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. -- 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
