4TB Seagate overwritten partition table recovery

[jaydo]

Hi,

I messed up by running ""sudo dd if=pop.OS .....iso of=/dev/sdb status="progress". Obviously sdb wasn't the drive I was aiming for. (Also running for best rookie mistake award )

I saw my error when the usb-flash drive didn't start blinking, but my 4TB seagate expansion drive did.

I panicked and removed the usb drive without "unmounting" them properly.

However the 4tb seagate expansion now shows as "pop.os 22.04" with the size of 3GB. Logical as the dd command started. Obviously that ISO image is corrupt.
Also the headers now are malaligned.

My LinuxMintMate recognises the 4TB size of the drive, and shows it as 3.6TB, and finds the "popOS.iso" image as 3GB as a part.

My problem is that previously on the drive, in 3 main diretories were a lot of video files. Mostly music, tutorials, tv-series and you know what.

I would like to go back and restore the old partition table, I haven't "repaired" the disk (yet?).

When running testdisk, it freezes. Probably due to the header-alignment being messed up.

Photorec does scan the entire disk, and I have searched for "ext4" and "superblock". After a day or 2, having to resume the scan 4 times (my old laptop freezes often when streaming), the scan completed and found 8 .ext files, totalling just over 100GB. 3 files seem identical (16.6GB), one has the size of 41.3GB, and 4 others with vaiable sizes (0.5 to 9GB).

I'm afraid to make any changes with testdisk in fear of overwriting the old (and hopefully still recoverable) partition table. Any data loss will be taken for granted if a majority of files can be retrieved.

Another potential problem is that in the 'dev" directory (back-up for my working system) several development environments were living side by side. It totals 130.000 + files (angular/react/and more node shit). Some sym-links are broken in the back-up data). As I still have the working directory, this folder can be totally ignored for recovery.

So my questions are basically this:
1: How to explore the recovered ".ext" files for useable files.
-- Do I need to merge them into an image? (How do I do that).
-- if noting is to be gained from that, I will run photorec again, this time to grab music and video files, in the hope of rescuing some content.

2: Tips on restoring original partition table.
-- As in merging mbr/gpt? Do I only risk to lose 3GB + some overwritten indices, that way ?

I'm availabale to upload all kinds of info necessary for recovery, but due to the size of the expansion drive and limited cpu of my old Acer, we'll have to await the current superblock scan to finish in approx.97 hours, after having done 20% in 2h20 (but the timer is decreasing by 5 seconds each 2 seconds, so the end time is flexible I'd guess, glad the timer is finally going down...).

SO I can't actually change anything on the disk yet, but if you need other output from inxi or such, that is possible.

System: Host: ---- Kernel: 5.4.0-125-generic x86_64 bits: 64 Desktop: MATE 1.26.0 Distro: Linux Mint 20.3 Una

Machine: Type: Laptop System: Acer product: Aspire A315-41 v: V1.01 serial: ------
Mobo: RR model: Metapod_RR v: V1.01 serial: --------------- UEFI: Insyde v: 1.01 date: 01/19/2018

CPU: Topology: Quad Core model: AMD Ryzen 7 2700U with Radeon Vega Mobile Gfx bits: 64 type: MT MCP L2 cache: 2048 KiB
Speed: 1271 MHz min/max: 1600/2200 MHz Core speeds (MHz): 1: 1348 2: 1270 3: 1272 4: 1271 5: 1697 6: 1691 7: 1695
8: 1696

Partition:
ID-1: / size: 309.37 GiB used: 139.81 GiB (45.2%) fs: ext4 dev: /dev/sda3
ID-2: /boot/efi size: 511.0 MiB used: 137.6 MiB (26.9%) fs: vfat dev: /dev/sda1
ID-3: /media/jaymate/sda2-450gb size: 412.65 GiB used: 102.64 GiB (24.9%) fs: ext4 dev: /dev/sda2
ID-4: /mnt/usb-Seagate_Expansion_SW_00000000NACD0NWS-0:0-part1 raw size: 2.81 GiB size: N/A (hidden?)
used: N/A (hidden?) fs: iso9660 dev: /dev/sdb1

Unmounted:
ID-1: /dev/sda4 size: 158.06 GiB fs: ext4 label: N/A uuid: df52fcf6-370d-4172-8326-480102d3ca8c
ID-2: /dev/sda5 size: 37.25 GiB fs: ext4 label: elementaryOS40 uuid: feaf4ffe-b818-43fd-aa9c-3b8001d850bd
ID-3: /dev/sdb2 size: 4.0 MiB fs: vfat label: N/A uuid: 6170-E724


Anyone have some ideas, tips, advise with not too much smugness pls

[cgrenier]

I have deleted the 2 previous messages as they were not helpful.

The data recovery should be done in 2 big steps:
- recovery of the previous partition layout using testdisk
- recovery of the files on the first partition that has been partially overwritten.

For the first step, you need to list as best as your remember the partition type, partition size, label of each partition of the disk that have been partially overwritten. Do not provide information about other disk as it's confusing.
Please also provide testdisk.log output after using TestDisk, GPT EFI, Quick Search and if some partition was missing, Deeper Search.

If testdisk "freezes", is it when it's scanning near the end of the disk ? Run "dmesg" command and check for error message (ie. CRC error)

[jaydo]

Thanks for helping.
&
Thanks for your reply. I've finally got the time to address the issue again.

when executing "testdisk dev/sdb" following the guidance, having selected "quick search" the program seems to freeze.

Display output:

=============================================================================
TestDisk 7.1, Data Recovery Utility, July 2019
Christophe GRENIER <grenier@cgsecurity.org>
https://www.cgsecurity.org

Disk /dev/sdb - 4000 GB / 3726 GiB - CHS 1356603 180 32
Analyse cylinder 98/1356602: 00%

check_FAT: Unusual media descriptor (0xf8!=0xf0)
Warning: number of heads/cylinder mismatches 64 (FAT) != 180 (HD)
EFI System 484 8675 8192 [EFI System Partition] [NO NAME]
=============================================================================


The disk-led continues to blink.....

dmesg output (from first usb2-1 lines):
=============================================================================
[ 636.109101] usb 2-1: reset SuperSpeed Gen 1 USB device number 2 using xhci_hcd
[ 636.129990] scsi host1: uas_eh_device_reset_handler success
[ 642.485873] sd 1:0:0:0: [sdb] tag#24 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 642.485888] sd 1:0:0:0: [sdb] tag#24 Sense Key : Medium Error [current]
[ 642.485892] sd 1:0:0:0: [sdb] tag#24 Add. Sense: Unrecovered read error
[ 642.485896] sd 1:0:0:0: [sdb] tag#24 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 85 00 00 00 01 00 00
[ 642.485901] blk_update_request: critical medium error, dev sdb, sector 567173 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 642.485910] Buffer I/O error on dev sdb, logical block 567173, async page read
.
.

[ 3302.710671] blk_update_request: critical medium error, dev sdb, sector 567210 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3302.710681] Buffer I/O error on dev sdb, logical block 567210, async page read
[ 3308.893859] sd 1:0:0:0: [sdb] tag#10 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3308.893903] sd 1:0:0:0: [sdb] tag#10 Sense Key : Medium Error [current]
[ 3308.893909] sd 1:0:0:0: [sdb] tag#10 Add. Sense: Unrecovered read error
[ 3308.893915] sd 1:0:0:0: [sdb] tag#10 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ab 00 00 00 01 00 00
[ 3308.893921] blk_update_request: critical medium error, dev sdb, sector 567211 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3308.893933] Buffer I/O error on dev sdb, logical block 567211, async page read
[ 3314.741325] sd 1:0:0:0: [sdb] tag#15 uas_eh_abort_handler 0 uas-tag 8 inflight: CMD IN
[ 3314.741334] sd 1:0:0:0: [sdb] tag#15 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 af 00 00 00 01 00 00
[ 3314.741418] sd 1:0:0:0: [sdb] tag#14 uas_eh_abort_handler 0 uas-tag 7 inflight: CMD IN
[ 3314.741421] sd 1:0:0:0: [sdb] tag#14 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ae 00 00 00 01 00 00
[ 3314.741476] sd 1:0:0:0: [sdb] tag#13 uas_eh_abort_handler 0 uas-tag 6 inflight: CMD IN
[ 3314.741484] sd 1:0:0:0: [sdb] tag#13 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ad 00 00 00 01 00 00
[ 3314.741544] sd 1:0:0:0: [sdb] tag#12 uas_eh_abort_handler 0 uas-tag 5 inflight: CMD IN
[ 3314.741548] sd 1:0:0:0: [sdb] tag#12 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ac 00 00 00 01 00 00
[ 3314.761435] scsi host1: uas_eh_device_reset_handler start
[ 3314.889553] usb 2-1: reset SuperSpeed Gen 1 USB device number 2 using xhci_hcd
[ 3314.910553] scsi host1: uas_eh_device_reset_handler success
[ 3321.143642] sd 1:0:0:0: [sdb] tag#8 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3321.143668] sd 1:0:0:0: [sdb] tag#8 Sense Key : Medium Error [current]
[ 3321.143674] sd 1:0:0:0: [sdb] tag#8 Add. Sense: Unrecovered read error
[ 3321.143679] sd 1:0:0:0: [sdb] tag#8 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ac 00 00 00 01 00 00
[ 3321.143685] blk_update_request: critical medium error, dev sdb, sector 567212 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3321.143694] Buffer I/O error on dev sdb, logical block 567212, async page read
[ 3327.247201] sd 1:0:0:0: [sdb] tag#9 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3327.247237] sd 1:0:0:0: [sdb] tag#9 Sense Key : Medium Error [current]
[ 3327.247242] sd 1:0:0:0: [sdb] tag#9 Add. Sense: Unrecovered read error
[ 3327.247248] sd 1:0:0:0: [sdb] tag#9 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ad 00 00 00 01 00 00
[ 3327.247257] blk_update_request: critical medium error, dev sdb, sector 567213 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3327.247266] Buffer I/O error on dev sdb, logical block 567213, async page read
[ 3333.550286] sd 1:0:0:0: [sdb] tag#10 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3333.550337] sd 1:0:0:0: [sdb] tag#10 Sense Key : Medium Error [current]
[ 3333.550343] sd 1:0:0:0: [sdb] tag#10 Add. Sense: Unrecovered read error
[ 3333.550349] sd 1:0:0:0: [sdb] tag#10 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ae 00 00 00 01 00 00
[ 3333.550355] blk_update_request: critical medium error, dev sdb, sector 567214 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3333.550364] Buffer I/O error on dev sdb, logical block 567214, async page read
[ 3339.824932] sd 1:0:0:0: [sdb] tag#11 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3339.824947] sd 1:0:0:0: [sdb] tag#11 Sense Key : Medium Error [current]
[ 3339.824951] sd 1:0:0:0: [sdb] tag#11 Add. Sense: Unrecovered read error
[ 3339.824955] sd 1:0:0:0: [sdb] tag#11 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 af 00 00 00 01 00 00
[ 3339.824959] blk_update_request: critical medium error, dev sdb, sector 567215 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3339.824966] Buffer I/O error on dev sdb, logical block 567215, async page read
[ 3345.976052] sd 1:0:0:0: [sdb] tag#8 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3345.976087] sd 1:0:0:0: [sdb] tag#8 Sense Key : Medium Error [current]
[ 3345.976092] sd 1:0:0:0: [sdb] tag#8 Add. Sense: Unrecovered read error
[ 3345.976098] sd 1:0:0:0: [sdb] tag#8 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 a8 00 00 00 01 00 00
[ 3345.976105] blk_update_request: critical medium error, dev sdb, sector 567208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3345.976114] Buffer I/O error on dev sdb, logical block 567208, async page read
[ 3351.990591] sd 1:0:0:0: [sdb] tag#9 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3351.990635] sd 1:0:0:0: [sdb] tag#9 Sense Key : Medium Error [current]
[ 3351.990641] sd 1:0:0:0: [sdb] tag#9 Add. Sense: Unrecovered read error
[ 3351.990646] sd 1:0:0:0: [sdb] tag#9 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 a9 00 00 00 01 00 00
[ 3351.990652] blk_update_request: critical medium error, dev sdb, sector 567209 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3351.990663] Buffer I/O error on dev sdb, logical block 567209, async page read
[ 3358.228241] sd 1:0:0:0: [sdb] tag#10 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3358.228287] sd 1:0:0:0: [sdb] tag#10 Sense Key : Medium Error [current]
[ 3358.228292] sd 1:0:0:0: [sdb] tag#10 Add. Sense: Unrecovered read error
[ 3358.228298] sd 1:0:0:0: [sdb] tag#10 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 aa 00 00 00 01 00 00
[ 3358.228304] blk_update_request: critical medium error, dev sdb, sector 567210 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3358.228314] Buffer I/O error on dev sdb, logical block 567210, async page read
[ 3364.221086] sd 1:0:0:0: [sdb] tag#11 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3364.221130] sd 1:0:0:0: [sdb] tag#11 Sense Key : Medium Error [current]
[ 3364.221136] sd 1:0:0:0: [sdb] tag#11 Add. Sense: Unrecovered read error
[ 3364.221142] sd 1:0:0:0: [sdb] tag#11 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ab 00 00 00 01 00 00
[ 3364.221148] blk_update_request: critical medium error, dev sdb, sector 567211 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3364.221157] Buffer I/O error on dev sdb, logical block 567211, async page read
[ 3370.037167] sd 1:0:0:0: [sdb] tag#15 uas_eh_abort_handler 0 uas-tag 8 inflight: CMD IN
[ 3370.037175] sd 1:0:0:0: [sdb] tag#15 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 af 00 00 00 01 00 00
[ 3370.037289] sd 1:0:0:0: [sdb] tag#14 uas_eh_abort_handler 0 uas-tag 7 inflight: CMD IN
[ 3370.037292] sd 1:0:0:0: [sdb] tag#14 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ae 00 00 00 01 00 00
[ 3370.037364] sd 1:0:0:0: [sdb] tag#13 uas_eh_abort_handler 0 uas-tag 6 inflight: CMD IN
[ 3370.037369] sd 1:0:0:0: [sdb] tag#13 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ad 00 00 00 01 00 00
[ 3370.037432] sd 1:0:0:0: [sdb] tag#12 uas_eh_abort_handler 0 uas-tag 5 inflight: CMD IN
[ 3370.037439] sd 1:0:0:0: [sdb] tag#12 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ac 00 00 00 01 00 00
[ 3370.068864] scsi host1: uas_eh_device_reset_handler start
[ 3370.197098] usb 2-1: reset SuperSpeed Gen 1 USB device number 2 using xhci_hcd
[ 3370.218567] scsi host1: uas_eh_device_reset_handler success
[ 3376.631670] sd 1:0:0:0: [sdb] tag#12 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3376.631710] sd 1:0:0:0: [sdb] tag#12 Sense Key : Medium Error [current]
[ 3376.631715] sd 1:0:0:0: [sdb] tag#12 Add. Sense: Unrecovered read error
[ 3376.631720] sd 1:0:0:0: [sdb] tag#12 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ac 00 00 00 01 00 00
[ 3376.631726] blk_update_request: critical medium error, dev sdb, sector 567212 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3376.631741] Buffer I/O error on dev sdb, logical block 567212, async page read
[ 3382.854381] sd 1:0:0:0: [sdb] tag#13 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3382.854434] sd 1:0:0:0: [sdb] tag#13 Sense Key : Medium Error [current]
[ 3382.854439] sd 1:0:0:0: [sdb] tag#13 Add. Sense: Unrecovered read error
[ 3382.854445] sd 1:0:0:0: [sdb] tag#13 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ad 00 00 00 01 00 00
[ 3382.854451] blk_update_request: critical medium error, dev sdb, sector 567213 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3382.854460] Buffer I/O error on dev sdb, logical block 567213, async page read
[ 3388.918357] sd 1:0:0:0: [sdb] tag#14 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3388.918401] sd 1:0:0:0: [sdb] tag#14 Sense Key : Medium Error [current]
[ 3388.918406] sd 1:0:0:0: [sdb] tag#14 Add. Sense: Unrecovered read error
[ 3388.918412] sd 1:0:0:0: [sdb] tag#14 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ae 00 00 00 01 00 00
[ 3388.918418] blk_update_request: critical medium error, dev sdb, sector 567214 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3388.918427] Buffer I/O error on dev sdb, logical block 567214, async page read
[ 3395.171682] sd 1:0:0:0: [sdb] tag#15 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3395.171735] sd 1:0:0:0: [sdb] tag#15 Sense Key : Medium Error [current]
[ 3395.171741] sd 1:0:0:0: [sdb] tag#15 Add. Sense: Unrecovered read error
[ 3395.171747] sd 1:0:0:0: [sdb] tag#15 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 af 00 00 00 01 00 00
[ 3395.171753] blk_update_request: critical medium error, dev sdb, sector 567215 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3395.171763] Buffer I/O error on dev sdb, logical block 567215, async page read
[ 3401.648047] sd 1:0:0:0: [sdb] tag#12 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3401.648094] sd 1:0:0:0: [sdb] tag#12 Sense Key : Medium Error [current]
[ 3401.648099] sd 1:0:0:0: [sdb] tag#12 Add. Sense: Unrecovered read error
[ 3401.648105] sd 1:0:0:0: [sdb] tag#12 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 a8 00 00 00 01 00 00
[ 3401.648111] blk_update_request: critical medium error, dev sdb, sector 567208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3401.648121] Buffer I/O error on dev sdb, logical block 567208, async page read
[ 3407.868812] sd 1:0:0:0: [sdb] tag#13 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3407.868864] sd 1:0:0:0: [sdb] tag#13 Sense Key : Medium Error [current]
[ 3407.868869] sd 1:0:0:0: [sdb] tag#13 Add. Sense: Unrecovered read error
[ 3407.868875] sd 1:0:0:0: [sdb] tag#13 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 a9 00 00 00 01 00 00
[ 3407.868882] blk_update_request: critical medium error, dev sdb, sector 567209 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3407.868894] Buffer I/O error on dev sdb, logical block 567209, async page read
[ 3414.236664] sd 1:0:0:0: [sdb] tag#14 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3414.236698] sd 1:0:0:0: [sdb] tag#14 Sense Key : Medium Error [current]
[ 3414.236703] sd 1:0:0:0: [sdb] tag#14 Add. Sense: Unrecovered read error
[ 3414.236709] sd 1:0:0:0: [sdb] tag#14 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 aa 00 00 00 01 00 00
[ 3414.236715] blk_update_request: critical medium error, dev sdb, sector 567210 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3414.236725] Buffer I/O error on dev sdb, logical block 567210, async page read
[ 3420.338040] sd 1:0:0:0: [sdb] tag#15 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3420.338093] sd 1:0:0:0: [sdb] tag#15 Sense Key : Medium Error [current]
[ 3420.338098] sd 1:0:0:0: [sdb] tag#15 Add. Sense: Unrecovered read error
[ 3420.338105] sd 1:0:0:0: [sdb] tag#15 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ab 00 00 00 01 00 00
[ 3420.338111] blk_update_request: critical medium error, dev sdb, sector 567211 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3420.338121] Buffer I/O error on dev sdb, logical block 567211, async page read
[ 3425.332959] sd 1:0:0:0: [sdb] tag#19 uas_eh_abort_handler 0 uas-tag 8 inflight: CMD IN
[ 3425.332967] sd 1:0:0:0: [sdb] tag#19 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 af 00 00 00 01 00 00
[ 3425.333086] sd 1:0:0:0: [sdb] tag#18 uas_eh_abort_handler 0 uas-tag 7 inflight: CMD IN
[ 3425.333090] sd 1:0:0:0: [sdb] tag#18 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ae 00 00 00 01 00 00
[ 3425.333139] sd 1:0:0:0: [sdb] tag#17 uas_eh_abort_handler 0 uas-tag 5 inflight: CMD IN
[ 3425.333145] sd 1:0:0:0: [sdb] tag#17 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ac 00 00 00 01 00 00
[ 3425.333227] sd 1:0:0:0: [sdb] tag#16 uas_eh_abort_handler 0 uas-tag 6 inflight: CMD IN
[ 3425.333231] sd 1:0:0:0: [sdb] tag#16 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ad 00 00 00 01 00 00
[ 3425.360663] scsi host1: uas_eh_device_reset_handler start
[ 3425.489210] usb 2-1: reset SuperSpeed Gen 1 USB device number 2 using xhci_hcd
[ 3425.510709] scsi host1: uas_eh_device_reset_handler success
[ 3433.020389] sd 1:0:0:0: [sdb] tag#16 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3433.020448] sd 1:0:0:0: [sdb] tag#16 Sense Key : Medium Error [current]
[ 3433.020453] sd 1:0:0:0: [sdb] tag#16 Add. Sense: Unrecovered read error
[ 3433.020459] sd 1:0:0:0: [sdb] tag#16 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ad 00 00 00 01 00 00
[ 3433.020465] blk_update_request: critical medium error, dev sdb, sector 567213 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3433.020475] Buffer I/O error on dev sdb, logical block 567213, async page read
[ 3439.145053] sd 1:0:0:0: [sdb] tag#17 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3439.145091] sd 1:0:0:0: [sdb] tag#17 Sense Key : Medium Error [current]
[ 3439.145096] sd 1:0:0:0: [sdb] tag#17 Add. Sense: Unrecovered read error
[ 3439.145102] sd 1:0:0:0: [sdb] tag#17 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ac 00 00 00 01 00 00
[ 3439.145108] blk_update_request: critical medium error, dev sdb, sector 567212 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3439.145118] Buffer I/O error on dev sdb, logical block 567212, async page read
[ 3445.371730] sd 1:0:0:0: [sdb] tag#18 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3445.371782] sd 1:0:0:0: [sdb] tag#18 Sense Key : Medium Error [current]
[ 3445.371787] sd 1:0:0:0: [sdb] tag#18 Add. Sense: Unrecovered read error
[ 3445.371793] sd 1:0:0:0: [sdb] tag#18 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ae 00 00 00 01 00 00
[ 3445.371799] blk_update_request: critical medium error, dev sdb, sector 567214 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3445.371808] Buffer I/O error on dev sdb, logical block 567214, async page read
[ 3451.429718] sd 1:0:0:0: [sdb] tag#19 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3451.429768] sd 1:0:0:0: [sdb] tag#19 Sense Key : Medium Error [current]
[ 3451.429774] sd 1:0:0:0: [sdb] tag#19 Add. Sense: Unrecovered read error
[ 3451.429779] sd 1:0:0:0: [sdb] tag#19 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 af 00 00 00 01 00 00
[ 3451.429785] blk_update_request: critical medium error, dev sdb, sector 567215 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3451.429795] Buffer I/O error on dev sdb, logical block 567215, async page read
[ 3457.525986] sd 1:0:0:0: [sdb] tag#16 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3457.526022] sd 1:0:0:0: [sdb] tag#16 Sense Key : Medium Error [current]
[ 3457.526028] sd 1:0:0:0: [sdb] tag#16 Add. Sense: Unrecovered read error
[ 3457.526034] sd 1:0:0:0: [sdb] tag#16 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 a8 00 00 00 01 00 00
[ 3457.526039] blk_update_request: critical medium error, dev sdb, sector 567208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3457.526049] Buffer I/O error on dev sdb, logical block 567208, async page read
[ 3463.605939] sd 1:0:0:0: [sdb] tag#17 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3463.605998] sd 1:0:0:0: [sdb] tag#17 Sense Key : Medium Error [current]
[ 3463.606004] sd 1:0:0:0: [sdb] tag#17 Add. Sense: Unrecovered read error
[ 3463.606012] sd 1:0:0:0: [sdb] tag#17 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 a9 00 00 00 01 00 00
[ 3463.606020] blk_update_request: critical medium error, dev sdb, sector 567209 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3463.606035] Buffer I/O error on dev sdb, logical block 567209, async page read
[ 3470.104013] sd 1:0:0:0: [sdb] tag#18 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3470.104051] sd 1:0:0:0: [sdb] tag#18 Sense Key : Medium Error [current]
[ 3470.104057] sd 1:0:0:0: [sdb] tag#18 Add. Sense: Unrecovered read error
[ 3470.104064] sd 1:0:0:0: [sdb] tag#18 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 aa 00 00 00 01 00 00
[ 3470.104072] blk_update_request: critical medium error, dev sdb, sector 567210 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3470.104087] Buffer I/O error on dev sdb, logical block 567210, async page read
[ 3476.183691] sd 1:0:0:0: [sdb] tag#19 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3476.183747] sd 1:0:0:0: [sdb] tag#19 Sense Key : Medium Error [current]
[ 3476.183753] sd 1:0:0:0: [sdb] tag#19 Add. Sense: Unrecovered read error
[ 3476.183761] sd 1:0:0:0: [sdb] tag#19 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ab 00 00 00 01 00 00
[ 3476.183773] blk_update_request: critical medium error, dev sdb, sector 567211 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3476.183786] Buffer I/O error on dev sdb, logical block 567211, async page read
[ 3482.366752] sd 1:0:0:0: [sdb] tag#20 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3482.366793] sd 1:0:0:0: [sdb] tag#20 Sense Key : Medium Error [current]
[ 3482.366803] sd 1:0:0:0: [sdb] tag#20 Add. Sense: Unrecovered read error
[ 3482.366810] sd 1:0:0:0: [sdb] tag#20 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ac 00 00 00 01 00 00
[ 3482.366816] blk_update_request: critical medium error, dev sdb, sector 567212 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3482.366826] Buffer I/O error on dev sdb, logical block 567212, async page read
[ 3482.676759] sd 1:0:0:0: [sdb] tag#23 uas_eh_abort_handler 0 uas-tag 8 inflight: CMD IN
[ 3482.676767] sd 1:0:0:0: [sdb] tag#23 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 af 00 00 00 01 00 00
[ 3482.676881] sd 1:0:0:0: [sdb] tag#22 uas_eh_abort_handler 0 uas-tag 7 inflight: CMD IN
[ 3482.676884] sd 1:0:0:0: [sdb] tag#22 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ae 00 00 00 01 00 00
[ 3482.676929] sd 1:0:0:0: [sdb] tag#21 uas_eh_abort_handler 0 uas-tag 6 inflight: CMD IN
[ 3482.676931] sd 1:0:0:0: [sdb] tag#21 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ad 00 00 00 01 00 00
[ 3482.692641] scsi host1: uas_eh_device_reset_handler start
[ 3482.820992] usb 2-1: reset SuperSpeed Gen 1 USB device number 2 using xhci_hcd
[ 3482.842782] scsi host1: uas_eh_device_reset_handler success
[ 3489.224589] sd 1:0:0:0: [sdb] tag#20 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3489.224623] sd 1:0:0:0: [sdb] tag#20 Sense Key : Medium Error [current]
[ 3489.224629] sd 1:0:0:0: [sdb] tag#20 Add. Sense: Unrecovered read error
[ 3489.224634] sd 1:0:0:0: [sdb] tag#20 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ad 00 00 00 01 00 00
[ 3489.224640] blk_update_request: critical medium error, dev sdb, sector 567213 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3489.224650] Buffer I/O error on dev sdb, logical block 567213, async page read
[ 3495.196831] sd 1:0:0:0: [sdb] tag#21 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3495.196883] sd 1:0:0:0: [sdb] tag#21 Sense Key : Medium Error [current]
[ 3495.196889] sd 1:0:0:0: [sdb] tag#21 Add. Sense: Unrecovered read error
[ 3495.196896] sd 1:0:0:0: [sdb] tag#21 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 ae 00 00 00 01 00 00
[ 3495.196902] blk_update_request: critical medium error, dev sdb, sector 567214 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3495.196911] Buffer I/O error on dev sdb, logical block 567214, async page read
[ 3501.608091] sd 1:0:0:0: [sdb] tag#22 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3501.608142] sd 1:0:0:0: [sdb] tag#22 Sense Key : Medium Error [current]
[ 3501.608147] sd 1:0:0:0: [sdb] tag#22 Add. Sense: Unrecovered read error
[ 3501.608154] sd 1:0:0:0: [sdb] tag#22 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 af 00 00 00 01 00 00
[ 3501.608160] blk_update_request: critical medium error, dev sdb, sector 567215 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3501.608169] Buffer I/O error on dev sdb, logical block 567215, async page read
[ 3507.566506] sd 1:0:0:0: [sdb] tag#20 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3507.566560] sd 1:0:0:0: [sdb] tag#20 Sense Key : Medium Error [current]
[ 3507.566566] sd 1:0:0:0: [sdb] tag#20 Add. Sense: Unrecovered read error
[ 3507.566572] sd 1:0:0:0: [sdb] tag#20 CDB: Read(16) 88 00 00 00 00 00 00 08 a7 a9 00 00 00 01 00 00
[ 3507.566578] blk_update_request: critical medium error, dev sdb, sector 567209 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 3507.566588] Buffer I/O error on dev sdb, logical block 567209, async page read



=============================================================================

So the testdisk command is still churning out d-messages, but the console output is not updated.
Now i'm not sure if the program has 'frozen' or not. It freezes shortly after starting. No testdisk.log found.

Do I choose "stop" or do I wait untill there are no more dmesg errors?