Megaraid PERC4 check consistency problem

[Patrick Schreurs]

On Tue, 11 Sep 2007 Eoin_Mcguinn at dell.com wrote:

> If you are on one of the older firmwares for the controller, you may not
> have the functionality of Patrol Read. This will scan the physical disks
> in the background and recover any bad blocks that could be affecting the
> data set. Here's the documentation...
> http://www.dell.com/downloads/global/power/ps1q06-20050212-Habas.pdf
>
> I'd ensure that this is enabled.

This document tells you that patrol read is a lighter (less
robust, less performance impact) version of a consistency check.
If you do regular consistency checks, you don't need patrol read.
However, if you use patrol read, this document advises you
to also do consistency checks.

-Patrick

> -----Original Message-----
> From: linux-poweredge-bounces at dell.com
> [mailto:linux-poweredge-bounces at dell.com] On Behalf Of Dr. David Alan
> Gilbert
> Sent: 11 September 2007 12:19
> To: Boyd, Patrick
> Cc: linux-poweredge-Lists
> Subject: Re: Megaraid PERC4 check consistency problem
>
> * Patrick_Boyd at Dell.com (Patrick_Boyd at Dell.com) wrote:
> > If nothing else is wrong it would most likely be parity errors. This
> > can be caused by power loss.
>
> Well it's not had power loss this year and the errors have only started
> happening in the last two weeks.
>
> Are there any diagnostics I can run?
>
> Dave
> --
>  -----Open up your eyes, open up your mind, open up your code -------
> / Dr. David Alan Gilbert    | Running GNU/Linux on Alpha,68K| Happy  \
> \ gro.gilbert @ treblig.org | MIPS,x86,ARM,SPARC,PPC & HPPA | In Hex /
>  \ _________________________|_____ http://www.treblig.org   |_______/
>
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