View Full Version : [ubuntu] ext3 formatted usb hard drive not visible

January 23rd, 2009, 12:52 AM
I formatted a 500Gbyte hard drive with gparted as ext3.
The formatted drive does not show up in the gui (places-computer)however.
Do I have to reboot before it will show up?
I'd rather not if possible, as I'm in the middle of downloading with emule.
Anything I am missing?

January 23rd, 2009, 01:08 AM
What's the output of this command from a terminal?

Applications -> Accessories -> Terminal

sudo fdisk -l

January 23rd, 2009, 01:27 AM
If you've just formatted the drive, open up gparted again and hit Ctrl+R and that should refresh the new drive for you and it should appear on your desktop.

January 23rd, 2009, 01:28 AM
Thanks for the reply. I found a folder mnt where it showed up as being mounted but there was a folder called lost and found with the 'unreadable symbol associated with it.

I used gparted again to unallocate the drive, then I unmounted it.

I next used a terminal and did the following:

bob@bob-desktop:~$ sudo mkfs.ext3 /dev/sdc1
mke2fs 1.41.3 (12-Oct-2008)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
30531584 inodes, 122096000 blocks
6104800 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=0
3727 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,

Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 27 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.


bob@bob-desktop:~$ sudo fdisk -l

Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xffdcf748

Device Boot Start End Blocks Id System
/dev/sda1 * 1 9327 74919096 83 Linux
/dev/sda2 9328 9729 3229065 5 Extended
/dev/sda5 9328 9729 3229033+ 82 Linux swap / Solaris

Disk /dev/sdc: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x44fdfe06

Device Boot Start End Blocks Id System

Now it shows up in the gui, but if I click on it I see a lost and found folder that has an unreadable designation and constitutes 435Gbytes of the disk??

January 23rd, 2009, 01:33 AM
first you need to give yourself ownwership and permissions of the drive


sudo chown -R <your username>:<your username> /media/disk
sudo chmod -R 755 /media/disk

then to remove allocated root space

sudo tune2fs -m 0 /dev/sdc1

no < > around your user name ... e.g. dean:dean

hope this helps

January 23rd, 2009, 01:54 AM
OK thanks.

Now everything seems normal except I still see this 'lost and found' folder.
The size of the drive and the folder seem to coincide and it is readable.
Can I simply delete the folder? Where did it come from?

Last question.
If I plug in another external hard drive to format it for use with ubuntu, How do I properly take care of the ownership issue first so as to avoid an end run around?


January 23rd, 2009, 02:04 AM
the lost+found folder is part of ext3, every drive/partition formatted with ext2/3 has one.

you can only set permissions for a drive after you've formatted it, even if you've formatted it previously and changed ownership. all drives that have just been formatted are owned by root until you change it.

January 23rd, 2009, 02:10 AM
Glad I waited for your response then.
Thanks loads.

January 24th, 2009, 11:02 AM
I finally located an article that proved useful in filling in the holes in my knowledge..