Hi,
I'm using lvm-1.0.3-15 on RHEL3-AS, kernel 2.4.21-9.0.1.ELsmp.
I've got two SCSI devices attached to the system, each one is 1.74TB in
size. I want to make a single ext3 filesystem out of those devices. So I
thought I'd try using LVM.
Even though I set the PE size to 512MB ("vgcreate -s512 /dev/sda
/dev/sdb"), and I can see the VG size is correct (3.18TB), the maximum LV
size is still 2TB:
#vgdisplay
[root@xxxxxx root]# vgdisplay
--- Volume group ---
VG Name test-vg
VG Access read/write
VG Status available/resizable
VG # 0
MAX LV 256
Cur LV 0
Open LV 0
MAX LV Size 2 TB
Max PV 256
Cur PV 2
Act PV 2
VG Size 3.18 TB
PE Size 512 MB
Total PE 6510
Alloc PE / Size 0 / 0
Free PE / Size 6510 / 3.18 TB
VG UUID dU1Xjg-w0Y4-aeh2-yU4l-Wo7g-Lewx-r6l1cT
Later in the man pages, it says something briefly about a 2TB block device
limit in linux 2.4:
#man vgcreate
"There is also (as of Linux 2.4) a kernel limitation of 2TB per block
device."
Is an LV a "block device" and is this why I can't seem to create an LV
bigger than 2TB? If this is the problem, then LVM2 wouldn't even help,
would it? Is it really true that no one can create a non-softwareRAID
filesystem bigger than 2TB on linux 2.4? That just can't be true. Can it?
There must be some way to get a kernel patch that increases the block
size? Is that configurable?
Thanks in advance,
Alex
--- ---
Alex Lazarevich | Systems Administrator | Imaging Technology Group
Beckman Institute | University of Illinois | www.itg.uiuc.edu
--- ---
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