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Subject: Re: [linux-lvm] Need help with a particular use-case for pvmove.
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On 11/13/2010 10:57 PM, Stirling Westrup wrote:
> On Sat, Nov 13, 2010 at 6:03 PM, Lars Ellenberg
> <lars.ellenberg@linbit.com> wrote:
>> You will then have to reduce the bad-old drive from the VG, and
>> shutdown/unplug old/replug new, which of course involves downtime again.
>>
>> You should consider using some sort of RAID in the future.
> My last server lost 80% of its data due to a bug in the raid software,
> so I'm rather leery of going with a raid solution. I was hoping LVM
> would be better.
Use the linux md driver with RAID-1, simple and safe, and you can clone
a partition by just removing it from the RAID.  LVM does RAID-1 only if
you turn on mirroring for a LV.  LVM can't possible be "better" without
the redundancy - at which point you have RAID.