From: Mark Lord <liml@rtr.ca>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Chuck Ebbert <cebbert@redhat.com>,
IDE/ATA development list <linux-ide@vger.kernel.org>,
craig48@swbell.net
Subject: Re: ATAPI tape drives broken with libata
Date: Thu, 13 Sep 2007 15:09:26 -0400 [thread overview]
Message-ID: <46E98AE6.5010003@rtr.ca> (raw)
In-Reply-To: <46E98A5E.8080109@rtr.ca>
>
>> 14:26:48 root: writing
>> 14:26:54 kernel: qc_issue: CDB 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>> 14:26:54 kernel: qc_issue_prot: CDB 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>> 14:26:54 kernel: qc_issue: CDB 05 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>> 14:26:54 kernel: qc_issue_prot: CDB 05 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>> 14:26:54 kernel: qc_issue: CDB 03 00 00 00 60 00 00 00 00 00 00 00 00 00 00 00
>> 14:26:54 kernel: qc_issue_prot: CDB 03 00 00 00 60 00 00 00 00 00 00 00 00 00 00 00
>> 14:26:54 kernel: ata3: DRQ=1 with device error, dev_stat 0x59
>> 14:26:54 kernel: st0: Sense Key : Illegal Request [current]
>> 14:26:54 kernel: st0: Add. Sense: Invalid command operation code
>
>
> One more bit of possibly helpful information here.
>
> The last time I wrote a working ATAPI Tape driver,
> it always translated SCSI opcode 0x05 (READ_BLOCK_LIMITS) into MODE_SENSE.
>
> I don't remember why it did that, but it was necessary at the time.
> So I wonder if the error above has anything to do with the READ_BLOCK_LIMITS
> command that can be seen just above the TEST_UNIT_READY and REQUEST_SENSE CDBs ?
Ah.. my notes to myself from that era say:
// ATAPI tape drives do not implement the "READ_BLOCK_LIMITS" command,
// but the same information can be obtained from a MODE_SENSE instead.
// So here we emulate the former, using the latter.
Cheers
next prev parent reply other threads:[~2007-09-13 19:09 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-29 22:55 ATAPI tape drives broken with libata Chuck Ebbert
2007-08-29 23:50 ` Alan Cox
2007-08-30 16:11 ` Chuck Ebbert
2007-08-31 14:19 ` Alan Cox
2007-09-13 16:35 ` Mark Lord
2007-09-13 18:22 ` Mark Lord
2007-09-13 18:42 ` Mark Lord
2007-09-13 19:07 ` Mark Lord
2007-09-13 19:09 ` Mark Lord [this message]
2007-09-19 20:50 ` Alan Cox
2007-09-22 0:28 ` Mark Lord
2007-09-21 3:07 ` Albert Lee
2007-08-30 4:00 ` Jeff Garzik
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