having trouble writing to a scsi tape drive which is connected to
a  startech PCISCSIUW card  that uses  the Initio  Corporation INI-950
chipset.  Using  the 2.6.39.3  kernel, I can  read from the  scsi tape
drive successfully, but  when I attempt to write,  the write fails.  I
am attempting  to write  as root to  avoid permission  problems.  This
failure seems to be potentially  a driver problem.  The tape drive and
tapes have been  tested earlier with a different box  and were used to
generate the tapes which were successfully read.

The failures are as follows:

root@myhost:~#  tar cvf /dev/st0 ~myaccount/
tar: Removing leading `/' from member names
/home/myaccount/
/home/myaccount/.netpanzer/
/home/myaccount/.netpanzer/log.txt
/home/myaccount/.netpanzer/config/
/home/myaccount/.netpanzer/config/netpanzer.xml
/home/myaccount/.newsrc.eld
/home/myaccount/2.4.24.config
/home/myaccount/.Xauthority
/home/myaccount/.xsession-errors
tar: /dev/st0: Cannot write: Input/output error
tar: Error is not recoverable: exiting now

The errors written to the /var/log/syslog are:

Jul 24 14:10:50 myhost kernel: [18806.011317] st0: Block limits 1 - 16777215 bytes.
Jul 24 14:11:32 myhost kernel: [18848.303903] st0: Sense Key : Illegal Request [current] 
Jul 24 14:11:32 myhost kernel: [18848.303909] st0: Add. Sense: Invalid command operation code
Jul 24 14:11:32 myhost kernel: [18848.303914] st0: Error on write filemark.
Jul 24 14:12:29 myhost kernel: [18905.561873] st0: Sense Key : Illegal Request [current] 
Jul 24 14:12:29 myhost kernel: [18905.561878] st0: Add. Sense: Invalid command operation code
Jul 24 14:12:51 myhost kernel: [18926.897446] st0: Sense Key : 0xf [deferred] [descriptor]
Jul 24 14:12:51 myhost kernel: [18926.897452] Descriptor sense data with sense descriptors (in hex):
Jul 24 14:12:51 myhost kernel: [18926.897455]         ff ff fe ef c9 24 a5 2d d3 29 6e 09 d0 56 00 00 
Jul 24 14:12:51 myhost kernel: [18926.897463]         00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
Jul 24 14:12:51 myhost kernel: [18926.897471]         00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
Jul 24 14:12:51 myhost kernel: [18926.897479]         00 00 00 00 00 
Jul 24 14:12:51 myhost kernel: [18926.897482] st0: <<vendor>> ASC=0xfe ASCQ=0xefASC=0xfe <<vendor>> ASCQ=0xef

Not sure if anyone is supporting the driver.  Thanks in advance for
any help or suggestions.

Marc

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