Resize & Create Partitions in Debian

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Resize a Current Partition

  • A boot disk or Live CD, or Rescue System is required to run the commands below

I needed to shrink a 135gb ext3 partition to 35gb, leaving space for another partition.

parted  //the debian program

The process:

parted /dev/sda

p //print partitions

resize #   // where # is current partition number to be resized, e.g. "2" where partition is /dev/sda2
Start? [blah]  //should be ok by defauly
End? [Type in New End of Partition]

That should do it.

Create a Partition

Once the above resizing is done, and there unallocated space on the disks, type - cfdisk /dev/sda to see partitions. A new partition can be CREATED from the now available free space.

Choose the TYPE of the Partition required - ext3 or RAID etc.

In order to format the new partition created using cfdisk (above):

mke2fs -j /dev/sda3

That should do it. cfdisk will show the format and partitions for you to check.

mount /dev/sda3 /mnt/newfolder //will mount it.

Problems, Pitfalls, and Solutions

1. The space you shrink to - make sure to allow PLENTY of room for the filesystem!!!! 35gb turned out to leave 32gb!!

2. Now - if parted gives the following error:

No Implementation: This ext2 filesystem has a rather strange layout!  Parted can't resize this (yet).

You need to get the latest "testing" version of parted - v. 1.7 Debian sarge using 1.6. You will need to change /etc/apt/sources.list to move to testing (on rescue system) and upgrade. The new version of parted should work fine.



Sources:

http://www.linuxquestions.org/questions/showthread.php?t=360042

http://www.linuxforums.org/forum/debian-linux-help/49045-how-format-hard-disk.html

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