"ad0: TIMEOUT - WRITE_DMA" type errors with 7.0-RC1

Thomas Hurst tom.hurst at clara.net
Fri Jan 25 13:05:32 PST 2008


* Chuck Swiger (cswiger at 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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