[linux-lvm] hardware raid5 and lvm "recipe"

Sam Vilain sam at vilain.net
Mon Mar 7 20:31:00 UTC 2005

Amir Mistric wrote:
> We are contemplating to start using RHEL v4 in our enterprise.
> Most of our servers have a hardware RAID.
> The server we are using for a RHEL 4 trial install has 4x36GB SCSI 
> drives configured using RAID 5.
> Of course, we also want to use LVM.
> Can someone please suggest what would be the best “layout”/”recipe” 
> considering the configuration I described?
> Using “automatically” partitioning during install RHEL suggests:
> /boot and swap outside LVM and the rest of space in LVM mounted under / 
> file system.
> Is this sufficient layout for maximum flexibility? Should I create other 
> logical volumes and file systems?

Seems like a good enough policy.  An alternative is to have a larger
root, so that you can do LVM diagnostics without using a boot CD.  But
using a standard vendor configuration means that you're going to surprise
fewer admins that come along.

> Any tips are appreciated

Here's a tip... simulate a failure and make sure that you can detect it.
If you've got pluggable disks, then quiesce the system and unplug one.
Never unplug an active disk, of course.
Sam Vilain, sam /\T vilain |><>T net, PGP key ID: 0x05B52F13
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