[linux-lvm] >2TB with LVM v1.0.3?

[linux-lvm] >2TB with LVM v1.0.3?

[Peter Smith]

[-- Attachment #1: Type: text/plain, Size: 1719 bytes --]

I'm running Redhat v7.2 (very old I know) and LVM v1.0.3 .  I have a 
1600GB ext3 partition currently in use and am planning to grow that by ~ 
6000GB.  From the documentation that I have found, it looks like I may 
be able to do this without modification to my system.  However, I'm 
querying to verify it..

Current ext3 filesystem has 4KB block size (supposedly good to 16TB total.)

I have one LV defined with a size of "3456106496".  I have two PVs, the 
first (sdc) with a size of "1646481408" and a PE size of "1048576", the 
second (sdd) with a size of "1815863296" and a PE size of "1048576" as well.

Allocation of the ext3 is at "1152717492" 1k-blocks used and "548221548" 
1k-blocks available right now.  The RAID system that the storage resides 
on has, up until now, sort-of enforced a roughly <2TB limit per device 
(2 cabinets currently with 1600GB and the RAID can not span cabinets,) I 
can continue to allocate ~ 2TB per device to fit within the kernel 2.4 
32-bit block device limit.  I do not know if I am actually limited to 
1TB per device as I've read before from Redhat, so that may be a 
possibility.

Here is my current vgdisplay
[root@swlx201 root]# vgdisplay
--- Volume group ---
VG Name               data
VG Access             read/write
VG Status             available/resizable
VG #                  0
MAX LV                256
Cur LV                1
Open LV               1
MAX LV Size           2 TB
Max PV                256
Cur PV                2
Act PV                2
VG Size               1.61 TB
PE Size               1 GB
Total PE              1648
Alloc PE / Size       1648 / 1.61 TB
Free  PE / Size       0 / 0


Any comments, questions, etc VERY welcome.

Peter Smith



[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 252 bytes --]

Re: [linux-lvm] >2TB with LVM v1.0.3?

[Peter Smith]

[-- Attachment #1: Type: text/plain, Size: 2348 bytes --]

To follow up, we got our new 6000GB online and I was able to allocate 
all the space to a single VG, but obviously you can only allocate VG 
space into slices (LVs), each a block device, and each limited to the 
2TB limit.

Peter Smith



Peter Smith wrote:

> I'm running Redhat v7.2 (very old I know) and LVM v1.0.3 .  I have a 
> 1600GB ext3 partition currently in use and am planning to grow that by 
> ~ 6000GB.  From the documentation that I have found, it looks like I 
> may be able to do this without modification to my system.  However, 
> I'm querying to verify it..
>
> Current ext3 filesystem has 4KB block size (supposedly good to 16TB 
> total.)
>
> I have one LV defined with a size of "3456106496".  I have two PVs, 
> the first (sdc) with a size of "1646481408" and a PE size of 
> "1048576", the second (sdd) with a size of "1815863296" and a PE size 
> of "1048576" as well.
>
> Allocation of the ext3 is at "1152717492" 1k-blocks used and 
> "548221548" 1k-blocks available right now.  The RAID system that the 
> storage resides on has, up until now, sort-of enforced a roughly <2TB 
> limit per device (2 cabinets currently with 1600GB and the RAID can 
> not span cabinets,) I can continue to allocate ~ 2TB per device to fit 
> within the kernel 2.4 32-bit block device limit.  I do not know if I 
> am actually limited to 1TB per device as I've read before from Redhat, 
> so that may be a possibility.
>
> Here is my current vgdisplay
> [root@swlx201 root]# vgdisplay
> --- Volume group ---
> VG Name               data
> VG Access             read/write
> VG Status             available/resizable
> VG #                  0
> MAX LV                256
> Cur LV                1
> Open LV               1
> MAX LV Size           2 TB
> Max PV                256
> Cur PV                2
> Act PV                2
> VG Size               1.61 TB
> PE Size               1 GB
> Total PE              1648
> Alloc PE / Size       1648 / 1.61 TB
> Free  PE / Size       0 / 0
>
>
> Any comments, questions, etc VERY welcome.
>
> Peter Smith
>
>------------------------------------------------------------------------
>
>_______________________________________________
>linux-lvm mailing list
>linux-lvm@redhat.com
>https://www.redhat.com/mailman/listinfo/linux-lvm
>read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>

[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 189 bytes --]