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.
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.
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
How can we monitor the space used on the 13 Tb disk assuming that it
is mounted correctly?
How do we tell if it is mounted correctly?
On Aug 12, 2009, at 6:02 PM, sigpedag wrote:
Margaret Doll a écrit :
We are trying to use a 13 Tb disk on one of the latest RedHat
system; namely, 2.6.18-128.4.1.el5xen.
"ext3" cannot see beyond 2 Tb.
ext3 can manage 16TiB filesystems, but some tools (like "fdisk") can
only deal with 2TiB.
You can use GPT partitions and "parted" instead of "fdisk" like
Margaret suggests.
If you want to use standard tools, just split your 13TiB storage
into 2TiB pieces and "glue" them with LVM, this is how I use a +3TiB
storage.
- If the storage is seen like a single disk by the system, create
2TiB partitions with fdisk and change the type for "8E" (LVM), then
add this partitions to LVM with "pvcreate /dev/sdX1 /dev/sdX2 /dev/
sdX3 ..."
- If you can, create 2TiB LUNs, and use them directly in LVM, this
is much simpler, you don't have any partition to make : "pvcreate /
dev/sdX /dev/sdY /dev/sdZ ..."
After that, create a LV with the LVM devices and then create a LV in
the VG and then you can do a "mkfs.ext3" on the 13TiB LVM device.
Nicolas
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