[7279] in linux-scsi channel archive
Re: health monitor for SCSI devices?
daemon@ATHENA.MIT.EDU (Louis J. LaBash)
Wed Sep 29 08:57:03 1999
Date: Wed, 29 Sep 1999 07:59:28 -0500
From: "Louis J. LaBash" <labash@lou1.ll.siue.edu>
To: "Georg P. Israel" <georg@redwave.net>
Cc: linux-scsi@vger.rutgers.edu
Message-ID: <19990929075928.A2970@lou1.ll.siue.edu>
Mime-Version: 1.0
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In-Reply-To: <no.id>; from Georg P. Israel on Wed, Sep 29, 1999 at 09:07:02AM +0200
On Wed, Sep 29, 1999 at 09:07:02AM +0200, Georg P. Israel wrote:
> I was wondering if there is an easy way to monitor the health of SCSI devices?
> What I'm looking for are early signs for the failure of a storage device.
>
> I guess devices usually don't brake down from one second to the next
> but probably start to develop anomalies prior to there final break down.
There are two types of failures, catastrophic and degradation.
Don't know if one is more likely than the other, I've seen both.
With HDs degradation occurred with ever increasing bad sectors, usually.
Catastrophic ones were failure to spin up, fluctuating speed, or stickion.
These were caused by malfunctioning of power circuitry, or were mechanical
in nature.
If reliability is paramount, look into disk arrays that use redundancy
to address this problem. I saw a disk array that allowed hot swapping
without loosing data, impressive.
Hope this is of some utility.
--
Louis-ljl-{labash@lou1.ll.siue.edu}
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