Linux partition table - Revision history

Pio2pio: /* Create a single optimal partition */

2020-07-18T08:48:00Z

Create a single optimal partition

← Older revision		Revision as of 10:48, 18 July 2020
Line 50:		Line 50:
	= Create a single optimal partition =		= Create a single optimal partition =
	This can be useful for provisioning EBS disks on AWS instances.		This can be useful for provisioning EBS disks on AWS instances.
			<source lang=bash>
	;Provision an entire disk		# Provision an entire disk
	parted -a optimal /dev/xvdb		parted -a optimal /dev/xvdb
	(parted) mklabel msdos ~~#must be one of these supported disk labels: bsd, loop (raw disk access), gpt, mac, msdos, pc98, sun. “disk label” same thing as partition table, partition map~~		partition table, partition map
			(parted) mklabel msdos
	Warning: The existing disk label on /dev/xvdb will be destroyed and all data on this disk will be lost. Do you want to continue?		Warning: The existing disk label on /dev/xvdb will be destroyed and all data on this disk will be lost. Do you want to continue?
	Yes/No? Yes		Yes/No? Yes
	(parted) mkpart primary ext2 0% 100%		(parted) mkpart primary ext2 0% 100%
	(parted) set 1 lvm on		(parted) set 1 lvm on
			# \| 'mklabel msdos' must be one of these supported disk labels:
			# \| bsd, loop (raw disk access), gpt, mac, msdos, pc98, sun. “disk label” same thing as

	;Create a filesystem (format disk)		# Create a filesystem (format disk)
	sudo mkfs.ext4 /dev/xvdb1		sudo mkfs.ext4 /dev/xvdb1

	;Mount		# Mount
	sudo mount /dev/xvdb1 -f ext4 /mnt/xvdb1		sudo mount /dev/xvdb1 -f ext4 /mnt/xvdb1
			</source>

	= Sync disk after partition altering =		= Sync disk after partition altering =

Pio2pio: /* Create a single optimal partition */

2020-07-18T08:39:20Z

Create a single optimal partition

← Older revision		Revision as of 10:39, 18 July 2020
Line 64:		Line 64:
	;Mount		;Mount
	sudo mount /dev/xvdb1 -f ext4 /mnt/xvdb1		sudo mount /dev/xvdb1 -f ext4 /mnt/xvdb1

			= Sync disk after partition altering =
			The OS must be "forced" to re-read the partition table once changes have been done. A reboot does this and hence you see fdisk changes after a reboot.
			<source lang=bash>
			$ partprobe
			# partprobe is part of parted package
			</source>

	= Permanent mount options /etc/fstab =		= Permanent mount options /etc/fstab =

Pio2pio: /* Permanent mount options /etc/fstab */

2016-02-26T16:27:37Z

Permanent mount options /etc/fstab

← Older revision		Revision as of 18:27, 26 February 2016
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	= Permanent mount options /etc/fstab =		= Permanent mount options /etc/fstab =
	fstab is a configuration file that contains information of all the partitions and storage devices in your computer. /etc/fstab contains information of where your partitions and storage devices should be mounted and how.		fstab is a configuration file that contains information of all the partitions and storage devices in your computer. /etc/fstab contains information of where your partitions and storage devices should be mounted and how.
	COL 1 COL 2 COL 3 COL 4 COL 4 5		COL 1 COL 2 COL 3 COL 4 COL 5 6
	\|----------------------\|-------------\|-------\|-------------------------\|-\|-\|		\|----------------------\|-------------\|-------\|-------------------------\|-\|-\|
	LABEL=cloudimg-rootfs / ext4 defaults,discard 0 0		LABEL=cloudimg-rootfs / ext4 defaults,discard 0 0

Pio2pio: /* Permanent mount options /etc/fstab */

2014-12-29T20:08:32Z

Permanent mount options /etc/fstab

← Older revision		Revision as of 22:08, 29 December 2014
Line 90:		Line 90:
	* 5th column - dump - backup utility, advanced option, '''0''' means dump ignores the filesystem		* 5th column - dump - backup utility, advanced option, '''0''' means dump ignores the filesystem
	* 6th column - fsck - determine in which order the file systems should be checked, '''0''' means ''fsck'' won't chech the file system		* 6th column - fsck - determine in which order the file systems should be checked, '''0''' means ''fsck'' won't chech the file system

			= References =
			* [[Linux USB]]

Pio2pio: /* Create a single optimal partition */

2014-12-29T20:06:36Z

Create a single optimal partition

← Older revision		Revision as of 22:06, 29 December 2014
Line 64:		Line 64:
	;Mount		;Mount
	sudo mount /dev/xvdb1 -f ext4 /mnt/xvdb1		sudo mount /dev/xvdb1 -f ext4 /mnt/xvdb1

			= Permanent mount options /etc/fstab =
			fstab is a configuration file that contains information of all the partitions and storage devices in your computer. /etc/fstab contains information of where your partitions and storage devices should be mounted and how.
			COL 1 COL 2 COL 3 COL 4 COL 4 5
			\|----------------------\|-------------\|-------\|-------------------------\|-\|-\|
			LABEL=cloudimg-rootfs / ext4 defaults,discard 0 0
			/dev/fd0 /media/floppy auto rw,noauto,user,sync 0 0
			/dev/cdrom /media/cdrom auto ro,noauto,user,exec 0 0
			/dev/xvdb1 /mnt/xvdb1 ext4 defaults 0 0

			* 1st column - device
			* 2nd column - default mount point. It tells where to mount device <code>mount /dev/fd0</code> if mounting point is not specified
			* 3rd column - filesystem type. Value '''auto''' means that the file system type is detected automatically usually used for /dev/fd0 and /dev/cdrom0 as the type may vary
			* 4th column - mount options
			** auto - device will be mounted automatically at boot or when you issue <tt>mount -a</tt>
			** noauto - device needs to be mouted explicitly
			** user - allows normal user mount device
			** nouser - only root can mount the device
			** exec - lets you execute binaries; it is '''default option'''
			** noexec - doesn't allow execute binaries
			** ro - mount the file system read-only
			** rw - mount as read-write filesystem; it is '''default option'''
			** sync and async - check wiki as it is more advanced; '''async''' is the '''default'''
			** defaults - uses the default options that are rw, suid, dev, exec, auto, nouser, and async
			* 5th column - dump - backup utility, advanced option, '''0''' means dump ignores the filesystem
			* 6th column - fsck - determine in which order the file systems should be checked, '''0''' means ''fsck'' won't chech the file system

Pio2pio: Created page with "The headline it should be '''Working with Partition Table in Linux''' but Google search phrases take precedences as these are more human language much often than we think. Vot..."

2014-12-29T19:20:31Z

Created page with "The headline it should be '''Working with Partition Table in Linux''' but Google search phrases take precedences as these are more human language much often than we think. Vot..."

New page

The headline it should be '''Working with Partition Table in Linux''' but Google search phrases take precedences as these are more human language much often than we think. Vote if you disagree!

= List partitions =
'''sudo blkid -o list''' # read more http://linux.101hacks.com/unix/blkid/
device fs_type label mount point UUID
----------------------------------------------------------------------------------
/dev/sda1 ext4 / 4a5d5028-062d-4a4b-9d1a-c4df9708ef86
/dev/sda5 swap <swap> bc8348c5-c188-4627-9df4-32bba94c9c8b

'''lsblk'''
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 55.9G 0 disk
├─sda1 8:1 0 54.4G 0 part /
├─sda2 8:2 0 1K 0 part
└─sda5 8:5 0 1.5G 0 part [SWAP]

'''sudo fdisk -l'''
Disk /dev/sda: 60.0 GB, 60011642880 bytes
255 heads, 63 sectors/track, 7296 cylinders, total 117210240 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000f12f1

Device Boot Start End Blocks Id System
/dev/sda1 * 2048 114083839 57040896 83 Linux
/dev/sda2 114085886 117209087 1561601 5 Extended
/dev/sda5 114085888 117209087 1561600 82 Linux swap / Solaris

'''sudo sfdisk -ls'''
/dev/sda: 58605120

Disk /dev/sda: 7296 cylinders, 255 heads, 63 sectors/track
Warning: extended partition does not start at a cylinder boundary.
DOS and Linux will interpret the contents differently.
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0

Device Boot Start End #cyls #blocks Id System
/dev/sda1 * 0+ 7101- 7102- 57040896 83 Linux
/dev/sda2 7101+ 7295- 195- 1561601 5 Extended
/dev/sda3 0 - 0 0 0 Empty
/dev/sda4 0 - 0 0 0 Empty
/dev/sda5 7101+ 7295- 195- 1561600 82 Linux swap / Solaris

*'''-l''' : List the partitions of a device.
*'''-s''' : List the size of a partition.
*'''-u''' or -uS or -uB or -uC or -uM : Accept or report in units of sectors (blocks, cylinders, megabytes, respecpively). The default is cylinders, at least when the geometry is known

= Create a single optimal partition =
This can be useful for provisioning EBS disks on AWS instances.

;Provision an entire disk
parted -a optimal /dev/xvdb
(parted) mklabel msdos #must be one of these supported disk labels: bsd, loop (raw disk access), gpt, mac, msdos, pc98, sun. “disk label” same thing as partition table, partition map
Warning: The existing disk label on /dev/xvdb will be destroyed and all data on this disk will be lost. Do you want to continue?
Yes/No? Yes
(parted) mkpart primary ext2 0% 100%
(parted) set 1 lvm on

;Create a filesystem (format disk)
sudo mkfs.ext4 /dev/xvdb1

;Mount
sudo mount /dev/xvdb1 -f ext4 /mnt/xvdb1