Re: 1x 3ware controllers vs. 2x 3ware controllers

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On Fri, 30 Jul 2004 at 11:16am, Mark Watts wrote

quoted

Basically anything involving I/O is causing the system to crawl.
I can reliably reproduce this by doing:

	mke2fs -j /dev/sda7

Where sda7 is a 600GB partition.

Basically the system load goes orbital and responsivness goes out the
window. gkrellm only shows ~1MB/sec of disk activity and the processors
(Dual Opteron) are twiddling their thumbs (top shows 100% 'wa' state for
both processors), yet I can hardly do anything with any open
applications.

Kernel is a 2.6.8rc1 kernel.org job.

Make sure that your driver and firmware versions match (check the 3ware
site).  Also, have you tried other FSs?  I get *very* good performance out
of 7500-8s using XFS on 2.4 (and hardware RAID5+software RAID0).  I
haven't tried 2.6 yet.

I'm running the latest firmware from www.3ware.com (FE8S 1.05.00.068)
Driver is v1.26.00.039 from kernel 2.6.8rc1

Obviously these aren't the same, but I can only see drivers for RedHat or 
generic 2.4 kernels on the 3ware site, not 2.6.x

Mark.

- -- 
Mark Watts
Senior Systems Engineer
QinetiQ Trusted Information Management
Trusted Solutions and Services group
GPG Public Key ID: 455420ED

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