cant mount hard drive

# dmesg | tail
sd 5:0:0:0: [sdc] Mode Sense: 00 38 00 00
sd 5:0:0:0: [sdc] Assuming drive cache: write through
sd 5:0:0:0: [sdc] Assuming drive cache: write through
sdc: sdc1
sd 5:0:0:0: [sdc] Assuming drive cache: write through
sd 5:0:0:0: [sdc] Attached SCSI disk
EXT3-fs error (device sdc1): ext3_check_descriptors: Block bitmap for group 480 not in group (block 1562165802)!
EXT3-fs (sdc1): error: group descriptors corrupted
EXT3-fs error (device sdc1): ext3_check_descriptors: Block bitmap for group 480 not in group (block 1562165802)!
EXT3-fs (sdc1): error: group descriptors corrupted

is there is a way to fix this or just take my files to another drive? its 1tb i dont want to loose......

regards

su e2fsck -C0 /dev/sdc1
e2fsck 1.41.10 (10-Feb-2009)
e2fsck: Group descriptors look bad... trying backup blocks...
1.39-Nov102008 was not cleanly unmounted, check forced.
Pass 1: Checking inodes, blocks, and sizes
Inode 12159543 has INDEX_FL flag set on filesystem without htree support.
Clear HTree index<y>? yes

Inode 17121286 has INDEX_FL flag set on filesystem without htree support.
Clear HTree index<y>? yes

is there any way not to ask for all blocks?
does somebody knows if i will be able to get my files back?

Free inodes count wrong for group #6987 (16384, counted=16383).
Fix<y>? yes

Free inodes count wrong (122109941, counted=122106292).
Fix<y>? yes


1.39-Nov102008: ***** FILE SYSTEM WAS MODIFIED *****
1.39-Nov102008: 3660/122109952 files (52.7% non-contiguous), 237700377/244190008 blocks


seems to be fixed :)