[linux-lvm] failing hard drive
tim at arabidopsis.info
Mon Mar 26 09:18:17 UTC 2007
Stuart D. Gathman wrote:
> 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.
Well I changed the drive and it seems to work although dd appears to
have copied the error across beacuse smartd reports
Device: /dev/hde, 1 Currently unreadable (pending) sectors.
I guess this would be expected? There are no heat issues.
You are correct about the redundancy issue - it's not my choice. I think
space was paramount when the machine was built.
Thanks for all the help,
More information about the linux-lvm