[mythtv-users] The Bigger... Disk contest, Fall 2007 edition
Jay R. Ashworth
jra at baylink.com
Thu Oct 18 15:53:14 UTC 2007
On Thu, Oct 18, 2007 at 11:15:30AM -0400, Dan Ritter wrote:
> On Thu, Oct 18, 2007 at 10:56:36AM -0400, Jay R. Ashworth wrote:
> > On Thu, Oct 18, 2007 at 07:29:34AM -0600, Joe Ripley wrote:
> > > My system isn't nearly as large (only 1.5 TB), however, I just wanted
> > > to mention that you don't need a dedicated drive just for booting when
> > > using software RAID. I usually make my boot drive a RAID1 across all
> > > of my installed disks, just to make sure the system can boot in the
> > > event of multiple drive failure.
> >
> > Booting off a mirror is ok. I just get hives whnm people tell me their
> > boot drive is on a RAID 5.
> >
> > "mak[ing] your boot drive a RAID1 across all your disks" implies two
> > things I can't get my head around: mirroring more than 2 drives, and
> > what I assume is mirroring only single partitions?
>
> Consider 6 320GB disks, each with 3 partitions:
>
> filesystem disk1 disk2 disk3 disk4 disk5 disk6
> / 20GB mirror mirror mirror mirror mirror mirror
> swap1 1GB mirA mirA
> swap2 1GB mirB mirB
> swap3 1GB mirC mirC
> /video 299GB RAID5 RAID5 RAID5 RAID5 RAID5 RAID5
> x5
>
> Any drive can be booted.
> Any drive can fail and the system can continue without data loss
> Most two-drive combos can fail (not 1&2, 3&4, 5&6) and only
> video will be lost.
>
> It's not unreasonable.
Maybe not, but it violates the Principle of Least Astonishment rather
badly in at least two dimensions, for a random Linux geek walking up to
repair it... I try to make my setups "Jay gets hit by a bus"-proof.
Cheers,
-- jra
--
Jay R. Ashworth Baylink jra at baylink.com
Designer The Things I Think RFC 2100
Ashworth & Associates http://baylink.pitas.com '87 e24
St Petersburg FL USA http://photo.imageinc.us +1 727 647 1274
More information about the mythtv-users
mailing list