Chris Samuel wrote:
----- "Rahul Nabar" <rpna...@gmail.com> wrote:

I contact Dell. Responses range from the clueless to absurd. First,
they convinced us it was Fedora. So I shifted to CentOS. They still
claim CentOS is "unvalidated" but I refuse to spend a fortune to move
over to RHEL like they want me to.

Not that this helps, but you have my sympathy as I've
been dealing with the same stuff from IBM over a storage
server they sold us.

Turns out I can make 7-12 drives in their external
enclosures fail in short order (seconds to minutes
between failures) by telling the software RAID to
do a check, thus:

for i in md[0123]; do
   echo check > /sys/block/$i/md/sync_action
done

Are these softirq cpu hangs?

could you tell me what

  cat /sys/block/md[0123]/md/stripe_cache_size

reports?


Even though we could reproduce it on 64-bit Debian
and 32-bit CentOS they wouldn't escalate the issue
until we could reproduce it on RHEL5 - which we did
today.

Sigh..



--
Joseph Landman, Ph.D
Founder and CEO
Scalable Informatics LLC,
email: land...@scalableinformatics.com
web  : http://www.scalableinformatics.com
       http://jackrabbit.scalableinformatics.com
phone: +1 734 786 8423 x121
fax  : +1 866 888 3112
cell : +1 734 612 4615
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