[4145] in linux-scsi channel archive
Timeout errors with ncr53c895
daemon@ATHENA.MIT.EDU (Larry M. Augustin)
Wed Jun 17 17:56:11 1998
Date: Wed, 17 Jun 1998 09:31:23 -0700
From: "Larry M. Augustin" <lma@varesearch.com>
To: Oscar Fernandez Cantero <ofcantero@ceife.es>
Cc: linux-scsi@vger.rutgers.edu
In-Reply-To: <3587AA9C.C72CD573@ceife.es>
I assume you have decent cabling? Are you using an active LVDS
terminator? Neither the Cheetah nor Quantum Ultra2 drives currently
available terminate LVDS for Ultra2.
Larry
Oscar Fernandez Cantero writes:
> Hello SCSIers of the world,
>
> I have recently got a Symbios SYM8951U Ultra2 card with NCR53C895 SCSI
> chip.
> I use it with 3 Cheetah Ultra2 drives in a raid0 configuration.
> I use kernel 2.0.34 patched with driver NCR53C8XX version 3.0 (the last
> I think).
>
> When I use them in 20MHz mode (40Mb/s selectable in the setup utility of
> the card)
> all works fine. But when I try changing to 40MHz mode (Ultra2 mode) the
> configuration
> continues to be usable, but at arbitrary times an error arises that
> suspends
> the SCSI bus for a moment.
>
> The error says:
>
>
> scsi : aborting command due to timeout : pid 186838, scsi2, channel 0,
> id 2, lun 0 Read (6) 00 a5 48 30 00
> ncr53c8xx_abort: pid=186838 serial_number=186870
> serial_number_at_timeout=186870ncr53c895-0: abort ccb=013dd020 (cancel)
> scsi : aborting command due to timeout : pid 186837, scsi2, channel 0,
> id 1, lun 0 Read (6) 00 a5 48 36 00
> ncr53c8xx_abort: pid=186837 serial_number=186869
> serial_number_at_timeout=186869ncr53c895-0: abort ccb=06488820 (cancel)
> scsi : aborting command due to timeout : pid 186836, scsi2, channel 0,
> id 0, lun 0 Read (6) 00 a5 4e 32 00
> ncr53c8xx_abort: pid=186836 serial_number=186868
> serial_number_at_timeout=186868ncr53c895-0: abort ccb=06488020 (cancel)
> SCSI host 2 abort (pid 186838) timed out - resetting
> SCSI bus is being reset for host 2 channel 0.
> ncr53c8xx_reset: pid=186838 reset_flags=2 serial_number=186870
> serial_number_at_timeout=186870
> ncr53c895-0: resetting, command processing suspended for 2 seconds
> ncr53c895-0: enabling clock multiplier
> ncr53c895-0: Downloading SCSI SCRIPTS.
> ncr53c895-0: command processing resumed
>
> This message sequence use to be repeated indefinitely.
>
> A few of the times it is able to continue, the most I have to kill the
> process
> associated to stop the messages.
>
> If someone could give some useful hints it would be very appreciated.
>
> Thanks in advance
>
>
> --
> ------------------------------------------------------------------
> Oscar Fernández Cantero <ofcantero@ceife.es>
> CEIFE - Centro Español de Investigación Farmacoepidemiológica
> Almirante 28 2º http://www.ceife.es
> 28004 MADRID, SPAIN
> Phone: +34 91 531 7975
> Fax: +34 91 531 2871
> -------------------------------------------------------------------
>
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