Margaret Doll wrote:
We got to create the 13 Tb partition on the aux disk on the RedHat
system by using parted, but then mkfs.ext3 doesn't work on any partition
larger than 2 Tb.
It should do. I have 6 and 7.8TB filesystems. What version of RH are you
running? I suppose there may be limitations on some of the kernels, I am running
64bit RHEL 4. However, I think there is limitation of 8TB for ext2/3 on systems
which have a max. block/page size of 4kb. You need 8kb blocks/pages to get to
16TB, or a different filesystem type and it's unlikely your system can handle
that. Do you know what the max. page size if for your system?
If we split the aux disk into 2 Tb partitions, I understand from
http://www.linuxnix.com/2009/04/logical-volume-manager-lvm-in-redhat.html
that we use fdisk to change the partition type to 83 Linux LVM.
Unfortunately fdisk will only see the first 2 Tb partition, so we can't
create a LVM
of the partitions.
If you want to go this way create individual LUNs on your RAID. There is nothing
to be gained by partitioning the RAID. You can join the LUNs using LVM. That
would enable you to create an LVM of 13TB, but you've gained nothing over using
the bare device. You don't need a partition table on a device, you can create a
filesystem on the entire device, /dev/sdc for example, rather than /dev/sdc1 etc.
We went back to parted and created one 13 Tb partition. Then inside
parted, we used
mkfs 0 ext3
The program said that ext3 was not supported in this version of
parted, but ext2 was. I oked, ext2.
Inside parted
(parted) print
Model: IFT A16F-G2430 (scsi)
Disk /dev/sdc: 13.0TB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number Start End Size File system Name Flags
1 17.4kB 13.0TB 13.0TB ext3 primary
the partition is labeled as a ext3 file system.
Our 13 Tb partition was added to /etc/fstab as a ext3 filesystem and
mounted on the system.
"df -h" though lists it as a 1.8 Tb system.
/dev/sdc1 1.8T 196M 1.7T 1% /m3team
Did you actually create a filesystem on that 13TB partition? Or did you just use
the filesystem which you had already created previously when the partition was
only 2TB? I'd be interested to know what mkfs said when you asked it to create a
13TB filesystem, for example what block size did it set.
What does 'dumpe2fs /dev/sdc1' show?
--
Nigel Wade, System Administrator, Space Plasma Physics Group,
University of Leicester, Leicester, LE1 7RH, UK
E-mail : nmw@xxxxxxxxxxxx
Phone : +44 (0)116 2523548, Fax : +44 (0)116 2523555
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