Cc: adam radford <aradford@...>, Tony Battersby <tonyb@...>, Johannes Wörner <johannes.woerner@...>, James Bottomley <James.Bottomley@...>, linux-scsi <linux-scsi@...>, linux-kernel <linux-kernel@...>
Could you give some numbers, please?
However there are some known issues:
http://forums.storagereview.net/index.php?showtopic=25923http://tumbleweed.org.za/2007/02/16/horrific-performance-with-3ware-raid
Symptons are reasonable performance with large block ops, but really bad performance with small block ops.
time (cp -a linux-2.6.24.2 linux-2.6.24.2b; sync)
Gives me with some tuning 50 seconds here with a 9650SE in a 4 disk raid5 setup. (very bad, single disk will do it in <30s!!!)
But reading and writing large files with large block sizes is usually beyond > 100 MB/s
[snipped a lot]
Best regards,
Arnd
--