On Thu, 22 Mar 2007, Lamont Peterson wrote: > If you're not using RAID, might I suggest that you do? Those 9 disks would > make a nice RAID5 or RAID6 array, and LVM works beautifully on top of > software RAID, hardware RAID or any combination of both. > > LVM does not provide redundancy (yes, I know it can do mirroring, but I > wouldn't suggest that), it's about easily managing lots of storage space. > RAID is about reliability/redundancy. Use the right tool for the right job, > and use both tools together to get all the best benefits of both. In my use, reliability is paramount. So I prefer RAID1. You get a performance boost for reads as well. The md based mirrors can be mounted separately (careful!) if needed for data recovery and bug workarounds. (E.g. On Centos-3 grub won't install on mirrored boot partition. So unmount md0, setfaulty hdb1, mount hda1 /boot, grub-install, umount hda1, mount md0, raidhotadd hdb1.) RAID5 arrays can only be accessed as raid. -- Stuart D. Gathman <stuart@bmsi.com> Business Management Systems Inc. Phone: 703 591-0911 Fax: 703 591-6154 "Confutatis maledictis, flammis acribus addictis" - background song for a Microsoft sponsored "Where do you want to go from here?" commercial. _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/