[linux-lvm] LVM - Combining different hard drives with different specs ?

Stuart D. Gathman stuart at bmsi.com
Mon May 23 02:05:24 UTC 2011

On Sat, 21 May 2011, Lee Gold wrote:

> I have a 100GB IDE HD that will fill up soon. I have a 1TB SATA drive I
> want to add. I am using Ubuntu Server 10.04, I installed the existing
> 100GB drive using LVM, only a single initial HD. I aim to increase my
> storage capacity under the server's document root /var/www... Before I
> get started hopefully asking intelligent questions and giving the needed
> information to help you help me, I wanted to ask this initial question:
> These two drives are different, they surely have different performance.
> Will this be a problem? If it was RAID I think matching drives are
> needed. I just want to add storage capacity with acceptable performance
> for a local in-house server.

Even for RAID, they don't have to match.  For RAID1, write speed will 
follow the slowest drive.

 	      Stuart D. Gathman <stuart at bmsi.com>
     Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.

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