disk unreadable by os x after use with windows xp

[thd93]

i plugged my 2tb western digital my passport (fat32, one partition) into a friend's windows xp computer tonight. the computer could not read the drive, and my mac can't either now. here's the log from testdisk & a screenshot.

Hard disk list
Disk /dev/disk0 - 121 GB / 113 GiB - 236978176 sectors (RO), sector size=512
Disk /dev/disk2 - 2000 GB / 1862 GiB - 3906963456 sectors, sector size=512
Disk /dev/rdisk0 - 121 GB / 113 GiB - 236978176 sectors (RO), sector size=512
Disk /dev/rdisk1 - 120 GB / 111 GiB - 234586112 sectors, sector size=512
Disk /dev/rdisk2 - 2000 GB / 1862 GiB - 3906963456 sectors, sector size=512

Partition table type default to EFI GPT
Disk /dev/rdisk2 - 2000 GB / 1862 GiB
Partition table type: Intel

Analyse Disk /dev/rdisk2 - 2000 GB / 1862 GiB - 3906963456 sectors
Current partition structure:

Partition: Read error

search_part()
Disk /dev/rdisk2 - 2000 GB / 1862 GiB - 3906963456 sectors
file_pread(8,1,buffer,2(2/0/1)) read err: Input/output error
file_pread(8,14,buffer,3(3/0/1)) read err: Input/output error
BAD_RS LBA=1704142259 48
check_part_i386 failed for partition type 04
FAT16 <32M 1704142259 5270235814 3566093556
This partition ends after the disk limits. (start=1704142259, size=3566093556, end=5270235814, disk end=3906963456)
BAD_RS LBA=1156248864 529
check_part_i386 failed for partition type 01
FAT12 1156248864 4117496161 2961247298
This partition ends after the disk limits. (start=1156248864, size=2961247298, end=4117496161, disk end=3906963456)
BAD_RS LBA=288611812 509
check_part_i386 failed for partition type 04
FAT16 <32M 288611812 322170883 33559072
BAD_RS LBA=232772076 941
check_FAT: can't read FAT boot sector
check_part_i386 failed for partition type 0C
FAT32 LBA 4527739372 5763562066 1235822695
This partition ends after the disk limits. (start=4527739372, size=1235822695, end=5763562066, disk end=3906963456)
BAD_RS LBA=1388164889 735
check_part_i386 failed for partition type 04
FAT16 <32M 1388164889 1963113401 574948513
BAD_RS LBA=4264926395 791
check_FAT: can't read FAT boot sector
check_part_i386 failed for partition type 06
FAT16 >32M 4264926395 6591988671 2327062277
This partition ends after the disk limits. (start=4264926395, size=2327062277, end=6591988671, disk end=3906963456)

LVM magic value at 1965212966/0/1
BAD_RS LBA=1785191550 1023
check_FAT: can't read FAT boot sector
check_part_i386 failed for partition type 01
FAT12 6080158846 9803438978 3723280133
This partition ends after the disk limits. (start=6080158846, size=3723280133, end=9803438978, disk end=3906963456)
BAD_RS LBA=2783760853 741
check_part_i386 failed for partition type 07
HPFS - NTFS 2783760853 4959583375 2175822523
This partition ends after the disk limits. (start=2783760853, size=2175822523, end=4959583375, disk end=3906963456)
BAD_RS LBA=361503739 450
check_FAT: can't read FAT boot sector
check_part_i386 failed for partition type 06
FAT16 >32M 4656471035 8691422172 4034951138
This partition ends after the disk limits. (start=4656471035, size=4034951138, end=8691422172, disk end=3906963456)
BAD_RS LBA=2207820807 1059
check_part_i386 failed for partition type 0B
FAT32 2207820807 5084514826 2876694020
This partition ends after the disk limits. (start=2207820807, size=2876694020, end=5084514826, disk end=3906963456)
BAD_RS LBA=3080549473 261
check_part_i386 failed for partition type 01
FAT12 3080549473 3939143393 858593921
This partition ends after the disk limits. (start=3080549473, size=858593921, end=3939143393, disk end=3906963456)
BAD_RS LBA=1455599429 523
check_FAT: can't read FAT boot sector
check_part_i386 failed for partition type 0E
FAT16 LBA 5750566725 9599441123 3848874399
This partition ends after the disk limits. (start=5750566725, size=3848874399, end=9599441123, disk end=3906963456)
BAD_RS LBA=1817977161 952
check_FAT: can't read FAT boot sector
check_part_i386 failed for partition type 04
FAT16 <32M 6112944457 8607319536 2494375080
This partition ends after the disk limits. (start=6112944457, size=2494375080, end=8607319536, disk end=3906963456)
BAD_RS LBA=4002672842 724
check_part_i386 failed for partition type 07
HPFS - NTFS 4002672842 4258220994 255548153
This partition ends after the disk limits. (start=4002672842, size=255548153, end=4258220994, disk end=3906963456)
BAD_RS LBA=2786390733 92
check_part_i386 failed for partition type 01
FAT12 2786390733 4171589004 1385198272
This partition ends after the disk limits. (start=2786390733, size=1385198272, end=4171589004, disk end=3906963456)
BAD_RS LBA=2819854001 573
check_part_i386 failed for partition type 06
FAT16 >32M 2819854001 3412790946 592936946
BAD_RS LBA=243289043 0
check_FAT: can't read FAT boot sector
check_part_i386 failed for partition type 0E
FAT16 LBA 4538256339 7587794328 3049537990
This partition ends after the disk limits. (start=4538256339, size=3049537990, end=7587794328, disk end=3906963456)
BAD_RS LBA=499863817 485
check_FAT: can't read FAT boot sector
check_part_i386 failed for partition type 01
FAT12 4794831113 8778998197 3984167085
This partition ends after the disk limits. (start=4794831113, size=3984167085, end=8778998197, disk end=3906963456)
BAD_RS LBA=839495292 921
check_FAT: can't read FAT boot sector
check_part_i386 failed for partition type 0B
FAT32 5134462588 5785639467 651176880
This partition ends after the disk limits. (start=5134462588, size=651176880, end=5785639467, disk end=3906963456)
BAD_RS LBA=1075659904 1238
check_FAT: can't read FAT boot sector
check_part_i386 failed for partition type 04
FAT16 <32M 5370627200 6629199492 1258572293
This partition ends after the disk limits. (start=5370627200, size=1258572293, end=6629199492, disk end=3906963456)
BAD_RS LBA=998852486 886
check_FAT: can't read FAT boot sector
check_part_i386 failed for partition type 0B
FAT32 5293819782 9547194467 4253374686
This partition ends after the disk limits. (start=5293819782, size=4253374686, end=9547194467, disk end=3906963456)
BAD_RS LBA=386330455 554
check_FAT: can't read FAT boot sector
check_part_i386 failed for partition type 0B
FAT32 4681297751 7965048623 3283750873
This partition ends after the disk limits. (start=4681297751, size=3283750873, end=7965048623, disk end=3906963456)
BAD_RS LBA=1741926366 739
check_FAT: can't read FAT boot sector
check_part_i386 failed for partition type 06
FAT16 >32M 6036893662 7656375797 1619482136
This partition ends after the disk limits. (start=6036893662, size=1619482136, end=7656375797, disk end=3906963456)
BAD_RS LBA=1116027695 743
check_FAT: can't read FAT boot sector
check_part_i386 failed for partition type 0C
FAT32 LBA 5410994991 7047105467 1636110477
This partition ends after the disk limits. (start=5410994991, size=1636110477, end=7047105467, disk end=3906963456)
BAD_RS LBA=1848293323 1191
check_FAT: can't read FAT boot sector
check_part_i386 failed for partition type 04
FAT16 <32M 6143260619 9195741380 3052480762
This partition ends after the disk limits. (start=6143260619, size=3052480762, end=9195741380, disk end=3906963456)
BAD_RS LBA=3477861825 742
check_part_i386 failed for partition type 0E
FAT16 LBA 3477861825 7650316831 4172455007
This partition ends after the disk limits. (start=3477861825, size=4172455007, end=7650316831, disk end=3906963456)
BAD_RS LBA=236386906 833
check_FAT: can't read FAT boot sector
check_part_i386 failed for partition type 01
FAT12 4531354202 7250012915 2718658714
This partition ends after the disk limits. (start=4531354202, size=2718658714, end=7250012915, disk end=3906963456)
BAD_RS LBA=3643932462 1140
check_part_i386 failed for partition type 04
FAT16 <32M 3643932462 3680054396 36121935
Disk /dev/rdisk2 - 2000 GB / 1862 GiB - 3906963456 sectors
Check the harddisk size: HD jumpers settings, BIOS detection...
The harddisk (2000 GB / 1862 GiB) seems too small! (< 5019 GB / 4674 GiB)
The following partitions can't be recovered:
FAT12 1156248864 4117496161 2961247298
FAT16 <32M 1704142259 5270235814 3566093556
FAT32 2207820807 5084514826 2876694020
HPFS - NTFS 2783760853 4959583375 2175822523
FAT12 2786390733 4171589004 1385198272
FAT12 3080549473 3939143393 858593921
FAT16 LBA 3477861825 7650316831 4172455007
HPFS - NTFS 4002672842 4258220994 255548153
FAT16 >32M 4264926395 6591988671 2327062277
FAT32 LBA 4527739372 5763562066 1235822695
FAT12 4531354202 7250012915 2718658714
FAT1

[cgrenier]

There are I/O errors. You disk probably contains bad sectors. It's a physical problem so it shouldn't be caused by using the disk on an XP, probably a mechanical or electric shock.
You can try to clone the disk to a new empty disk using gnu ddrescue, if rdisk3 is the destination:

Code: Select all

sudo ddrescue /dev/rdisk2 /dev/rdisk3 rdisk2.log

[thd93]

thanks. i kind of figured the i/o errors were bad news but i thought i'd post a log just in case. i guess the boot sector-related errors got my hopes up

[thd93]

ok i ran ddrescue. i did not try and wipe the new drive beforehand and just overwrote, i hope that is not a problem. here is the log from running testdisk on the new drive.

Hard disk list
Disk /dev/disk0 - 121 GB / 113 GiB - 236978176 sectors (RO), sector size=512
Disk /dev/disk2 - 2000 GB / 1862 GiB - 3906963456 sectors, sector size=512
Disk /dev/rdisk0 - 121 GB / 113 GiB - 236978176 sectors (RO), sector size=512
Disk /dev/rdisk1 - 120 GB / 111 GiB - 234586112 sectors, sector size=512
Disk /dev/rdisk2 - 2000 GB / 1862 GiB - 3906963456 sectors, sector size=512

Partition table type (auto): Intel
Disk /dev/rdisk2 - 2000 GB / 1862 GiB
Partition table type: Intel

Analyse Disk /dev/rdisk2 - 2000 GB / 1862 GiB - 3906963456 sectors
Geometry from i386 MBR: head=255 sector=63
BAD_RS LBA=1 1339
check_part_i386 1 type EE: no test
get_geometry_from_list_part_aux head=1 nbr=2
get_geometry_from_list_part_aux head=8 nbr=1
get_geometry_from_list_part_aux head=16 nbr=1
get_geometry_from_list_part_aux head=32 nbr=1
get_geometry_from_list_part_aux head=64 nbr=1
get_geometry_from_list_part_aux head=128 nbr=1
get_geometry_from_list_part_aux head=240 nbr=1
get_geometry_from_list_part_aux head=255 nbr=1
Current partition structure:
1 P EFI GPT 1 3906963448 3906963448

Warning: Bad starting sector (CHS and LBA don't match)
No partition is bootable

search_part()
Disk /dev/rdisk2 - 2000 GB / 1862 GiB - 3906963456 sectors
FAT32 at 8/0/1
FAT1 : 32-476839
FAT2 : 476840-953647
start_rootdir : 953648 root cluster : 2
Data : 953648-3906963439
sectors : 3906963454
cluster_size : 64
no_of_cluster : 61031403 (2 - 61031404)
fat_length 476808 calculated 476808
FAT differs, FAT sectors=0-16/476808
heads/cylinder 255 (FAT) != 1 (HD)
sect/track 32 (FAT) != 1 (HD)
set_FAT_info: name from BS used

FAT32 at 8/0/1
FAT32 LBA 8 3906963461 3906963454 [UNTITLED]
FAT32, blocksize=32768, 2000 GB / 1862 GiB
This partition ends after the disk limits. (start=8, size=3906963454, end=3906963461, disk end=3906963456)

HFS+ magic value at 409640/0/1
part_size 3906291632
HFS 409640 3906701271 3906291632
HFS+ blocksize=4096, 2000 GB / 1862 GiB
Disk /dev/rdisk2 - 2000 GB / 1862 GiB - 3906963456 sectors
Check the harddisk size: HD jumpers settings, BIOS detection...
The harddisk (2000 GB / 1862 GiB) seems too small! (< 2000 GB / 1862 GiB)
The following partition can't be recovered:
FAT32 LBA 8 3906963461 3906963454 [UNTITLED]
FAT32, blocksize=32768, 2000 GB / 1862 GiB
get_geometry_from_list_part_aux head=1 nbr=2
get_geometry_from_list_part_aux head=8 nbr=2
Warning: the current number of heads per cylinder is 1 but the correct value may be 8.

Results
* HFS 409640 3906701271 3906291632
HFS+ blocksize=4096, 2000 GB / 1862 GiB

* HFS 409640 3906701271 3906291632
HFS+ blocksize=4096, 2000 GB / 1862 GiB
Support for this filesystem hasn't been enable during compilation.

interface_write()
1 * HFS 409640 3906701271 3906291632

[thd93]

ddrescue could not save 4096 bytes of the drive. i did retry passes with no luck.

[thd93]

that's the size of an advanced format sector, isn't it? i don't know, maybe that will help.

[thd93]

if in any case testdisk can't do anything and you know of other routes to try, please let me know. at this point i'm concerned about the data but have accepted that i may have lost it- on the other hand i'm enjoying learning about this process, so if there's something else i can i do to continue i'd like to know.

[europanorama]

Use knoppix live dvd to save data.
http://forum.cgsecurity.org/phpBB3/back ... t4690.html
and dont do things before getting advice.

[thd93]

did i do anything i should not have or is that advice for the future?

[thd93]

ok, seeing as you recommend knoppix to everyone regardless of their problem im going to assume you didnt even read my logfile..