[mythtv-users] Another take on large-capacity disk enclosures

[Robin Hill]

On Tue Jun 16, 2009 at 11:11:07PM +0100, Robin Hill wrote:

> On Tue Jun 16, 2009 at 12:10:25PM -0700, Yeechang Lee wrote:
> 
> > Steve Heistand <steve at heistand.org> says:
> > > any journaled filesystem is easy to fsck, its the rebuilding a drive
> > > that takes a while these days. 20 drives would take a while to init
> > > and or rebuild if you had to. not like days of course but unless you
> > > crank up the cpu/bandwidth limits way up it would be 10+ hours.
> > 
> > Building, yes; said 6.6TB/16 takes 4-6 hours, as mdadm (still!)
> > doesn't use more than one core.
> > 
> 
> I'd have a serious look at your system if the mdadm build is CPU
> limited.  Every system I've used over the last few years has been I/O
> limited for any mdadm operation.
> 
Oh, and just to add - mdadm is actually doing very little here.  The
array construction/rebuild is all done by the md code within the kernel.

Cheers,
    Robin
-- 
     ___        
    ( ' }     |       Robin Hill        <myth at robinhill.me.uk>  |
   / / )      | Little Jim says ....                            |
  // !!       |      "He fallen in de water !!"                 |
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