RAID1 with GPT ?

[dipeshmehta]

Hello,

I have successfully installed and tested configuring software RAID1 as guided in http://www.howtoforge.com/how-to-set...n-ubuntu-10.04 on my test environment.

However, my production server is with 2 TB drives, the partitions during installation created GPT. Now fdisk and sfdisk commands do not work with GPT which have been used in the said howto.

I installed gdisk to deal with, and its almost similar to fdisk, but couldn't find alternative for sfdisk. Then I came to know about a comment by paul at http://www.howtoforge.com/how-to-set...debian-squeeze. I am going to install it again as commented.

I would like to invite suggestion and other ways of doing the same.

Dipesh

[falko]

What is GPT?

[dipeshmehta]

Originally Posted by falko

What is GPT?

root@GPT-RAID:~# fdisk -l

WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.


Disk /dev/sda: 2199.0 GB, 2199022206976 bytes
255 heads, 63 sectors/track, 267349 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1      267350  2147482623+  ee  GPT

root@GPT-RAID:~# gdisk -l /dev/sda
GPT fdisk (gdisk) version 0.5.1

Partition table scan:
  MBR: protective
  BSD: not present
  APM: not present
  GPT: present

Found valid GPT with protective MBR; using GPT.
Disk /dev/sda: 4294965248 sectors, 2.0 TiB
Disk identifier (GUID): D68031F5-9C77-471F-BE42-DADC86F5B8D5
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 4294965214
Total free space is 4029 sectors (2.0 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1            2048          976895   476.0 MiB   EF00
   2          976896        30273535   14.0 GiB    8200
   3        30273536      4294963199   2.0 TiB     0700

http://de.wikipedia.org/wiki/GUID_Partition_Table