[linux-lvm] Limits

Anders Widman andewid at tnonline.net
Fri Sep 27 16:10:54 UTC 2002

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

> http://www-106.ibm.com/developerworks/library/l-lvm2.html
> 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).

I  thought this limitation (2TB) would be removed in newer kernels, or
am I mistaken?

- Anders

>  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?
> Thanks.
>         Luke Reeves 
>         luke at oceanlake.com 

More information about the linux-lvm mailing list