Could not mount disks after Fedora 15 installation...

[atipico]

Please, I`d like to know what happens when with the disks the we include in the installation process of Fedora 15. Obviously, the HD we choose to be the system is entirely formated and reconfigured. But what about the others? What does happen to them? I`m asking this because I have included two brand new disks of 2 TB, one of them with 900.000 files and the other empty, both of them formated with ext4, and completely functional on Fedora 14. However, after the upgrade, in the very first Fedora 15 boot, these disks disapeared from "places", and could not be mounted even via terminal. Opening the Gnome Disk Utility, I found out they had been changed to VLM (instead of ext4) and that they also lost their original lable. I am starting to be concerned because all the data there was important to me. I thank any professional help that I could receive remotely, even if I have to pay for it. Thank you very much.

[MikeTbob]

Hello and Welcome.
First thing you need to do is shutdown the machine and do not run any OS from the hard drive. If you have deleted/formated/fdisked your drives they may be still there but by running an OS, you may overwrite the info you want to save. I suggest that you get any LiveCD, Fedora will work, and boot from that.
Post the output of

fdisk -l

That's a lowercase L not a 1.
If you know for sure they have been formated or deleted then I suggest that you get a copy of Parted Magic, put it on USB drive and boot from that. It has many helpful tools including 2 programs that may help you, Testdisk and Photorec.
programs
TestDisk - CGSecurity
PhotoRec - CGSecurity

Good luck and let us know how it goes.

[atipico]

Thank you for replying. My guess is that the Fedora 15 installation program has overwritten the original filesystem of both 2 TB disks but that all the data is still there.

# fdisk -l

Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders, total 156301488 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: 0x000c7ca1

Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1026047 512000 83 Linux
/dev/sda2 1026048 156301311 77637632 8e Linux LVM

Disk /dev/sdc: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 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: 0x34cd78a8

Device Boot Start End Blocks Id System
/dev/sdc1 2048 3907028991 1953513472 8e Linux LVM

Disk /dev/sdd: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 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: 0x34cd78a8

Device Boot Start End Blocks Id System
/dev/sdd1 2048 3907028991 1953513472 8e Linux LVM

Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 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: 0x000a972c

Device Boot Start End Blocks Id System
/dev/sdb1 2048 1953523711 976760832 8e Linux LVM

Disk /dev/mapper/vg_atipico-lv_swap: 8422 MB, 8422162432 bytes
255 heads, 63 sectors/track, 1023 cylinders, total 16449536 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/vg_atipico-lv_swap doesn't contain a valid partition table

Disk /dev/mapper/vg_atipico-lv_root: 53.7 GB, 53687091200 bytes
255 heads, 63 sectors/track, 6527 cylinders, total 104857600 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/vg_atipico-lv_root doesn't contain a valid partition table

Disk /dev/sde: 1021 MB, 1021313024 bytes
32 heads, 61 sectors/track, 1021 cylinders, total 1994752 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

Device Boot Start End Blocks Id System

Disk /dev/mapper/vg_atipico-lv_home: 4018.1 GB, 4018143232000 bytes
255 heads, 63 sectors/track, 488511 cylinders, total 7847936000 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/vg_atipico-lv_home doesn't contain a valid partition table

[MikeTbob]

Sadly, I think you made a good guess. They look like they are now LVM partitions. I think just outside of professional help, Parted Magic is your best friend here.