Filled external hard drive appears empty in nautilus after 12.10 reinstall

[Paco009]

I recently did a re-install of Ubuntu 12.10 on my computer backing up everything important onto a 1TB WD My Passport. Everything copied properly and the re-install worked fine. However now when I insert and mount my backup drive to retrieve my vital files, nautilus shows the drive as completely empty. Under the drive's properties it says 533.4 GB are used and 466.3 GB are free, but I cannot access my 533 GB of files...

The properties window also says the filesystem type is msdos, which might have something to do with it, but I'm not sure... I thought that I had formatted the drive as a Master Boot Record FAT drive/partition.

I booted into a live USB of Ubuntu 12.10 to see if I could access anything under that for some reason, but unsurprisingly, everything was exactly the same as previously described.

The drive in question was completely wiped and re-formatted in my previous installation of Ubuntu which is also the OS I used to copy all of my vital files afterwards.

Any help would be hugely appreciated. I'll happily provide any additional information needed, just let me know what's helpful. I absolutely HAVE to be able to recover the files on this drive, PLZ HELP.

[Bashing-om]

Paco009; Hi !

The fact that the file manager does not see the file system indeed does not bode well for a happy outcome. Nor formatting the drive as fat32;

If this is a FAT32 filesystem, there is a 4GB limit on files being stored. You'll need to reformat to NTFS.
per ==> http://support.microsoft.com/default...b;en-us;314463

But, to address the issue at hand, one may look at what there is to work with/from; terminal commands from a liveCD:

sudo fdisk -lu
sudo parted -l 
sudo parted /dev/sda unit s print

Will give us a starting place.

try'n to help

[darkod]

msdos or Master Boot Record is type of the partition table. You can still have partitions with filesystem that is FAT32, ext4, etc. It's not very wise to keep using FAT32 these days, especially since ubuntu supports NTFS very good. So, if you need an ext disk to be readable by windows too, format it as NTFS. If you want it for ubuntu only, you can also do ntfs or you can go with ext4.

In any case, as suggested above, first post the:
sudo parted -l

and lets see what the output is.

[dino99]

be sure to be logged as "user" not "root"

related question: http://askubuntu.com/questions/97652...ead-only-fat32

[Paco009]

rebeccca@Mariposa:~$ sudo fdisk -lu

Disk /dev/sda: 750.2 GB, 750156374016 bytes
255 heads, 63 sectors/track, 91201 cylinders, total 1465149168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0007d8c9

Device Boot Start End Blocks Id System
/dev/sda1 * 2048 499711 248832 83 Linux
/dev/sda2 501758 1465147391 732322817 5 Extended
/dev/sda5 501760 1465147391 732322816 83 Linux

Disk /dev/mapper/sda5_crypt: 749.9 GB, 749896466432 bytes
255 heads, 63 sectors/track, 91169 cylinders, total 1464641536 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/sda5_crypt doesn't contain a valid partition table

Disk /dev/mapper/ubuntu-root: 743.6 GB, 743562018816 bytes
255 heads, 63 sectors/track, 90399 cylinders, total 1452269568 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/ubuntu-root doesn't contain a valid partition table

Disk /dev/mapper/ubuntu-swap_1: 6333 MB, 6333399040 bytes
255 heads, 63 sectors/track, 769 cylinders, total 12369920 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/ubuntu-swap_1 doesn't contain a valid partition table

Disk /dev/mapper/cryptswap1: 6333 MB, 6333399040 bytes
255 heads, 63 sectors/track, 769 cylinders, total 12369920 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xbba29eff

Disk /dev/mapper/cryptswap1 doesn't contain a valid partition table

Disk /dev/sdb: 1000.2 GB, 1000170586112 bytes
255 heads, 63 sectors/track, 121597 cylinders, total 1953458176 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000eb839

Device Boot Start End Blocks Id System
/dev/sdb1 63 1953455804 976727871 c W95 FAT32 (LBA)



rebeccca@Mariposa:~$ sudo parted -l
Model: ATA TOSHIBA MK7575GS (scsi)
Disk /dev/sda: 750GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number Start End Size Type File system Flags
1 1049kB 256MB 255MB primary ext2 boot
2 257MB 750GB 750GB extended
5 257MB 750GB 750GB logical


Model: WD My Passport 07A8 (scsi)
Disk /dev/sdb: 1000GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number Start End Size Type File system Flags
1 32.3kB 1000GB 1000GB primary fat32 lba


Model: Linux device-mapper (crypt) (dm)
Disk /dev/mapper/cryptswap1: 6333MB
Sector size (logical/physical): 512B/512B
Partition Table: loop

Number Start End Size File system Flags
1 0.00B 6333MB 6333MB linux-swap(v1)


Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/ubuntu-root: 744GB
Sector size (logical/physical): 512B/512B
Partition Table: loop

Number Start End Size File system Flags
1 0.00B 744GB 744GB ext4


Error: /dev/mapper/ubuntu-swap_1: unrecognised disk label

Error: /dev/mapper/sda5_crypt: unrecognised disk label




rebeccca@Mariposa:~$ sudo parted /dev/sda unit s print
Model: ATA TOSHIBA MK7575GS (scsi)
Disk /dev/sda: 1465149168s
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number Start End Size Type File system Flags
1 2048s 499711s 497664s primary ext2 boot
2 501758s 1465147391s 1464645634s extended
5 501760s 1465147391s 1464645632s logical

[darkod]

Are you using encryption? You never mentioned that but according to the output it seems you do.

I haven't worked with encryption, is it possible that if you had encryption also on your old OS when you copied files to the ext hdd they were encrypted, and now the new OS has new encryption which doesn't match. So it shows there are 533GB used but not showing them to you.

You have to be really, really careful with encryption and know what you are doing. I don't, so I can't help much more.

[Paco009]

The old 12.10 installation might have had an encrypted home folder setup as one of the options during the initial install, but that was it. The external drive is brand new and was never encrypted. The new installation has an encrypted home folder and main drive all also created using the standard options available within the Ubuntu live install. As far as I know none of these should affect my ability to access the drive, but who knows.

It might also be helpful to mention that I'm unable to create any new files or folders within the drive using nautilus. Not sure if it thinks the drive's read only or that I don't have adequate permission or what...

[oldfred]

It looks like fdisk would not show the external but parted did show it.

Can you see it from Windows? As you have to use Windows to run chkdsk on Windows formatted partitions. Repairs to Windows formatted partitions have to be from Windows.

Again as stated before, chkdsk may not work or will take a lot longer on FAT32 as it does not have a journal and large file support like NTFS.

Always run chkdsk and run again until there are no errors, that may be all that is required
chkdsk c: /b
/b includes /r
http://technet.microsoft.com/en-us/l...=ws.10%29.aspx

[darkod]

It looks like fdisk would not show the external but parted did show it.

fdisk does show it Fred. It's in bold too. It shows the 1TB disk with a single FAT32 partition sdb1.

[Bashing-om]

Paco009;

I am in the same boat with darkod. - no experience or knowledge in respect to encrypted partitions. I am more than willing to assist in any manner, but, I am presently clueless how to proceed // I would think that until the partitions can be decrypted we are stuck.

'tween a rock and a hard place