SC1425 ATA lockup in RHEL4

Eberhard Moenkeberg emoenke at
Sat Mar 5 16:41:01 CST 2005


On Sat, 5 Mar 2005, Sellek, Greg wrote:

> I decided to press my luck and load up the brand new RHEL4 EMT64 on some 
> new SC1425's we just got in.  Each server has 2x250GB SATA drives, and 
> I'm using them in JBOD mode.
> My problem is that under moderate/heavy i/o load (like copying 20 GB 
> from one disk to the other), the server locks up.  About half the time 
> it is VERY unresponsive, and the other half it locks up solid.  If you 
> can pass an iostat to it, it shows no i/o but yet an iowait of 50%. 
> I'm using the ata_piix module.  The servers have 4GB of ram, so I never 
> ran into the issue mentioned earlier at install time.
> Anyone seen this at all?

I am "only" using SUSE-Professional (8.0 ... 9.2) and SLES (8 and 9) with 
my Dell servers (since years), so I definitely can't help.

Cheers -e
Eberhard Moenkeberg (emoenke at, em at

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