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

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


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