[ale] High IOwait

[Jerry Yu]

you'll find quicker responses if you post on Dell's poweredge-linux forum:
http://lists.us.dell.com/mailman/listinfo/linux-poweredge

   - did the problem just start ?
   - did you run diag (dell's own 32-bit diag CD, OMSA's diag) to see
   whether there's hardware issue?
   - did you check out Dell's support/driver download site for pertinent
   firmware upgrade for PERC 3/Di controller, disk controller, BIOS, etc. and
   even software patches specific for SEL9 ?


On 1/18/07, Danny Cox <DCox at icc.net> wrote:
>
>  On Thu, 2007-01-18 at 11:37 -0800, ale at jeffx.com wrote:
>
> Hello all,I have a Dell 2650 with a RAID1 drive connected to a Dell PowerEdgeExpandable RAID controller 3/Di on a SuSE Enterprise Linux 9.3 serverrunning 2.6.5-7.283-bigsmp #1 SMP Wed Nov 29 16:55:53 UTC 2006 i686 i686i386 GNU/Linux.
> The system is hanging during or after file writes.  If I do something like:dd if=/dev/zero of=/home/jefft/file1 bs=512 count=864000 the system willeventually hang and come back.  Using sar, iostat, top, I can watch iowaitpercentage climb and climb until it hangs.  Then, when I can gain accessagain, it drops slowly.  The iowait percentage goes up even after the ddhas completed.
> There is no error messages in dmesg, messages or anyplace else.  Is theresome mechanism for tuning this?  Any help would be greatly appreciated.
>
>
>     I don't know about tuning this, but what filesystem is being used?
>
>  PS: I posted this yesterday and it didn't go through.  If you get twocopies.  I am sorry.
>
>
>     This is the only one I've seen....
>
>   --
> Daniel S. Cox
> Internet Commerce Corporation
>
>
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>
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