lvm limitations on RedHat 4 AS

Aaron Bliss abliss at brockport.edu
Fri Jan 23 19:02:43 UTC 2009


Thanks very much Tim.

Aaron

-----Original Message-----
From: redhat-list-bounces at redhat.com [mailto:redhat-list-bounces at redhat.com]
On Behalf Of De Vries, Timothy
Sent: Friday, January 23, 2009 10:01 AM
To: General Red Hat Linux discussion list
Subject: RE: lvm limitations on RedHat 4 AS


When I called into RedHat to get those numbers, those are what I was given
(2.6).

Tim

-----Original Message-----
From: redhat-list-bounces at redhat.com
[mailto:redhat-list-bounces at redhat.com]On Behalf Of Aaron Bliss
Sent: Friday, January 23, 2009 9:46 AM
To: 'General Red Hat Linux discussion list'
Subject: RE: lvm limitations on RedHat 4 AS


I found these figures; can anyone confirm?

For 2.4 based kernels, the maximum LV size is 2TB. For some older kernels,
however, the limit was 1TB due to signedness problems in the block layer.
Red Hat Enterprise Linux 3 Update 5 has fixes to allow the full 2TB LVs.
Consult your distribution for more information in this regard.

.         For 32-bit CPUs on 2.6 kernels, the maximum LV size is 16TB.

.         For 64-bit CPUs on 2.6 kernels, the maximum LV size is 8EB. (Yes,
that is a very large number.)

Aaron

-----Original Message-----
From: redhat-list-bounces at redhat.com [mailto:redhat-list-bounces at redhat.com]
On Behalf Of Aaron Bliss
Sent: Friday, January 23, 2009 9:42 AM
To: 'General Red Hat Linux discussion list'
Subject: lvm limitations on RedHat 4 AS

Hi all,
I'm familiar with managing logical volume groups and logical volumes on
RedHat boxes, however I've been unable to find out what the maximum size a
logical volume group and logical volume can be.  Does anyone have any tech
specs or links on this?  Thanks.

Aaron

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