On Fri, Mar 8, 2013 at 6:14 AM, SilverTip257 silvertip257@gmail.com wrote:
On Thu, Mar 7, 2013 at 6:54 PM, Gerry Reno greno@verizon.net wrote:
On 03/07/2013 06:52 PM, Les Mikesell wrote:
On Thu, Mar 7, 2013 at 5:40 PM, John R Pierce pierce@hogranch.com
wrote:
On 3/7/2013 3:35 PM, Gerry Reno wrote:
Dave, I've been using software raid with every type of RedHat distro
RH/CentOS/Fedora for over 10 years without any
serious difficulties. I don't quite understand the logic in all these
negative statements about software raid on that
wiki page. The worst I get into is I have to boot from a bootdisk if
the MBR gets corrupted for any reason. No big
deal. Just rerun grub.
have you been putting /boot on a mdraid? that's what the article is recommending against.
I've put /boot on md raid1 on a lot of machines (always drives small enough to be MBR based) and never had any problem with the partition looking enough like a native one for grub to boot it. The worst thing
No problems here either - I have had /boot on software raid1 on quite a few systems past and present.
I've seen about it is that some machines change their idea of bios
If I do have a drive fail, I can frequently hot-remove them and hot-add the replacement drive to get it resyncing without powering off.
disk 0 and 1 when the first one fails, so your grub setup might be wrong even after you do it on the 2nd disk - and that would be the same with/without raid. As long as you are prepared to boot from a rescue disk you can fix it easily anyway.
Good point, Les. Rescue disks and bootdisks are key and critical if you're going to use software raid.
I think we could argue that rescue disks are a necessity regardless one is using software raid or not. :)
Thanks for all of the helpful info, and now I have a follow on question. I have a Dell m6500 that I've been running as a RAID 1 using the BIOS RAID on RHEL 5. The issue is that when you switch one of the drives, the BIOS renames the RAID and then RHEL 5 doesn't recognize it anymore. So here are my questions:
1) Has this issue of handling the renaming been resolved in RHEL 6? (my guess is no) 2) Would a software RAID be a better choice than using the BIOS RAID? 3) If a software RAID is the better choice, are there going to be an impact on performance/stability/etc?
Thanks, Dave