[linux-lvm] Limits

Ryan Leathers Ryan.Leathers at globalknowledge.com
Fri Sep 27 13:58:13 UTC 2002

Here is your answer taken from a document that helped me with the same

The extent size determines the maximum size that a logical volume can
be. As you can see from the above output, a 4 MB extent size imposes a
logical volume size limitation of 256 Gigabytes, which is an easily
attainable logical volume size if you're adding several high-capacity
drives to your volume group. If your volumes could end up being greater
than 256 GB apiece, I recommend specifying a larger extent size at
vgcreate time. Extents can range anywhere from 8 KB to 512 MB, and must
always be a multiple of two. By increasing the extent size above 4 MB,
the maximum physical volume size will be scaled accordingly, up to a
maximum of 1 Petabyte (although the current real-world size limit is 2
Terabytes on x86 systems). For example, if I wanted to create a volume
group with 32 Megabyte extents, I'd type: 

# vgcreate -s 32M main /dev/hda5
-----Original Message-----
From: Luke Reeves [mailto:luke at oceanlake.com]
Sent: Friday, September 27, 2002 2:55 PM
To: 'linux-lvm at sistina.com'
Subject: [linux-lvm] Limits
What are the current limits (specifically on LVM 1.0.5) of each
volume/disk?  I read 255GB in one of the docs.  Can anyone fill me in?
        Luke Reeves 
        luke at oceanlake.com 
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