On Sat, Jan 1, 2011 at 5:28 PM, John Mellor <firstname.lastname@example.org> wrote:
> On Sat, 2011-01-01 at 16:43 -0800, suvayu ali wrote:
>> On Sat, Jan 1, 2011 at 3:23 PM, John Mellor <email@example.com> wrote:
>> > I've got a 1.5TB Western Digital Green drive, and I'm not happy with the
>> > performance of it. *There are also several discussions online about
>> > these drives having an early ageing problem with ext4 filesystems
>> > because of them unloading the heads every 5 seconds and ext4 only
>> > flushing its journal every 30 seconds.
>> I have 2 1TB WD Black drives and one 300GB Velociraptor they all have
>> been working almost flawlessly. Could you please point me to what kind
>> of symptoms I might see if the above was true for my case?
>> PS: Did you by any chance get the unloading of heads and ext4 flushing
>> its journals interchanged? If not, I don't see how that would be a
> No, the problem is that with 30-second journal flushes to a WD green
> drive that unloads every 5 seconds, every time Linux goes to write to
> the disk, the heads have already been unloaded. *Loading them again
> takes a relatively long time, killing the performance. *Also, if you
> look up the green drive specs, they are only good for about 100k
> load/unload operations, or a lot less than 2 months unless you do
> something about it.
Thanks John for the explanation and the confirmation that I'm safe.
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