Friday, January 9, 2015

Need Parted partition notes and video link, bit urgent

Hi Friends,
I need  Parted partition notes and video link as I have to create above 2 TB partition.

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Thanks, 

Rajendra Patil
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Mahesh Dongare

<maheshdongare1983@gmail.com>
Sun, Jan 4, 2015 at 10:09 PM
Reply-To: sadhiq-linux-group@googlegroups.com
To: sadhiq-linux-group@googlegroups.com
hi rajendra use below for parted
***************************************** to create GPT partition*****************************************************************
How can I create a disk partition on a disk that is greater than 2TB in size on Red Hat Enterprise Linux?
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0 Issue
•I'm trying to create a partition on my 5.4TB disk with fdisk and the partitions are not the correct size.
Environment

Red Hat Enterprise Linux including :
?Red Hat Enterprise Linux 3
?Red Hat Enterprise Linux 4
?Red Hat Enterprise Linux 5
?Red Hat Enterprise Linux 6

Disk or LUN exceeding 2TB in size
,Resolution

The parted tool supports GPT disk labels which can be used on disks larger than 2TB.
The example below demonstrates how to create a 5.4TB partition:
1.
Use the parted tool to access the partition table of the device:
# parted /dev/sdj
Using /dev/sdj
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted)
2.
Once at the parted prompt, create a GPT label on the disk (Note: This will remove any existing partition table and partitions on the device):
(parted) mklabel
Warning: The existing disk label on /dev/sdj will be destroyed and all data on this disk will be lost. Do you want to continue?
Yes/No? Yes
New disk label type?  [gpt]? gpt
(parted)
3.
Use the print command to show the size of the disk as reported by parted.  We need this later:
(parted) print
Model: Linux device-mapper (dm)
Disk /dev/sdj: 5662310.4MB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number  Start  End  Size  File system  Name  Flags
4.
Create a primary partition on the device.  In this example, the partition will encompass the entire disk (using size from the step above):
(parted) mkpart primary 0 5662310.4MB
5.
Unlike fdisk, you do not have to write out the partition table changes with parted.  Display your new partition and quit.
(parted) print
Model: Linux device-mapper (dm)
Disk /dev/mapper/VolGroup00-gpttest: 5662310.4MB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number  Start   End          Size         File system  Name     Flags
 1      17.4kB  5662310.4MB  5662310.4MB               primary
(parted) quit
Information: Don't forget to update /etc/fstab, if necessary.
6.
Now you can create a filesystem on the device /dev/sdj1.
Root Cause
•The fdisk command only supports the legacy MBR partition table format (also known as msdos partition table) ?MBR partition table do not support disks greater than
2.1TB, and therefore fdisk is also unable to create partition tables on these devices.
?Note that some older versions of fdisk may permit a larger size to be created but the resulting partition table will be invalid.
•The parted command can create disk labels using MBR (msdos), GUID Partition Table (GPT), SUN disk labels and many more types. ?The GPT disk label overcomes many of
the limitations of the DOS MBR including restrictions on the size of the disk, the size of any one partition and the overall number of partitions.
?Note that booting from a GPT labelled volume requires firmware support and this is not commonly available on non-EFI platforms (including x86 and x86_64

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