Date: Fri, 25 Jan 2008 21:05:27 +0000 From: Thomas Hurst <tom.hurst@clara.net> To: Chuck Swiger <cswiger@mac.com> Cc: Joe Peterson <joe@skyrush.com>, freebsd-stable@freebsd.org Subject: Re: "ad0: TIMEOUT - WRITE_DMA" type errors with 7.0-RC1 Message-ID: <20080125210527.GA40754@voi.aagh.net> In-Reply-To: <3803988D-8D18-4E89-92EA-19BF62FD2395@mac.com> References: <479A0731.6020405@skyrush.com> <20080125162940.GA38494@eos.sc1.parodius.com> <479A3764.6050800@skyrush.com> <3803988D-8D18-4E89-92EA-19BF62FD2395@mac.com>
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* Chuck Swiger (cswiger@mac.com) wrote:
> On Jan 25, 2008, at 11:24 AM, Joe Peterson wrote:
>> ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED
>> WHEN_FAILED RAW_VALUE
>> 1 Raw_Read_Error_Rate 0x000f 114 071 006 Pre-fail Always
>> - 82422948
> [ ... ]
>>
>> 7 Seek_Error_Rate 0x000f 084 060 030 Pre-fail Always
>> - 286126605
> [ ... ]
>> 195 Hardware_ECC_Recovered 0x001a 063 046 000 Old_age Always
>> - 166181300
>
> These numbers are quite worrysome-- they should be zero or nearly so in a
> healthy drive.
No, these are perfectly reasonable for a Seagate. I have about 12
7200.X's and all show the same sort of behavior. If they're nearly zero
it's probably a sign your manufacturer isn't actually counting them
(marketroids hate accurate SMART readings).
Try graphing them as counters; with an idle disk you'll see periodic
sawtooth patterns as the heads crawl from one side of the disk to the
other.
--
Thomas 'Freaky' Hurst
http://hur.st/
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