2.6.7 SATA (SCSI emulation) sw-raid1 - lockup when 1 drive is removed

[Marinos J. Yannikos]

Hi,

A box with a stock 2.6.7 kernel using the Promise SX4 controller 
(CONFIG_SCSI_SATA_SX4, i.e. libata driver) locks up completely when one 
of the 2 drives in a raid 1 configuration is removed. I believe this is 
not how raid 1 is supposed to work. ;-) swap was initially on the drive 
  I removed only (/dev/sdb2), but I also tested this with swap on a 
raid volume (/dev/md2 = /dev/sdb2 + /dev/sdc2)- the effect is exactly 
the same in both cases.

The last message seen is: "ata1 DMA timeout", then the console stops 
working. dmesg output and config.gz available at: 
http://stuff.geizhals.at/misc/2004-08-04/

Perhaps there is a work-around or this issue can be resolved quickly 
before one of the drives actually dies...

Regards,
 Marinos
--
Dipl.-Ing. Marinos Yannikos, CEO
Preisvergleich Internet Services AG
Obere Donaustrasse 63, A-1020 Wien
Tel./Fax: (+431) 5811609-52/-55
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