[mythtv-users] Software RAID

MacNean Tyrrell dardack at gmail.com
Fri Mar 9 20:44:52 UTC 2007


On 3/9/07, Dan Ritter <dsr-myth at tao.merseine.nu> wrote:
>
> On Fri, Mar 09, 2007 at 02:31:26PM -0500, MacNean Tyrrell wrote:
> > So if i bought 4x500gb sata drives, than used my IDE 320gig, could the
> 320
> > server as the redundancy one and i would still get close to 2TB for
> storage,
> > or would i have to partition each drive by 250gig's, have 70 left on the
> 320
> > and the 250gig on the IDE could be the redundancy one?
>
> Erm. What? No, redundancy is striped across all available
> partitions.
>
> 4x500 + 1 x 320, you could:
> RAID 5: 5 x 320, effective 4x320 = 1280
> RAID 5: 4 x 500, effective 3x500 = 1500
> RAID 5: 5 x 250, effective 4x250 = 1000 +
>        4 x 250, effective 3x250 =  750 = 1750 in two filesystems
>
> LVM, no redundancy: 4x500 + 250 = 2250 and also a 70 filesystem
> left over.


but no backup for LVM right? So if a drive goes i loose it all?

http://en.wikipedia.org/wiki/Standard_RAID_levels
>
> -dsr-
>
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-- 
Sincerely,

MacNean C. Tyrrell
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