To find unpartitioned harddiskspace in Centos

abbas_sw · 01-15-2010, 12:27 AM

Dear all

Abbas here new user to linux.

Can any one help me how to know the unparitioned disk space in centos

Thankz!!!!!!!!!!!

nileshgr · 01-15-2010, 04:49 AM

Open terminal and type as root-

Code:

parted /dev/<hard-disk>

It will give you a prompt in which you have to type 'p'.

You may have to install parted if its not there.

ozanbaba · 01-15-2010, 05:01 AM

or more generic solution is using fdisk

go root
fdisk /dev/$HDD

then type p

abbas_sw · 01-15-2010, 05:25 AM

Quote:

Originally Posted by nilesh.3892

Open terminal and type as root-

Code:

parted /dev/<hard-disk>

It will give you a prompt in which you have to type 'p'.

You may have to install parted if its not there.

Thanks sir

but still 1 confusion

we have to manually do calculation for that unpartitioned space
as it shows full harddisk space and the partitioned space separately.

is there is any command which show exactly unpartitioned space.

Thankzzzzzzzzzzzzz

ozanbaba · 01-15-2010, 05:44 AM

i'm not remembering perfectly now, i don't access to my computer to check but p command to fdisk should give you free space, too.

nileshgr · 01-15-2010, 11:15 AM

Quote:

Originally Posted by ozanbaba

i'm not remembering perfectly now, i don't access to my computer to check but p command to fdisk should give you free space, too.

No it doesn't. It gives blocks. I was about to post the same but tested it first.

nileshgr · 01-15-2010, 11:19 AM

Quote:

Originally Posted by abbas_sw

Thanks sir

but still 1 confusion

we have to manually do calculation for that unpartitioned space
as it shows full harddisk space and the partitioned space separately.

is there is any command which show exactly unpartitioned space.

Thankzzzzzzzzzzzzz

I don't think so. You may find some GUI tool if it exists. Or you've to write a script to process the information outputted by parted.

ozanbaba · 01-15-2010, 12:15 PM

Quote:

Originally Posted by nilesh.3892

No it doesn't. It gives blocks. I was about to post the same but tested it first.

blocks x block size = space

however block size is usually 4k[1], it is a little too much for normal users to find block size.

[1] fs people say that using same size of page size of the hardware is right time to do as it fastens the memory work. hence 4k number is PC specific.

onebuck · 01-15-2010, 12:19 PM

Hi,

Welcome to LQ!

You could use 'cfdisk /dev/your_device' to show all partitions and available space for expansion if there is any. Note that '/dev/your_device' can be found by 'fdisk -l' to show the disk(s) information. You should 'man cfdisk'.

nileshgr · 01-16-2010, 10:39 AM

Quote:

Originally Posted by ozanbaba

blocks x block size = space

however block size is usually 4k[1], it is a little too much for normal users to find block size.

[1] fs people say that using same size of page size of the hardware is right time to do as it fastens the memory work. hence 4k number is PC specific.

Is 4k so common ? I am running Arch Linux. My block size is 512B.

@onebuck, thanks for the info.

ozanbaba · 01-16-2010, 11:36 AM

Quote:

Originally Posted by nilesh.3892

Is 4k so common ? I am running Arch Linux. My block size is 512B.

@onebuck, thanks for the info.

ik depends on way too much things, from file system, hdd, arch to how the engineer was feeling when he designed the hardware