SuSE Support Database

Title: Adaptec 2940 kernel panic

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Adaptec 2940 kernel panic

Applicable to
S.u.S.E. version: until at least 4.4.1
Kernel version: until at least 2.0.29

Symptom:

There are problems with some AHA2940 during the installation and operation under Linux. It seems to be independant of the kernel version and of the BIOS version.

The following message might appear at booting time: 

SCSI: aborting command due to timeout: pid X scsi0, channel 0, 
      id X, lun 0, 0x00 00 00 00 00
aic7xxx: (abort_reset) scb state 0x01, Data-Out phase, SCSISIGI = 0x0
Or the following one appears while running the system: 
 scsi0 aborting command due to time out. 
 scsi0: Target 0, channel A, now synchronous at 10.0 MHz, offset 15
In both cases the consequence is that the system freezes during the required filesystem check.

Cause:

There is a fault in the documentation; although stated the hard disk can not take a transfer rate of 10mbps with the kernel. This problem in fact was only noticed with Quantum, Micropolis and some Seagate hard disks.

Solution:

The only solution is to decrease the hard disk's speed to 8mbps. This is reachable via the controller setup at boot time (CTRL-A). After you have done so everything should work fine.

If the translation mode (for big DOS partitions) is active in BIOS, the kernel parameter 

aic7xxx=extended
must be given.

Preview:

A new kernel that allows flexible mbps is being developed. So far there are only static 10mbps.

Credits:

This hint came from Thorsten Dombach (dombach@cip.informatik.uni-muenchen.de)

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See also:

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Keywords: 2940, AIC7XXX, SCSI, ABORTING COMMAND DUE TO TIME OUT, ABORT_RESET, NOW SYNCHRONOUS AT 10.0 MHZ, QUANTUM, MICROPOLIS, SEAGATE

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Feedback welcome: Send Mail to mantel@suse.de (Please give the following subject: SDB-2940_10mbps)

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SDB-2940_10mbps, Copyright SuSE GmbH, Nuremberg, Germany - Version:
Impressum - Last generated: 24. Feb 1999 14:41:23 by maddin with sdb_gen 1.00.0