[CentOS] CentOS 6.0 and 3ware 9650SE series RAID Performance

[Marcelo Beckmann]

Em 01-09-2011 17:41, Austin Godber escreveu:
>
> ===================  tw_cli info c2  ============================
> 
> Unit  UnitType  Status         %RCmpl  %V/I/M  Stripe  Size(GB)  Cache
>  AVrfy
> ------------------------------------------------------------------------------
> u0    RAID-5    OK             -       -       64K     6519.19   OFF  
>  OFF    

I have the same controller on Centos 5.

Did you try to active Cache on 3ware?

[17:56:04 root at backup ~]# lspci | grep 3ware
01:00.0 RAID bus controller: 3ware Inc 9650SE SATA-II RAID PCIe (rev 01)
[17:56:11 root at backup ~]# tw_cli /c4 show

Unit  UnitType  Status         %RCmpl  %V/I/M  Stripe  Size(GB)  Cache
AVrfy
------------------------------------------------------------------------------
u0    RAID-5    OK             -       -       64K     5587.9    RiW
ON


In the past I had a scenario where I started with Cache OFF and had a
poor performance, specially for write. After set Cache RiW I got better
performance.

I didn't test that controller on CentOS 6, but is good to know if there
is some problem, because my company sells equipment with that controller.


Best regards,

-- 
Marcelo Beckmann
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