topic Re: Extend a filesystem in Operating System - Linux

Extend a filesystem

Whitehorse_1 — Wed, 28 Nov 2007 14:58:53 GMT

Admins,

I'm a fresh bee in Linux. I would like to extend a filesystem which looks like,

/dev/silo/c0d0p2 66054908 57574968 5124548 92% /home/rpt

Linux atdbs05 2.4.21-40.ELsmp #1 SMP Thu Nov 28 14:15:39 EST 2007 i686 i686 i386 GNU/Linux

Could someone throw some lights, Thxs WH

Re: Extend a filesystem

Ivan Ferreira — Wed, 28 Nov 2007 16:36:40 GMT

Suddenly, this appears to be one fixed partition on a hardware RAID device (or similar). You can only extend partitions under the control of LVM. In this case, you are not using LVM.

Probably you need to backup, destroy, resize, restore your partion. If you do that, ensure to use LVM now.

There may be workarounds to this, but is dangerous, you can loss your data.

Re: Extend a filesystem

skt_skt — Wed, 28 Nov 2007 17:07:19 GMT

identify the disk the FS use, see the free space, create a larger partition copy the data, and mount on new partiton. (Assuming there is no lvm)

Re: Extend a filesystem

Jeeshan — Thu, 29 Nov 2007 00:41:57 GMT

you can try this out

Here are the steps involved for EXPANDING a filesystem & partition:
1. Backup your data.
2. Print the output from the fdisk -l command on a printer, or write down the details by hand. This is in case you need to restore your partition table to it's previous state.
3. Make note of the cylinder size of the disk in bytes, and call this number C. For example, from the following output you would note C = 8225280

Disk /dev/hda: 40.0 GB, 40000000000 bytes
255 heads, 63 sectors/track, 4863 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

4.
5. Run the command tune2fs -l where represents the device file of the partition which contains the filesystem you are going to resize.
6. Make note of the following values from the above output: Block count, Block Size, and Free blocks. Label the Block Count T, the Block Size K, and Free Blocks F.
7. Reboot the system into rescue mode. Do this by booting off of the first CD and typing linux rescue at the boot: prompt.
8. DO NOT mount any partitions, especially those on the device containing filesystems you are going to resize.
9. Take the number of bytes you would like to add to the filesystem and label it Z.
10. Divide Z by C, rounding any fraction up to the next whole number or add 1 if the result is zero. Call this resulting number N.
11. Calculate ((N*C)/K) and call the result X.
12. Add X to T calling the result R.
13. Execute the command e2fsck -fy .
14. Enter the fdisk utility with the command fdisk .
15. Display the current partition table with the p command.
16. Use the d command to delete the partition the resized filesystem is on.
17. Use the n command to create a new partition.
18. For the starting cylinder, specify the same value as before. (You did print out the original partition table in step 2, right?)
19. For the ending cylinder, specify the original ending cylinder Plus N.
20. Use the w command to save the new partition table.
21. Run the command e2fsck -y to verify that the filesystem is intact.
22. Execute the command resize2fs -f
Note: you must use -f to grow filesystem otherwise it will refuse the command.
23. Assuming the resize was successful, run the command e2fsck -y to verify that the filesystem is still intact. If it it checks out, your done! If it fails then you most likely have lost the data on this filesystem.

Re: Extend a filesystem

Jeeshan — Thu, 29 Nov 2007 00:43:57 GMT

please use the the above mentioned steps in test machine then follow this in live.

Re: Extend a filesystem

Abhirama.M.V — Fri, 30 Nov 2007 04:37:23 GMT

pvcreate
pvdisplay
lvcreste
lvdispay
these are all the commands the must be used to creste the volume and then makefilesystem using
mkfs command and filename. for more refernce log on to
//tldp.org/HOWTO/LVM-HOWTO/index.html