Re: WDC WD15EARS-00Z5B1: harddrive which does crazy unloading

[Mark Lord <kernel@teksavvy.com>]

On 03/09/10 03:05, Tejun Heo wrote:
> Hello,
>
> Sorry about very late reply.
>
> On 02/09/2010 03:33 AM, Al Bogner wrote:
>> I append info of an 1.5 TB WD Caviar green drive with a lot of start/stop
>> cycles. I would like to mention, that I have 4 1 TB Caviar green (WD10EADS)
>> which work fine!
>>
>> The e-SATA drive is used with this machine:
>> http://www.smolts.org/client/show/pub_b214fce2-b5b5-4a32-ba7e-cf9de6d55757
>> but has problems with other machines too.
>>
>> I use Openesuse 11.1
>> Kernel 2.6.27.42-0.1-default
>> FANTEC Fanbox FB-35US2 (probably JMicron 20360/20363 AHCI Controller)
>> storage-fixup-0.2-25.3 is installed, but not especially configured
>>
>> If you need more info let me know.
>
> How fast does it increase?  ie. counts / hour.
..

The default on these drives is to unload heads
after a mere eight (8) seconds of inactivity.

Ugh.

The wdidle3-1.03 DOS tool can fix that.  Google it.

I have disassembled that tool here, and found a few
vendor-unique commands inside it.  But thus far have
not managed to get them working natively in Linux.

I really need a SATA tracer/analyser..

-ml