Re: problem with a cobalt RaQ550 system and DMA (Serverworks OSB4

Alan Cox (alan@lxorguk.ukuu.org.uk)
23 Apr 2003 23:21:10 +0100

On Mer, 2003-04-23 at 22:27, Olivier Bornet wrote:
> I'm trying to install Debian on 4 RaQ550 with each 2 80GB disks. All
> seems OK with 3 of RaQ, but with one, it crash when I put the two disks
> in a RAID1 meta device. In fact, it as crash at about 6% before the 70GB
> partition is fully synchronized.

Bad block I think. Its a bug fixed in 2.4.21pre. It trips a sanity
check for an OSB4 bug inadvertantly. 2.4.21pre handles CSB5 with full
UDMA and OSB4 in MWDMA2 without tripping wrongly.

If your chipset is CSB5 you can also just comment out the check and
rebuild

Alan

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