Thread: add new partition under raid-1 array

i have small /tmp partition , and i want to create new partition with size 10 G.B ext3 /tmp than current one , i have two hard disk on raid-1 array

Code:

# mdadm --query --detail /dev/md0
/dev/md0:
        Version : 0.90
  Creation Time : Sat May 26 19:45:25 2012
     Raid Level : raid1
     Array Size : 33553344 (32.00 GiB 34.36 GB)
  Used Dev Size : 33553344 (32.00 GiB 34.36 GB)
   Raid Devices : 2
  Total Devices : 2
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Tue Nov 13 05:09:09 2012
          State : clean
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0

           UUID : 95977b4c:6be67738:776c2c25:004bd7b2
         Events : 0.400

    Number   Major   Minor   RaidDevice State
       0       8        1        0      active sync   /dev/sda1
       1       8       17        1      active sync   /dev/sdb1





root@server [~]# fdisk -l

WARNING: The size of this disk is 3.0 TB (3000592982016 bytes).
DOS partition table format can not be used on drives for volumes
larger than 2.2 TB (2199023255040 bytes). Use parted(1) and GUID
partition table format (GPT).


Disk /dev/sda: 3000.5 GB, 3000592982016 bytes
64 heads, 32 sectors/track, 2861588 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               2       32768    33553408   fd  Linux raid autodetect
/dev/sda2           32769       33280      524288   fd  Linux raid autodetect
/dev/sda3           33281     1081856  1073741824   fd  Linux raid autodetect
/dev/sda4         1081857     2861588  1822445568   85  Linux extended
/dev/sda5         1081857     2861588  1822445567+  fd  Linux raid autodetect

WARNING: The size of this disk is 3.0 TB (3000592982016 bytes).
DOS partition table format can not be used on drives for volumes
larger than 2.2 TB (2199023255040 bytes). Use parted(1) and GUID
partition table format (GPT).


Disk /dev/sdb: 3000.5 GB, 3000592982016 bytes
64 heads, 32 sectors/track, 2861588 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               2       32768    33553408   fd  Linux raid autodetect
/dev/sdb2           32769       33280      524288   fd  Linux raid autodetect
/dev/sdb3           33281     1081856  1073741824   fd  Linux raid autodetect
/dev/sdb4         1081857     2861588  1822445568   85  Linux extended
/dev/sdb5         1081857     2861588  1822445567+  fd  Linux raid autodetect

Disk /dev/md2: 1099.5 GB, 1099511562240 bytes
2 heads, 4 sectors/track, 268435440 cylinders
Units = cylinders of 8 * 512 = 4096 bytes

Disk /dev/md2 doesn't contain a valid partition table

Disk /dev/md3: 1866.1 GB, 1866184130560 bytes
2 heads, 4 sectors/track, 455611360 cylinders
Units = cylinders of 8 * 512 = 4096 bytes

Disk /dev/md3 doesn't contain a valid partition table

Disk /dev/md1: 536 MB, 536805376 bytes
2 heads, 4 sectors/track, 131056 cylinders
Units = cylinders of 8 * 512 = 4096 bytes

Disk /dev/md1 doesn't contain a valid partition table

Disk /dev/md0: 34.3 GB, 34358624256 bytes
2 heads, 4 sectors/track, 8388336 cylinders
Units = cylinders of 8 * 512 = 4096 bytes

Disk /dev/md0 doesn't contain a valid partition table


root@server [~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/md2             1016G  779G  186G  81% /
/dev/md1              496M   42M  429M   9% /boot
/dev/md3              1.7T  165G  1.5T  11% /home
/usr/tmpDSK           1.9G   42M  1.8G   3% /tmp

how could i do it ?