Part of hard disk disappeared after installing Fedora 12?

[fedora]

check your LVM settings, apparently, the partition mounted as / is from 
an LVM construct.
pvdisplay
vgdisplay
lvdisplay

suomi

On 2009-11-23 21:19, M. Fioretti wrote:
>
> On Mon, November 23, 2009 9:13 pm, M. Fioretti wrote:
>> I have pasted below the outputs of fdisk -l and mount. Please don't
>> hesitate to suggest more commands, ask more information etc..
>>
>> Thanks in advance for any feedback,
>
> Sorry, here they are:
>
> [root at polaris /]# fdisk -l
>
> Disk /dev/sda: 250.1 GB, 250059350016 bytes
> 255 heads, 63 sectors/track, 30401 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
> Disk identifier: 0x000acea3
>
>     Device Boot      Start         End      Blocks   Id  System
> /dev/sda1   *           1          26      204800   83  Linux
> Partition 1 does not end on cylinder boundary.
> /dev/sda2              26       30401   243991201   8e  Linux LVM
>
> Disk /dev/dm-0: 239.4 GB, 239427649536 bytes
> 255 heads, 63 sectors/track, 29108 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
> Disk identifier: 0x00000000
>
> Disk /dev/dm-0 doesn't contain a valid partition table
>
> Disk /dev/dm-1: 10.4 GB, 10418651136 bytes
> 255 heads, 63 sectors/track, 1266 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
> Disk identifier: 0x00000000
>
> Disk /dev/dm-1 doesn't contain a valid partition table
> [root at polaris /]#
>
> #########################################
> [root at polaris /]# mount
> /dev/mapper/vg_polaris-lv_root on / type ext4 (rw)
> proc on /proc type proc (rw)
> sysfs on /sys type sysfs (rw)
> devpts on /dev/pts type devpts (rw,gid=5,mode=620)
> tmpfs on /dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0")
> /dev/sda1 on /boot type ext4 (rw)
> none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
> sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
> gvfs-fuse-daemon on /home/neo/.gvfs type fuse.gvfs-fuse-daemon
> (rw,nosuid,nodev,user=neo)
> [root at polaris /]#
>