On Sat, Jan 1, 2011 at 5:28 PM, John Mellor <john.mellor@xxxxxxxxx> wrote: > On Sat, 2011-01-01 at 16:43 -0800, suvayu ali wrote: >> On Sat, Jan 1, 2011 at 3:23 PM, John Mellor <john.mellor@xxxxxxxxx> 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 >> problem. > > 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. :) -- Suvayu Open source is the future. It sets us free. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
