How do I add a partition to a disk under linux redhat using parted?

petulia3478

This article adds adds a partition and then uses it to create a volume group and logical volume.

First see what you have already, c0d0 is the whole disk, which had three partitions p1, p2, and p3.

# cd /dev/cciss
# ls
c0d0  c0d0p1  c0d0p2  c0d0p3

Use parted to add the new partition, p4 is the extended partition, after adding the intial partitions, the remaining space is the extended partition, from this you can add other partitions.

# parted
GNU Parted 1.6.19
Copyright (C) 1998 - 2004 Free Software Foundation, Inc.
This program is free software, covered by the GNU General Public License.

This program is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.  See the GNU General Public License for more details.

Using /dev/cciss/c0d0
(parted) p
Disk geometry for /dev/cciss/c0d0: 0.000-69973.593 megabytes
Disk label type: msdos
Minor    Start       End     Type      Filesystem  Flags
1          0.031    101.975  primary   ext3        boot
2        101.975   5224.262  primary   ext3
3       5224.263  21610.876  primary   linux-swap
4      21610.876  69970.605  extended

(parted) m

  check MINOR                   do a simple check on the filesystem
  cp [FROM-DEVICE] FROM-MINOR TO-MINOR      copy filesystem to another partition
  help [COMMAND]                prints general help, or help on COMMAND
  mklabel LABEL-TYPE            create a new disklabel (partition table)
  mkfs MINOR FS-TYPE            make a filesystem FS-TYPE on partititon MINOR
  mkpart PART-TYPE [FS-TYPE] START END      make a partition
  mkpartfs PART-TYPE FS-TYPE START END      make a partition with a filesystem
  move MINOR START END          move partition MINOR
  name MINOR NAME               name partition MINOR NAME
  print [MINOR]                 display the partition table, or a partition
  quit                          exit program
  rescue START END              rescue a lost partition near START and END
  resize MINOR START END        resize filesystem on partition MINOR
  rm MINOR                      delete partition MINOR
  select DEVICE                 choose the device to edit
  set MINOR FLAG STATE          change a flag on partition MINOR

(parted) mkpart logical ext3 21610.907 69970.605

(parted) p
Disk geometry for /dev/cciss/c0d0: 0.000-69973.593 megabytes
Disk label type: msdos
Minor    Start       End     Type      Filesystem  Flags
1          0.031    101.975  primary   ext3        boot
2        101.975   5224.262  primary   ext3
3       5224.263  21610.876  primary   linux-swap
4      21610.876  69970.605  extended
5      21610.907  69970.605  logical   ext3

(parted) quit
Information: Don't forget to update /etc/fstab, if necessary.

Check the new partition has been added.

# ls
c0d0  c0d0p1  c0d0p2  c0d0p3  c0d0p5

Make the partition a LVM recognised partition.

# pvcreate /dev/cciss/c0d0p5
  Physical volume "/dev/cciss/c0d0p5" successfully created

Add the physical partition to a volume group, this creates vg01 with partition c0d0p5 in the volume group.

# vgcreate vg01 /dev/cciss/c0d0p5
  Volume group "vg01" successfully created

Check the volume group you have created.

#  vgdisplay vg01
  --- Volume group ---
  VG Name               vg01
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  1
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                0
  Open LV               0
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               47.22 GB
  PE Size               4.00 MB
  Total PE              12089
  Alloc PE / Size       0 / 0
  Free  PE / Size       12089 / 47.22 GB
  VG UUID               1IxO0M-RVXu-FaJa-WByR-xdJG-ubtY-iV9mpR

Create the logical volume under the volume group.

# lvcreate -n lvol1 --size 47.22G vg01
  Rounding up size to full physical extent 47.22 GB
  Logical volume "lvol1" created

Create the filesystem on the logical volume.

# mkfs -t ext3 /dev/vg01/lvol1
mke2fs 1.35 (28-Feb-2004)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
6193152 inodes, 12379136 blocks
618956 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
378 block groups
32768 blocks per group, 32768 fragments per group
16384 inodes per group
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
        4096000, 7962624, 11239424

Writing inode tables: done
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 38 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.

Add the file system to the /etc/fstab

# vi /etc/fstab

Add:
/dev/vg01/lvol1 /kickstart ext3 defaults 1 2

Mount the filesystem.

# mkdir /kickstart
# mount /kickstart
# df -k
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/cciss/c0d0p2      5162828   4176164    724404  86% /
none                   8207000         0   8207000   0% /dev/shm
10.150.50.9:/var/crash
                      16523776   5138432  11220128  32% /mnt
/dev/mapper/vg01-lvol1
                      48739168   3863764  42399580   9% /kickstart

Note: Automatically uses the multipath device. Beginning with /dev/mapper