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Re: write cache on 3ware controller and XFS

To: Christophe Zwecker <doc@xxxxxxxxxx>
Subject: Re: write cache on 3ware controller and XFS
From: Seth Mos <knuffie@xxxxxxxxx>
Date: Wed, 06 Nov 2002 10:38:29 +0100
Cc: linux-xfs@xxxxxxxxxxx
In-reply-to: <1036531054.20194.10.camel@dumbo.zwecker.de>
References: <4.3.2.7.2.20021105215943.03941310@pop.xs4all.nl> <4.3.2.7.2.20021105215943.03941310@pop.xs4all.nl>
Sender: linux-xfs-bounce@xxxxxxxxxxx
At 22:17 5-11-2002 +0100, Christophe Zwecker wrote:
On Tue, 2002-11-05 at 22:06, Seth Mos wrote:
> At 20:50 5-11-2002 +0100, Christophe Zwecker wrote:

snip

> What disks are attached, what speed and size, how many, what sort of raid
> config. Does it have a battery cache.
5x 120GB IBM 7200RPM IDE disks, RAID5 on an EVMS/LVM Volume

And what kernel are you currently using?

I dont have batter cache, but am I not safe with an USV , that shutsdown
the machine in case of power failure ?

No, if the power supply from your machine dies or the power cable from the UPS to the computer gets loose, you're screwed. If you "just switch of the machine after a failure instead of resetting it the ram is cleared and you're cache is gone.


Ah and system crashes can also cause problems like this.

uh, are there tools for that ?

I believe 3ware has a utility for that, although I remember that you might need to do it on a per drive basis.


it doesnt, rebooted like 3 times in one year, nothing happened sofar..

A normal reboot doesn't cover it. The machine needs to loose power for this to show up.


Cheers

--
Seth
It might just be your lucky day, if you only knew.


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