My 80G Seagate Barracuda crashed. Cpu load 100 % and kubuntu told that:
Unmounted sdb and checked smart log /2/
Note
smartmontools/smartctl does not work on SATA drives on Linux Kernel 2.6.20-15.27
https://bugs.launchpad.net/ubuntu/+s...20/+bug/106821
A moment of googling: I did find this: Ddrescue - Data recovery tool /3/. It's also in the repositories...
HOW I RESCUED DATA FROM HARD DISK (two examples).
From /1/
Rescuing ext partition from sata disk.
Copying data from sdb to sda (you need empty partition, both partitions are unmounted).
It did take 4 hours (-r3, tries three times)
Checking rescued data.
Mounting rescued data (read only)
Now i have 58 G rescued data. 
Rescuing fat partition from pata disk
I have old 40G Maxtor DiamondMax (windows use). It died 2003. Plugged it in the computer (hdb).
Checking partitions
Checking:
Trying to rescue data from hdb6
It did take 3 hours.
Checking rescued data (using dosfsck)
Mounting rescued data
Rescued 4,4 G 
Very good program ! wow !!
If you are afraid of konsole :
kdiskrescue
http://www.kde-apps.org/content/show.php?content=49081
Note :
I have not tried it.
/1/ man ddrescue, info ddrescue
/2/ man smartctl
/3/ www.gnu.org/software/ddrescue/ddrescue.html
Buffer I/O error on device sdb1...
Note
smartmontools/smartctl does not work on SATA drives on Linux Kernel 2.6.20-15.27
https://bugs.launchpad.net/ubuntu/+s...20/+bug/106821
Code:
:~$ sudo smartctl -d ata -l selftest /dev/sdb
smartctl version 5.34 [i686-pc-linux-gnu] Copyright (C) 2002-5 Bruce Allen
Home page is http://smartmontools.sourceforge.net/
=== START OF READ SMART DATA SECTION ===
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Extended offline Completed: read failure 90% 2337 62964346
# 2 Short offline Completed: read failure 90% 2337 62964346
Home page is http://smartmontools.sourceforge.net/
=== START OF READ SMART DATA SECTION ===
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Extended offline Completed: read failure 90% 2337 62964346
# 2 Short offline Completed: read failure 90% 2337 62964346
A moment of googling: I did find this: Ddrescue - Data recovery tool /3/. It's also in the repositories...
HOW I RESCUED DATA FROM HARD DISK (two examples).
From /1/
Example 1: Rescue an ext2 partition in /dev/hda2 to /dev/hdb2
ddrescue -r3 /dev/hda2 /dev/hdb2 logfile
e2fsck -v -f /dev/hdb2
mount -t ext2 -o ro /dev/hdb2 /mnt
ddrescue -r3 /dev/hda2 /dev/hdb2 logfile
e2fsck -v -f /dev/hdb2
mount -t ext2 -o ro /dev/hdb2 /mnt
Rescuing ext partition from sata disk.
Copying data from sdb to sda (you need empty partition, both partitions are unmounted).
Code:
:~$ sudo ddrescue -r3 /dev/sdb1 /dev/sda2 logfile Password:
Press Ctrl-C to interrupt
Initial status (read from logfile)
rescued: 0 B, errsize: 0 B, errors: 0
Current status
rescued: 80023 MB, errsize: 147 kB, current rate: 0 B/s
ipos: 32237 MB, errors: 291, average rate: 6055 kB/s
opos: 32237 MB
Initial status (read from logfile)
rescued: 0 B, errsize: 0 B, errors: 0
Current status
rescued: 80023 MB, errsize: 147 kB, current rate: 0 B/s
ipos: 32237 MB, errors: 291, average rate: 6055 kB/s
opos: 32237 MB
Checking rescued data.
Code:
:~$ sudo e2fsck -v -f /dev/sda2 Password:
e2fsck 1.38 (30-Jun-2005)
Pass 1: Checking inodes, blocks, and sizes
Inode 4374541, i_blocks is 104, should be 208. Fix<y>? yes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Block bitmap differences: +(8757335--8757347)
Fix<y>? yes
Free blocks count wrong for group #267 (13, counted=0).
Fix<y>? yes
Free blocks count wrong (3708177, counted=3708164).
Fix<y>? yes
/dev/sda2: ***** FILE SYSTEM WAS MODIFIED *****
120565 inodes used (1%)
6180 non-contiguous inodes (5.1%)
# of inodes with ind/dind/tind blocks: 99879/1173/0
15828876 blocks used (81%)
0 bad blocks
0 large files
118969 regular files
1587 directories
0 character device files
0 block device files
0 fifos
0 links
0 symbolic links (0 fast symbolic links)
0 sockets
--------
120556 files
Pass 1: Checking inodes, blocks, and sizes
Inode 4374541, i_blocks is 104, should be 208. Fix<y>? yes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Block bitmap differences: +(8757335--8757347)
Fix<y>? yes
Free blocks count wrong for group #267 (13, counted=0).
Fix<y>? yes
Free blocks count wrong (3708177, counted=3708164).
Fix<y>? yes
/dev/sda2: ***** FILE SYSTEM WAS MODIFIED *****
120565 inodes used (1%)
6180 non-contiguous inodes (5.1%)
# of inodes with ind/dind/tind blocks: 99879/1173/0
15828876 blocks used (81%)
0 bad blocks
0 large files
118969 regular files
1587 directories
0 character device files
0 block device files
0 fifos
0 links
0 symbolic links (0 fast symbolic links)
0 sockets
--------
120556 files
Code:
sudo mount -t ext3 -o ro /dev/sda2 /media/sata/sat2
Rescuing fat partition from pata disk
I have old 40G Maxtor DiamondMax (windows use). It died 2003. Plugged it in the computer (hdb).
Checking partitions
Code:
:~$ sudo fdisk -l /dev/hdb
Disk /dev/hda: 40.0 GB, 40037760000 bytes
255 heads, 63 sectors/track, 4867 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/hdb1 * 1 447 3590496 b W95 FAT32
/dev/hdb2 448 4111 29431080 f W95 Ext'd (LBA)
/dev/hdb5 448 1722 10241406 b W95 FAT32
/dev/hdb6 1723 4111 19189611 b W95 FAT32
255 heads, 63 sectors/track, 4867 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/hdb1 * 1 447 3590496 b W95 FAT32
/dev/hdb2 448 4111 29431080 f W95 Ext'd (LBA)
/dev/hdb5 448 1722 10241406 b W95 FAT32
/dev/hdb6 1723 4111 19189611 b W95 FAT32
Code:
:~$ sudo smartctl -l selftest /dev/hdb
Home page is http://smartmontools.sourceforge.net/
=== START OF READ SMART DATA SECTION ===
SMART Self-test log structure revision number 0
Warning: ATA Specification requires self-test log structure revision number = 1
Num Test_Description Status Remaining LifeTime(hours) LBA _of_first_error
# 1 Short offline Completed: servo/seek failure 60% 164 733 69121
=== START OF READ SMART DATA SECTION ===
SMART Self-test log structure revision number 0
Warning: ATA Specification requires self-test log structure revision number = 1
Num Test_Description Status Remaining LifeTime(hours) LBA _of_first_error
# 1 Short offline Completed: servo/seek failure 60% 164 733 69121
Trying to rescue data from hdb6
Code:
:~$ sudo ddrescue -r3 /dev/hdb6 /dev/sdb1 logfile
Press Ctrl-C to interrupt
Initial status (read from logfile)
rescued: 0 B, errsize: 0 B, errors: 0
Current status
rescued: 19648 MB, errsize: 1978 kB, current rate: 0 B/s
ipos: 19632 MB, errors: 3885, average rate: 3046 kB/s
opos: 19632 MB
Initial status (read from logfile)
rescued: 0 B, errsize: 0 B, errors: 0
Current status
rescued: 19648 MB, errsize: 1978 kB, current rate: 0 B/s
ipos: 19632 MB, errors: 3885, average rate: 3046 kB/s
opos: 19632 MB
Checking rescued data (using dosfsck)
Code:
:~$ sudo dosfsck -v -f /dev/sdb1 Password:
dosfsck 2.11 (12 Mar 2005)
dosfsck 2.11, 12 Mar 2005, FAT32, LFN
Checking we can access the last sector of the filesystem
Boot sector contents:
System ID "MSWIN4.1"
Media byte 0xf8 (hard disk)
512 bytes per logical sector
16384 bytes per cluster
32 reserved sectors
First FAT starts at byte 16384 (sector 32)
2 FATs, 32 bit entries
4796416 bytes per FAT (= 9368 sectors)
Root directory start at cluster 2 (arbitrary size)
Data area starts at byte 9609216 (sector 18768)
1198764 data clusters (19640549376 bytes)
63 sectors/track, 255 heads
27663993 hidden sectors
38379222 sectors total
Reclaiming unconnected clusters.
Checking free cluster summary.
/dev/sdb1: 26773 files, 288001/1198764 clusters
dosfsck 2.11, 12 Mar 2005, FAT32, LFN
Checking we can access the last sector of the filesystem
Boot sector contents:
System ID "MSWIN4.1"
Media byte 0xf8 (hard disk)
512 bytes per logical sector
16384 bytes per cluster
32 reserved sectors
First FAT starts at byte 16384 (sector 32)
2 FATs, 32 bit entries
4796416 bytes per FAT (= 9368 sectors)
Root directory start at cluster 2 (arbitrary size)
Data area starts at byte 9609216 (sector 18768)
1198764 data clusters (19640549376 bytes)
63 sectors/track, 255 heads
27663993 hidden sectors
38379222 sectors total
Reclaiming unconnected clusters.
Checking free cluster summary.
/dev/sdb1: 26773 files, 288001/1198764 clusters
Mounting rescued data
Code:
sudo mount -t vfat -o ro /dev/sdb1 /media/sata/sat1
Very good program ! wow !!
If you are afraid of konsole
:kdiskrescue
http://www.kde-apps.org/content/show.php?content=49081
Description:
KDiskRescue is a KDE frontent to the gnu program ddrescue.
It's written with korundum, the qt/kde ruby bindings. So it depends to korundum and ddrescue.
It's still an alpha, so expect issues and report them if you can. Illustrations are alpha too
KDiskRescue is a KDE frontent to the gnu program ddrescue.
It's written with korundum, the qt/kde ruby bindings. So it depends to korundum and ddrescue.
It's still an alpha, so expect issues and report them if you can. Illustrations are alpha too
I have not tried it.
/1/ man ddrescue, info ddrescue
/2/ man smartctl
/3/ www.gnu.org/software/ddrescue/ddrescue.html