On Thursday 27 October 2005 12:42, Erik Karlin wrote: > On Thu, Oct 27, 2005 at 05:07:50PM +0100, Alexander Fisher wrote: > > On 10/27/05, David Bennett <[EMAIL PROTECTED]> wrote: > > > I must admit you have me quite intrigued by this RAID 5. > > > > > > So heres the deal, I am going to go out and buy some disks. > > > Anything I need to know before I start? > > > > 250GB disks currently seem to give the most GB per $ or ? > > > > > How (and what) do I need to know to setup a software Raid 5 on my > > > linux? Any guides etc.? > > > > I've had quite a bit of success installing Debian with RAID and LVM > > configured during the install. GRUB won't boot off RAID5 (or LVM?) > > but it will boot off RAID1. Therefore, I would suggest something like > > this ... > > > > 3 disks sda,sdb,sdc. 3 partitions on each. > > sd[abc]1 small (<1GB) RAID 1 (md0) formatted ext3 and used for /boot. > > sd[abc]2 small formatted for swap. Swap is automatically striped > > across swap partitions. If you don't want your system to potentially > > crash when you have a disk failure, you can put swap over RAID 1 > > instead. > > I've done exactly this, though I did do a raid1 for swap too. > > > sd[abc]3 remaining space, RAID 5, and one LVM PV on top of this. > > Create one VG and several LVs out of this, one for each of your other > > filesystems (/, /usr /var/mediastore etc.) Format these XFS but don't > > make them bigger than they need to be, (XFS can easily grow > > filesystems online but doesn't support shrinking). > > Here's where I diverge, and haven't seen mentioned yet. I went the > raid10 route instead. with raid5, you can lose up to 1 drive in the > array. any more and you lose the array. With raid10 you can lose half, > in theory, as long as they're not in the same raid1 set. I've got 6x250g > disks as 3 raid1 mirrors and then raid0 the 3 raid1 arrays.
does raid10 do parity? I thought raid 10 required a backup harddrive for every drive in the array? Steve _______________________________________________ mythtv-users mailing list [email protected] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
