SAS5IR performance issue with Dell 860

Espen Tagestad espen at
Sun Nov 25 04:50:38 PST 2007


We recently bought 3 new Dell 860 servers with the onboard SAS5/IR SATA 
RAID-controller. They seem to be quite well spec'ed servers with 
management and everything - but I am experiencing av major performance 
issue with the disc i/o. On write I get at max 7-8MB/sec, while read 
gives a bit more (11MB/sec). I tried first with 6.2-RELEASE, and then 
upgraded to 6.3-PRERELEASE without any better results.

I am aware of some discussion around this issue on these two maillists 
in the spring earlier on this year, but I have not been able to find any 
good resolution. My old firewall/router at home equipped with a 733Mhz 
Pentium 3 processor and a old 40GB IDE harddrive made around year 2001 
performe better. Is there anybody out there with the same problem who 
has solved this issue? Could it be that this is solved in 7.0?

Thanks in advance.

med vennlig hilsen/with regards,

Espen Tagestad
Modula AS

Tel. (+47) 23 89 75 80
Mob. (+47) 92 44 50 12
Fax. (+47) 23 89 75 81

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