Re: Re: A question about RAID and partitions

[Matt Hyclak <hyclak@xxxxxxxxxxxxxx>]

On Tue, May 22, 2007 at 05:21:07PM -0700, centos@xxxxxxxxxxxxxxx enlightened us:
> On Tue, 22 May 2007 16:53:32 -0700
> Scott Silva <ssilva@xxxxxxxxxxxx> wrote:
> 
> > > Which one would be better under the aspects of performance (CPU
> > > utilization, disk
> > > transfer rate, etc), data security and ability to recover from
> > > a disk crash?
> > > 
> > > Does LVM bring a performance penalty?
> > I don't think LVM brings any penalty.
> 
> That's because you have not tried to recover an LVM. I had one
> with Raid1 and when drive1 failed, Boot was on disk 0.
> 
> I was hoping to able to boot from disk 0 then to put a new disk
> next day... To make a short story even shorter, no go. I had to
> restore from a 3 days old backup.
> 
> LVMs are very convenient for adding new drive and making them
> larger. I don't know of a live-CD that supports LVMs.

Apparently you've never used the CentOS4 Live CD, then. I used it to recover
data from an LVM on top of md disk just last week.

Matt

-- 
Matt Hyclak
Department of Mathematics 
Department of Social Work
Ohio University
(740) 593-1263
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