[mythtv-users] Why RAID 5 stops working in 2009
jedi at mishnet.org
Tue Oct 28 15:33:22 UTC 2008
On Tue, Oct 28, 2008 at 11:25:39AM -0400, Magnus wrote:
> jedi wrote:
> > ...I've been thinking not RAID 10 but LVM on top of RAID1.
> I think that's going to be effectively the same as RAID10, but with
> added benefits; if you want to swap out RAID volumes in the future for
> volumes containing bigger drives, it's pretty easy to do it one mirror
> set at a time using RAID 1 + LVM. You add in the new array, do a
> pvmove, and then remove the pv for the old RAID volume from Volume Group.
That's pretty much what I was thinking. I don't need the speed benefits
of striping. I just want robust storage and a means to make it all appear
as a single filesystem. Although I'm still not sure about cutting my effective
storage space in half.
> If you've got a huge monolithic RAID10 volume, migrating data becomes
> more problematic if you want to do it on an incremental basis (like 2
> physical disks at a time).
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