Create partition table and format disk (Centos 6) Softlayer

At SoftLayer i created server with two hard disks: primary (you can choose size max 100GB) and secondary (you can choose size max 300GB)

• df doesn't show the secondary disk, you need to create partition, format and mount disk first

[root@server me]# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/xvda2           103108896  91059600   6811588  94% /
tmpfs                  1987292         0   1987292   0% /dev/shm
/dev/xvda1               99150     49491     44539  53% /boot

• to see all disks run fdisk

[root@server me]# fdisk -l

Disk /dev/xvdb: 2147 MB, 2147483648 bytes
255 heads, 63 sectors/track, 261 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: 0x00025cdb

    Device Boot      Start         End      Blocks   Id  System
/dev/xvdb1               1         261     2096451   82  Linux swap / Solaris

Disk /dev/xvdc: 322.1 GB, 322122547200 bytes
255 heads, 63 sectors/track, 39162 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

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

Disk /dev/xvda: 107.4 GB, 107374182400 bytes
255 heads, 63 sectors/track, 13054 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: 0x00000cb5

    Device Boot      Start         End      Blocks   Id  System
/dev/xvda1   *           1          13      102400   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/xvda2              13       13055   104754176   83  Linux

primary disk is  /dev/xvda, and secondary is /dev/xvdc

run parted to create partition table, run mkfs to format

• you will get into parted shell, run mklabel to set disk label (msdos for linux)

[root@server me]# parted /dev/xvdc mklabel msdos
Warning: The existing disk label on /dev/xvdc will be destroyed and all data on this disk will be lost. Do you want to continue?
Yes/No? Yes
Information: You may need to update /etc/fstab.

• run mkpart to create partition start from position 0 until end of disk -1, for ext3 filesystem

[root@server me]# parted /dev/xvdc mkpart
Partition type?  primary/extended? primary
File system type?  [ext2]? ext3
Start? 0
End? -1
Warning: The resulting partition is not properly aligned for best performance.
Ignore/Cancel? Ignore
Information: You may need to update /etc/fstab.

• run fdisk to see partition num, now we see all disk normal at fdisk, but df still doesn't show secondary disk

[root@server me]# fdisk -l

Disk /dev/xvdb: 2147 MB, 2147483648 bytes
255 heads, 63 sectors/track, 261 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: 0x00025cdb

    Device Boot      Start         End      Blocks   Id  System
/dev/xvdb1               1         261     2096451   82  Linux swap / Solaris

Disk /dev/xvdc: 322.1 GB, 322122547200 bytes
255 heads, 63 sectors/track, 39162 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: 0x0003cf5d

    Device Boot      Start         End      Blocks   Id  System
/dev/xvdc1               1       39163   314571823+  83  Linux

Disk /dev/xvda: 107.4 GB, 107374182400 bytes
255 heads, 63 sectors/track, 13054 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: 0x00000cb5

    Device Boot      Start         End      Blocks   Id  System
/dev/xvda1   *           1          13      102400   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/xvda2              13       13055   104754176   83  Linux

[root@server me]# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/xvda2           103108896  91019892   6851296  93% /
tmpfs                  1987292         0   1987292   0% /dev/shm
/dev/xvda1               99150     49491     44539  53% /boot

• format partition xvdc1 by mkfs

[root@server me]# mkfs.ext3 /dev/xvdc1
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
19660800 inodes, 78642955 blocks
3932147 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
2400 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
        4096000, 7962624, 11239424, 20480000, 23887872, 71663616

Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 30 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.

• mount disk

[root@server me]# mkdir /mnt/xvdc1
[root@server me]# mount /dev/xvdc1 /mnt/xvdc1

• add mounted disk to fstab

[root@server me]# vim /etc/fstab

....

/dev/xvdc1              /mnt/xvdc1              ext3    defaults        0 0

• check

[root@server me]# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/xvda2           103108896  63571080  34300108  65% /
tmpfs                  1987292         0   1987292   0% /dev/shm
/dev/xvda1               99150     49491     44539  53% /boot
/dev/xvdc1           309636140    195548 293712004   1% /mnt/xvdc1

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