4) Disk Management

DISK MANAGEMENT

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• Some location point for diskpart in Linux

                   /dev/sd →  for SATA or iSCSI  hardisk.

                   /dev/hd → for IDE harddisk.

 Note: In the last sd/hd , “a, b, c or d” will be written then show hard disk name.

*   a → First device (Primary master)

*   b → Secondry device (Primary master)

*   c → Third device (Secondry master)

*   d → Fourth device (Secondry master)

                                      #  fdisk ɸ -l → show add hardisk.

                      #  reboot or init ɸ 6 → for restart to system.

                      #  partprobe → for update.

 Disk partition action point

     #        fdisk ɸ /dev/sdb ↵

Command action

·         Press “a”  → toggle a bootable flag

·         Press “b” →  edit bsd disklabel

·         Press  “c” → toggle the dos compatibility flag

·         Press  “d” → delete a partition

·         Press “l” → list known partition types

·         Press “m” → print this menu

·         Press “n” → add a new partition

·         Press “o” → create a new empty DOS partition table

·         Press “p” → print the partition table

·         Press “q” → quit without saving changes

·         Press “s” → create a new empty Sun disklabel

·         Press  “t” → change a partition's system id

·         Press  “u” → change display/entry units

·         Press “v” → verify the partition table

·         Press “w” → write table to disk and exit

·         Press “x” → extra functionality (experts only)

 Format partition

#        mkf.ext +4 ɸ /dev/sdb1 ↵ (for  format partition)

#        mkdir ɸ / (directory name) ↵

#        mount ɸ /dev/sdb1/ ɸ (directory name) ↵   (for mounting to partition name) 

#        df ɸ - Th ɸ /(directory name) ↵   (show create new partition)

 Create volume

 Create physical volume

#        pvcreate ɸ /dev/sdb ɸ /dev/sdc ɸ /dev/sdd ↵

#        pvs ↵

#        pvsdisplay ↵

 Create group volume

#        vgcreate ɸ group name ɸ /dev/sdb ɸ /dev/sdc ɸ /dev/sdd ↵

#        vgs ↵

#        vgsdisplay ↵

 Create logical volume

#        lvcreate ɸ -L ɸ +2g ɸ Vg1 ↵

#        lvs ↵

#        lvdisplay ↵

Resize volume

  Shrink volume

#        lvreduce ɸ - L ɸ - 1G ɸ /dev/vg1/lvolo ↵

#        lvs ↵

#        lvdisplay ↵

 Extended volume

#        lvextend ɸ - L ɸ +2G ɸ /dev/vg1/lvolo ↵

#        lvs ↵

#        lvdisplay ↵

  Reset root password

·         Restart system

·         Press “Esc” key during boot process.

·         Press “E” to edit the grub file.

·         Search “rhgb ɸ quit” and replace it with “init = /bin/bash”.

·         Press ctrl + X.

·         # mount ɸ - o ɸ remount,rw ɸ / ↵

·         # passwd ɸ root ↵

·         (type new password) ↵

·         # exit ↵