[geeks] Murphy, instantiated

[Phil Stracchino]

Jonathan Groll wrote:
> On Tue, Jun 02, 2009 at 09:37:44AM -0400, Phil Stracchino wrote:
>> Jonathan Groll wrote:
>> Two identical controllers, 12 disks.  I don't think it's a simple write
>> corruption issue, because the three failed disks didn't even come back
>> up on the bus after reboot.  They're dead as doornails.
>>
> So, the odds of all three disks failing on one controller are:
> 1/2 * 1/2 * 1/2 = 1/8 
> 
> or 1 in 4 that all three failed disks will belong to the same
> controller!
> 
> At the very least, it is worthwhile decommisioning the 'bad'
> controller (wouldn't trust it), and trying the 'failed' disks in
> another box altogether...

If I take down that controller, I don't have enough channels to run all
the disks.  I'm going to test the disks elsewhere once I pull them, but
I don't hold out much hope for them.  I trust the controller more than I
trust the disks; the disks already had two strikes against them -
they're Maxtor disks, and they've already seen several years of use
before I got them.


-- 
  Phil Stracchino, CDK#2     DoD#299792458     ICBM: 43.5607, -71.355
  alaric at caerllewys.net   alaric at metrocast.net   phil at co.ordinate.org
         Renaissance Man, Unix ronin, Perl hacker, Free Stater
                 It's not the years, it's the mileage.