Linux Loading HDD process

To view the system's available disk size:

[Email protected] ~]# df-h

Filesystem Size used Avail use% mounted on

/DEV/SDA1 20G 7.3G 12G 39%/

Tmpfs 32G 72K 32G 1%/DEV/SHM

To view the available disks for a server:

[Email protected] ~]# fdisk-l

disk/dev/sdb:8589 MB, 8589934592 bytes

Heads, Sectors/track, 8192 cylinders

Units = Cylinders of 2048 * 1048576 bytes

Sector size (logical/physical): bytes/512 bytes

I/O size (minimum/optimal): bytes/512 bytes

Disk identifier:0x00000000

disk/dev/sda:21.5 GB, 21474836480 bytes

255 heads, Sectors/track, 2610 cylinders

Units = Cylinders of 16065 * 8225280 bytes

Sector size (logical/physical): bytes/512 bytes

I/O size (minimum/optimal): bytes/512 bytes

Disk identifier:0x00026e4e

Device Boot Start End Blocks Id System

/DEV/SDA1 * 1 2611 20970496 Linux

disk/dev/sdc:53.7 GB, 53687091200 bytes

Heads, Sectors/track, 51200 cylinders

Units = Cylinders of 2048 * 1048576 bytes

Sector size (logical/physical): bytes/512 bytes

I/O size (minimum/optimal): bytes/512 bytes

Disk identifier:0x00000000

Format disk/DEV/SDC:

[Email protected] ~]# FDISK/DEV/SDC

Device contains neither a valid DOS partition table, nor Sun, SGI or OSF Disklabel

Building a new DOS disklabel with disk identifier 0xfb75b574.

Changes'll remain in memory only, until the decide to write them.

After that, of course, the previous content won ' t is recoverable.

Warning:invalid flag 0x0000 of partition Table 4 would be a corrected by W (rite)

Warning:dos-compatible mode is deprecated. It ' s strongly recommended to

Switch off the mode (command ' C ') and change display units to

Sectors (Command ' u ').

Command (M for Assist): M--View Help

Command Action

A toggle a bootable flag

b Edit BSD Disklabel

C Toggle the DOS compatibility flag

D Delete a partition

L list known partition types

M Print this menu

n Add a new partition

o Create a new empty DOS partition table

P Print the partition table

Q Quit without saving changes

s create a new empty Sun Disklabel

t change a partition ' s system ID

U Change display/entry units

V Verify the partition table

W Write table to disk and exit

X Extra functionality (experts only)

Command (M for help): N--Add a new partition

Command Action

E Extended

P primary partition (1-4)

P-----Primary Partition

Partition number (1-4): 1----partition No. 1

First cylinder (1-51200, default 1):---defaults from 1

Using Default value 1

Last cylinder, +cylinders or +size{k,m,g} (1-51200, default 51200):--Default 51200 end

Using Default Value 51200

Command (M for help): W---Error on the above changes to disk

The partition table has been altered!

Calling IOCTL () to re-read partition table.

Syncing disks.

format to the appropriate file system type:

To view system disk partitions:

[Email protected] ~]# fdisk-l

disk/dev/sdb:8589 MB, 8589934592 bytes

Heads, Sectors/track, 8192 cylinders

Units = Cylinders of 2048 * 1048576 bytes

Sector size (logical/physical): bytes/512 bytes

I/O size (minimum/optimal): bytes/512 bytes

Disk identifier:0x00000000

disk/dev/sda:21.5 GB, 21474836480 bytes

255 heads, Sectors/track, 2610 cylinders

Units = Cylinders of 16065 * 8225280 bytes

Sector size (logical/physical): bytes/512 bytes

I/O size (minimum/optimal): bytes/512 bytes

Disk identifier:0x00026e4e

Device Boot Start End Blocks Id System

/DEV/SDA1 * 1 2611 20970496 Linux

disk/dev/sdc:53.7 GB, 53687091200 bytes

Heads, Sectors/track, 51200 cylinders

Units = Cylinders of 2048 * 1048576 bytes

Sector size (logical/physical): bytes/512 bytes

I/O size (minimum/optimal): bytes/512 bytes

Disk identifier:0xfb75b574

Device Boot Start End Blocks Id System

/DEV/SDC1 1 51200 52428784 Linux

To format a specific mount partition:

[Email protected] ~]# MKFS.EXT4/DEV/SDC1

MKE2FS 1.41.12 (17-may-2010)

Discarding device Blocks:done

Filesystem label=

OS Type:linux

Block size=4096 (log=2)

Fragment size=4096 (log=2)

Stride=0 blocks, Stripe width=0 blocks

3276800 inodes, 13107196 blocks

655359 blocks (5.00%) reserved for the Super user

First Data block=0

Maximum filesystem blocks=4294967296

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

Writing Inode Tables:done

Creating Journal (32768 blocks): Done

Writing Superblocks and FileSystem accounting Information:--Enter by default

Done

This filesystem would be automatically checked every mounts or

Whichever comes first. Use Tune2fs-c or-i to override.

To create a mounted disk directory:

[Email protected] ~]# Mkdir/data

Mount/DEV/SDC1 to directory/data:

[Email protected] ~]# Mount/dev/sdc1/data

[Email protected] ~]# df-h

Filesystem Size used Avail use% mounted on

/DEV/SDA1 20G 7.3G 12G 39%/

Tmpfs 32G 72K 32G 1%/DEV/SHM

/DEV/SDC1 50G 180M 47G 1%/data

To set up a Linux system boot automatically mount disk:

1) View the disk UUID

[Email protected] ~]# BLKID/DEV/SDC1

/dev/sdc1:uuid= "0c43e879-0e8b-4633-aa7b-d3c5a0e10614" type= "Ext4"

2) Write/etc/fstab file: Add the last line of information, save exit.

[Email protected] ~]# Vim/etc/fstab

#

#/etc/fstab

# Created by Anaconda on Sat June 21 09:11:21 2014

#

# Accessible filesystems, by reference, is maintained under '/dev/disk '

# See mans Pages Fstab (5), Findfs (8), mount (8) and/or Blkid (8) for more info

#

UUID=261E0E16-2332-4716-9AF4-0D0449A53C92/EXT4 Defaults 1 1

Label=yunifyswap swap swap defaults 0 0

TMPFS/DEV/SHM TMPFS Defaults 0 0

Devpts/dev/pts devpts gid=5,mode=620 0 0

Sysfs/sys Sysfs Defaults 0 0

PROC/PROC proc Defaults 0 0

Uuid=0c43e879-0e8b-4633-aa7b-d3c5a0e10614/data EXT4 Defaults 0 2

Linux Loading HDD process