Did not shut down correctly

The text in the picture indicates a problem with a hard disk (I assume sdc).

Which disks do you have in your system? Is /dev/sdc one of the external disks?

I believe that it's /dev/sda SSD see link:-
https://photos.app.goo.gl/RDmssU9yw1QJYhGd6
No external disk connected now.

Looks like a bad drive. You can run an fsck on the disk from a live Ubuntu USB.

Personally I'd replace the drive, reinstall Ubuntu and restore user data from your backups

Thank you Andrew.
I think I will go the your second option, but interested in the first.
Would this be a Ubuntu ISO file of the same Ubuntu OS?

I have forgotten how to done this, can help please?

Yes. You need the file system to be unmounted to check it. This is the same in Windows too.

1. The ISO file need not be exactly the same version as the installed operating system, but it should not be much older.

2. I doubt that the drive with problems is /des/sda, because the last line in your picture tells sdc.

3. Instructions:
Start with https://ubuntu.com/tutorials/install-ubuntu-desktop steps 1 to 4, and create a bootable USB stick (or burn a DVD).
Boot that device and select "Try Ubuntu"
Then open a terminal window and execute fsck on the partitions in question.

Sorry I will have to come back to this later.

Thanks

Rich.b

Well Manfred you were correct it's the sdc drive that is the problem.
I disconnected both 2TB HD's and the problem had gone.
Then reconnected them one-at-time.

Andrew suggested "You can run an fsck on the disk from a live Ubuntu USB."

Question how do I do that if connecting sdc drive means I can't see any of the 2TB drives?

Thanks again.

Rich.b

You cannot use the graphical file explorer for running a file systemcheck but you better use a terminal window.

The photo in comment #2 shows that there is lvm involved, which makes the case more complicated.

What is the layout of the disks, physical volumes and logical volumes?
What is on /dev/sdc?
Did you activate redundancy (RAID) functions?
Do you have a recent backup?

But maybe I misinterpreted your photo and lvm does not involve the two 2TB disks?

As far as I know only the SSD sda is lvm.

Here is link of sdc formatted in July 2020 I do not think that it has been change since.
https://photos.app.goo.gl/EfBBjgUHX5K9YL5FA
Other than I did remove Linux_Backup & Back up Linux on the 2nd of Aug 2022 them empted the Rubbish Bin, that's when the problem started I think.

"What on /dev/sdc" Now, nothing of consequence, as far as I know.

"Did you activate redundancy (RAID) functions?" Don't know I do not think so.

"Do you have a recent backup?" I still have two backups on the other 2TB and the other in cloud.

I did do a CLEAN install in Jan 2021 Ubuntu 20.04LTS
Only on the SSD, As far as know.

I suggest that you:

plug in the disk which we assume is sdc, wait half a minute and then enter the command

dmesg | tail

in a terminal window.
What is the output of that command?

Do I enter dmesg | tail with sudo?
The sdc drive has power connected but not Data Lead, is it save to plug this in while the PC on power up?

As far as I can remember, dmesg does not need sudo on Ubuntu 20.04 (it does on 22.04). In any case, sudo cannot do harm with dmesg.

If sdc is connected via an USB cable, then this should be hot-plug (but before un-plugging you should logically "eject" the partitions of the drive).

sdc data cable is SATA

Now I am lost. You wrote about external disks, but now it seems to be internal?

Sorry to have confused you, I have 2x2TB internal HD's and one external HD which is also 2TB.

The problem drive is the INTERNAL sdc which is SATA data cable.

Can you boot the system when sdc is conected with power and data cables?

Yes, but can't see the 2 internal drives if the sdc is connected only “efi” and the other “Filesystem root”.

Ok, boot the system with the internal drives connected and then run the command

dmesg | grep sdc

What do you get?

richard@charged-particle:~$ dmesg | grep sdc
[ 1.194878] sd 5:0:0:0: [sdc] 3907029168 512-byte logical blocks: (2.00 TB/1.82 TiB)
[ 1.194879] sd 5:0:0:0: [sdc] 4096-byte physical blocks
[ 1.194884] sd 5:0:0:0: [sdc] Write Protect is off
[ 1.194886] sd 5:0:0:0: [sdc] Mode Sense: 00 3a 00 00
[ 1.194894] sd 5:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 1.260530] sdc: sdc1 sdc2 < sdc5 sdc6 >
[ 1.275335] sd 5:0:0:0: [sdc] Attached SCSI disk
[ 5.600499] sd 5:0:0:0: [sdc] tag#7 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 5.600500] sd 5:0:0:0: [sdc] tag#7 Sense Key : Medium Error [current]
[ 5.600502] sd 5:0:0:0: [sdc] tag#7 Add. Sense: Unrecovered read error - auto reallocate failed
[ 5.600504] sd 5:0:0:0: [sdc] tag#7 CDB: Read(10) 28 00 00 00 08 88 00 00 78 00
[ 5.600505] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x80700 phys_seg 7 prio class 0
[ 9.216081] sd 5:0:0:0: [sdc] tag#24 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 9.216082] sd 5:0:0:0: [sdc] tag#24 Sense Key : Medium Error [current]
[ 9.216084] sd 5:0:0:0: [sdc] tag#24 Add. Sense: Unrecovered read error - auto reallocate failed
[ 9.216085] sd 5:0:0:0: [sdc] tag#24 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 9.216087] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 9.216089] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 12.792081] sd 5:0:0:0: [sdc] tag#31 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 12.792082] sd 5:0:0:0: [sdc] tag#31 Sense Key : Medium Error [current]
[ 12.792084] sd 5:0:0:0: [sdc] tag#31 Add. Sense: Unrecovered read error - auto reallocate failed
[ 12.792085] sd 5:0:0:0: [sdc] tag#31 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 12.792087] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 12.792089] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 16.504120] sd 5:0:0:0: [sdc] tag#1 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 16.504122] sd 5:0:0:0: [sdc] tag#1 Sense Key : Medium Error [current]
[ 16.504124] sd 5:0:0:0: [sdc] tag#1 Add. Sense: Unrecovered read error - auto reallocate failed
[ 16.504125] sd 5:0:0:0: [sdc] tag#1 CDB: Read(10) 28 00 00 00 08 00 00 01 00 00
[ 16.504127] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 23.383869] sd 5:0:0:0: [sdc] tag#28 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 23.383871] sd 5:0:0:0: [sdc] tag#28 Sense Key : Medium Error [current]
[ 23.383873] sd 5:0:0:0: [sdc] tag#28 Add. Sense: Unrecovered read error - auto reallocate failed
[ 23.383875] sd 5:0:0:0: [sdc] tag#28 CDB: Read(10) 28 00 00 00 08 88 00 00 78 00
[ 23.383877] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x80700 phys_seg 10 prio class 0
[ 27.003670] sd 5:0:0:0: [sdc] tag#9 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 27.003676] sd 5:0:0:0: [sdc] tag#9 Sense Key : Medium Error [current]
[ 27.003680] sd 5:0:0:0: [sdc] tag#9 Add. Sense: Unrecovered read error - auto reallocate failed
[ 27.003686] sd 5:0:0:0: [sdc] tag#9 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 27.003692] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 27.003699] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 30.564462] sd 5:0:0:0: [sdc] tag#20 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 30.564468] sd 5:0:0:0: [sdc] tag#20 Sense Key : Medium Error [current]
[ 30.564472] sd 5:0:0:0: [sdc] tag#20 Add. Sense: Unrecovered read error - auto reallocate failed
[ 30.564478] sd 5:0:0:0: [sdc] tag#20 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 30.564483] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 30.564489] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 34.132519] sd 5:0:0:0: [sdc] tag#2 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 34.132524] sd 5:0:0:0: [sdc] tag#2 Sense Key : Medium Error [current]
[ 34.132528] sd 5:0:0:0: [sdc] tag#2 Add. Sense: Unrecovered read error - auto reallocate failed
[ 34.132533] sd 5:0:0:0: [sdc] tag#2 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 34.132538] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 34.132544] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 37.703540] sd 5:0:0:0: [sdc] tag#27 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 37.703546] sd 5:0:0:0: [sdc] tag#27 Sense Key : Medium Error [current]
[ 37.703551] sd 5:0:0:0: [sdc] tag#27 Add. Sense: Unrecovered read error - auto reallocate failed
[ 37.703556] sd 5:0:0:0: [sdc] tag#27 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 37.703562] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 37.703569] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 41.360310] sd 5:0:0:0: [sdc] tag#8 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 41.360316] sd 5:0:0:0: [sdc] tag#8 Sense Key : Medium Error [current]
[ 41.360321] sd 5:0:0:0: [sdc] tag#8 Add. Sense: Unrecovered read error - auto reallocate failed
[ 41.360326] sd 5:0:0:0: [sdc] tag#8 CDB: Read(10) 28 00 00 00 08 60 00 00 80 00
[ 41.360332] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x80700 phys_seg 4 prio class 0
[ 44.924135] sd 5:0:0:0: [sdc] tag#18 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 44.924137] sd 5:0:0:0: [sdc] tag#18 Sense Key : Medium Error [current]
[ 44.924139] sd 5:0:0:0: [sdc] tag#18 Add. Sense: Unrecovered read error - auto reallocate failed
[ 44.924141] sd 5:0:0:0: [sdc] tag#18 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 44.924143] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 44.924147] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 48.514100] sd 5:0:0:0: [sdc] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 48.514102] sd 5:0:0:0: [sdc] tag#0 Sense Key : Medium Error [current]
[ 48.514103] sd 5:0:0:0: [sdc] tag#0 Add. Sense: Unrecovered read error - auto reallocate failed
[ 48.514105] sd 5:0:0:0: [sdc] tag#0 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 48.514107] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 48.514110] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 52.236288] sd 5:0:0:0: [sdc] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 52.236295] sd 5:0:0:0: [sdc] tag#0 Sense Key : Medium Error [current]
[ 52.236299] sd 5:0:0:0: [sdc] tag#0 Add. Sense: Unrecovered read error - auto reallocate failed
[ 52.236304] sd 5:0:0:0: [sdc] tag#0 CDB: Read(10) 28 00 00 00 08 60 00 00 80 00
[ 52.236310] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
[ 55.835811] sd 5:0:0:0: [sdc] tag#15 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 55.835813] sd 5:0:0:0: [sdc] tag#15 Sense Key : Medium Error [current]
[ 55.835815] sd 5:0:0:0: [sdc] tag#15 Add. Sense: Unrecovered read error - auto reallocate failed
[ 55.835816] sd 5:0:0:0: [sdc] tag#15 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 55.835818] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 55.835820] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 59.402621] sd 5:0:0:0: [sdc] tag#1 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 59.402632] sd 5:0:0:0: [sdc] tag#1 Sense Key : Medium Error [current]
[ 59.402640] sd 5:0:0:0: [sdc] tag#1 Add. Sense: Unrecovered read error - auto reallocate failed
[ 59.402646] sd 5:0:0:0: [sdc] tag#1 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 59.402651] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 59.402658] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 63.016353] sd 5:0:0:0: [sdc] tag#20 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 63.016359] sd 5:0:0:0: [sdc] tag#20 Sense Key : Medium Error [current]
[ 63.016364] sd 5:0:0:0: [sdc] tag#20 Add. Sense: Unrecovered read error - auto reallocate failed
[ 63.016369] sd 5:0:0:0: [sdc] tag#20 CDB: Read(10) 28 00 00 00 08 60 00 00 80 00
[ 63.016375] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x80700 phys_seg 7 prio class 0
[ 66.560332] sd 5:0:0:0: [sdc] tag#23 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 66.560338] sd 5:0:0:0: [sdc] tag#23 Sense Key : Medium Error [current]
[ 66.560342] sd 5:0:0:0: [sdc] tag#23 Add. Sense: Unrecovered read error - auto reallocate failed
[ 66.560347] sd 5:0:0:0: [sdc] tag#23 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 66.560353] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 66.560361] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 70.124615] sd 5:0:0:0: [sdc] tag#16 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 70.124621] sd 5:0:0:0: [sdc] tag#16 Sense Key : Medium Error [current]
[ 70.124626] sd 5:0:0:0: [sdc] tag#16 Add. Sense: Unrecovered read error - auto reallocate failed
[ 70.124631] sd 5:0:0:0: [sdc] tag#16 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 70.124637] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 70.124645] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 74.004331] sd 5:0:0:0: [sdc] tag#19 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 74.004337] sd 5:0:0:0: [sdc] tag#19 Sense Key : Medium Error [current]
[ 74.004342] sd 5:0:0:0: [sdc] tag#19 Add. Sense: Unrecovered read error - auto reallocate failed
[ 74.004348] sd 5:0:0:0: [sdc] tag#19 CDB: Read(10) 28 00 00 00 08 60 00 00 80 00
[ 74.004354] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x80700 phys_seg 8 prio class 0
[ 77.536284] sd 5:0:0:0: [sdc] tag#4 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 77.536290] sd 5:0:0:0: [sdc] tag#4 Sense Key : Medium Error [current]
[ 77.536295] sd 5:0:0:0: [sdc] tag#4 Add. Sense: Unrecovered read error - auto reallocate failed
[ 77.536300] sd 5:0:0:0: [sdc] tag#4 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 77.536307] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 77.536315] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 81.102006] sd 5:0:0:0: [sdc] tag#14 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 81.102012] sd 5:0:0:0: [sdc] tag#14 Sense Key : Medium Error [current]
[ 81.102016] sd 5:0:0:0: [sdc] tag#14 Add. Sense: Unrecovered read error - auto reallocate failed
[ 81.102022] sd 5:0:0:0: [sdc] tag#14 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 81.102028] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 81.102036] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 84.648144] sd 5:0:0:0: [sdc] tag#10 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 84.648150] sd 5:0:0:0: [sdc] tag#10 Sense Key : Medium Error [current]
[ 84.648155] sd 5:0:0:0: [sdc] tag#10 Add. Sense: Unrecovered read error - auto reallocate failed
[ 84.648160] sd 5:0:0:0: [sdc] tag#10 CDB: Read(10) 28 00 00 00 08 60 00 00 80 00
[ 84.648166] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x80700 phys_seg 8 prio class 0
[ 88.179608] sd 5:0:0:0: [sdc] tag#21 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 88.179614] sd 5:0:0:0: [sdc] tag#21 Sense Key : Medium Error [current]
[ 88.179619] sd 5:0:0:0: [sdc] tag#21 Add. Sense: Unrecovered read error - auto reallocate failed
[ 88.179624] sd 5:0:0:0: [sdc] tag#21 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 88.179630] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 88.179638] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 91.768345] sd 5:0:0:0: [sdc] tag#29 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 91.768351] sd 5:0:0:0: [sdc] tag#29 Sense Key : Medium Error [current]
[ 91.768356] sd 5:0:0:0: [sdc] tag#29 Add. Sense: Unrecovered read error - auto reallocate failed
[ 91.768361] sd 5:0:0:0: [sdc] tag#29 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 91.768367] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 91.768375] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 95.482507] sd 5:0:0:0: [sdc] tag#4 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 95.482509] sd 5:0:0:0: [sdc] tag#4 Sense Key : Medium Error [current]
[ 95.482511] sd 5:0:0:0: [sdc] tag#4 Add. Sense: Unrecovered read error - auto reallocate failed
[ 95.482513] sd 5:0:0:0: [sdc] tag#4 CDB: Read(10) 28 00 00 00 08 60 00 00 80 00
[ 95.482515] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x80700 phys_seg 8 prio class 0
[ 99.026302] sd 5:0:0:0: [sdc] tag#4 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 99.026304] sd 5:0:0:0: [sdc] tag#4 Sense Key : Medium Error [current]
[ 99.026306] sd 5:0:0:0: [sdc] tag#4 Add. Sense: Unrecovered read error - auto reallocate failed
[ 99.026308] sd 5:0:0:0: [sdc] tag#4 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 99.026309] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 99.026313] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 102.601011] sd 5:0:0:0: [sdc] tag#7 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 102.601013] sd 5:0:0:0: [sdc] tag#7 Sense Key : Medium Error [current]
[ 102.601015] sd 5:0:0:0: [sdc] tag#7 Add. Sense: Unrecovered read error - auto reallocate failed
[ 102.601016] sd 5:0:0:0: [sdc] tag#7 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 102.601018] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 102.601021] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 106.134232] sd 5:0:0:0: [sdc] tag#12 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 106.134239] sd 5:0:0:0: [sdc] tag#12 Sense Key : Medium Error [current]
[ 106.134243] sd 5:0:0:0: [sdc] tag#12 Add. Sense: Unrecovered read error - auto reallocate failed
[ 106.134249] sd 5:0:0:0: [sdc] tag#12 CDB: Read(10) 28 00 00 00 08 60 00 00 80 00
[ 106.134254] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x80700 phys_seg 8 prio class 0
[ 109.669801] sd 5:0:0:0: [sdc] tag#15 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 109.669803] sd 5:0:0:0: [sdc] tag#15 Sense Key : Medium Error [current]
[ 109.669805] sd 5:0:0:0: [sdc] tag#15 Add. Sense: Unrecovered read error - auto reallocate failed
[ 109.669807] sd 5:0:0:0: [sdc] tag#15 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 109.669809] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 109.669812] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 113.233887] sd 5:0:0:0: [sdc] tag#9 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 113.233889] sd 5:0:0:0: [sdc] tag#9 Sense Key : Medium Error [current]
[ 113.233890] sd 5:0:0:0: [sdc] tag#9 Add. Sense: Unrecovered read error - auto reallocate failed
[ 113.233892] sd 5:0:0:0: [sdc] tag#9 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 113.233894] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 113.233897] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 117.589661] sd 5:0:0:0: [sdc] tag#21 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 117.589663] sd 5:0:0:0: [sdc] tag#21 Sense Key : Medium Error [current]
[ 117.589665] sd 5:0:0:0: [sdc] tag#21 Add. Sense: Unrecovered read error - auto reallocate failed
[ 117.589666] sd 5:0:0:0: [sdc] tag#21 CDB: Read(10) 28 00 00 00 08 60 00 00 80 00
[ 117.589668] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x80700 phys_seg 8 prio class 0
[ 121.125681] sd 5:0:0:0: [sdc] tag#1 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 121.125684] sd 5:0:0:0: [sdc] tag#1 Sense Key : Medium Error [current]
[ 121.125685] sd 5:0:0:0: [sdc] tag#1 Add. Sense: Unrecovered read error - auto reallocate failed
[ 121.125687] sd 5:0:0:0: [sdc] tag#1 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 121.125689] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 121.125692] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 124.700361] sd 5:0:0:0: [sdc] tag#4 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 124.700364] sd 5:0:0:0: [sdc] tag#4 Sense Key : Medium Error [current]
[ 124.700367] sd 5:0:0:0: [sdc] tag#4 Add. Sense: Unrecovered read error - auto reallocate failed
[ 124.700370] sd 5:0:0:0: [sdc] tag#4 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 124.700372] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 124.700376] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 128.233924] sd 5:0:0:0: [sdc] tag#13 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 128.233930] sd 5:0:0:0: [sdc] tag#13 Sense Key : Medium Error [current]
[ 128.233935] sd 5:0:0:0: [sdc] tag#13 Add. Sense: Unrecovered read error - auto reallocate failed
[ 128.233940] sd 5:0:0:0: [sdc] tag#13 CDB: Read(10) 28 00 00 00 08 60 00 00 80 00
[ 128.233946] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x80700 phys_seg 8 prio class 0
[ 131.765877] sd 5:0:0:0: [sdc] tag#9 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 131.765883] sd 5:0:0:0: [sdc] tag#9 Sense Key : Medium Error [current]
[ 131.765888] sd 5:0:0:0: [sdc] tag#9 Add. Sense: Unrecovered read error - auto reallocate failed
[ 131.765893] sd 5:0:0:0: [sdc] tag#9 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 131.765899] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 131.765907] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 135.277835] sd 5:0:0:0: [sdc] tag#10 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 135.277841] sd 5:0:0:0: [sdc] tag#10 Sense Key : Medium Error [current]
[ 135.277845] sd 5:0:0:0: [sdc] tag#10 Add. Sense: Unrecovered read error - auto reallocate failed
[ 135.277851] sd 5:0:0:0: [sdc] tag#10 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 135.277856] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 135.277865] Buffer I/O error on dev sdc1, logical block 20, async page read
richard@charged-particle:~$

The partition mentioned in the log file is sdc1.

Open a terminal windows and run the command

sudo fsck.ext4 /dev/sdc1

Let's see whether it is possible to rescue the partition and its contents.

You were up early Manfred,

here are the results:-

ichard@charged-particle:~$ sudo fsck.ext4 /dev/sdc1
[sudo] password for richard:
e2fsck 1.45.5 (07-Jan-2020)
fsck.ext4: Attempt to read block from filesystem resulted in short read while trying to open /dev/sdc1
Could this be a zero-length partition?
richard@charged-particle:~$

I don't think that they are zero length.

More info:-

richard@charged-particle:~$ sudo fsck.ext4 /dev/sdc1
[sudo] password for richard:
e2fsck 1.45.5 (07-Jan-2020)
fsck.ext4: Attempt to read block from filesystem resulted in short read while trying to open /dev/sdc1
Could this be a zero-length partition?
richard@charged-particle:~$ sudo fsck.ext4 /dev/sdc2
e2fsck 1.45.5 (07-Jan-2020)
fsck.ext4: Attempt to read block from filesystem resulted in short read while trying to open /dev/sdc2
Could this be a zero-length partition?
richard@charged-particle:~$ sudo fsck.ext4 /dev/sdc5
e2fsck 1.45.5 (07-Jan-2020)
Linux_Partiton5_: clean, 621/59080704 files, 84817700/236295424 blocks
richard@charged-particle:~$ sudo fsck.ext4 /dev/sdc6
e2fsck 1.45.5 (07-Jan-2020)
/dev/sdc6: clean, 11/29818880 files, 2151561/119250432 blocks
richard@charged-particle:~$

What is (or should be) on /dev/sdc1?

What is the output of

sudo fdisk -l /dev/sdc

What is (or should be) on /dev/sdc1? Now, nothing of consequence, as far as I know.

What is the output of

sudo fdisk -l /dev/sdc

richard@charged-particle:~$ sudo fdisk -l /dev/sdc
[sudo] password for richard:
Disk /dev/sdc: 1.84 TiB, 2000398934016 bytes, 3907029168 sectors
Disk model: WDC WD20PURX-64P
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0xbf03cfb1

Device Boot Start End Sectors Size Id Type
/dev/sdc1 2048 1062661583 1062659536 506.7G 83 Linux
/dev/sdc2 1062662142 3907028991 2844366850 1.3T 5 Extended
/dev/sdc5 2016665600 3907028991 1890363392 901.4G 83 Linux
/dev/sdc6 1062662144 2016665599 954003456 454.9G 83 Linux

Partition 2 does not start on physical sector boundary.
Partition table entries are not in disk order.
richard@charged-particle:~$

Can we re format all of sdc?

This would be Ok.

Of course it is possible to re-format the whole sdc disk, eventually better just the sdc1 partition (that should leave sdc5 and sdc6 intact)

Another attempt, what is the output of the commands

sudo dumpe4fs /dev/sdc1
sudo fsck.ext4 -v /dev/sdc1

richard@charged-particle:~$ sudo dumpe4fs /dev/sdc1
[sudo] password for richard:
sudo: dumpe4fs: command not found
richard@charged-particle:~$ sudo fsck.ext4 -v /dev/sdc1
e2fsck 1.45.5 (07-Jan-2020)
fsck.ext4: Attempt to read block from filesystem resulted in short read while trying to open /dev/sdc1
Could this be a zero-length partition?
richard@charged-particle:~$

sorry my fault

sudo dumpe2fs /dev/sdc1

richard@charged-particle:~$ sudo dumpe2fs /dev/sdc1
dumpe2fs 1.45.5 (07-Jan-2020)
dumpe2fs: Attempt to read block from filesystem resulted in short read while trying to open /dev/sdc1
Couldn't find valid filesystem superblock.
richard@charged-particle:~$

A last test:

What is now the output of

dmesg | tail -n 30

I assume that each of the attempts to access the partition has created a failure entry in the system logs.

richard@charged-particle:~$ dmesg | tail -n 30
[ 8585.093846] ata6.00: exception Emask 0x0 SAct 0x40000 SErr 0x0 action 0x0
[ 8585.093854] ata6.00: irq_stat 0x40000008
[ 8585.093860] ata6.00: failed command: READ FPDMA QUEUED
[ 8585.093871] ata6.00: cmd 60/08:90:a0:08:00/00:00:00:00:00/40 tag 18 ncq dma 4096 in
                        res 41/40:00:a0:08:00/00:00:00:00:00/40 Emask 0x409 (media error) <F>
[ 8585.093875] ata6.00: status: { DRDY ERR }
[ 8585.093879] ata6.00: error: { UNC }
[ 8585.095125] ata6.00: configured for UDMA/133
[ 8585.095147] sd 5:0:0:0: [sdc] tag#18 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 8585.095153] sd 5:0:0:0: [sdc] tag#18 Sense Key : Medium Error [current]
[ 8585.095157] sd 5:0:0:0: [sdc] tag#18 Add. Sense: Unrecovered read error - auto reallocate failed
[ 8585.095163] sd 5:0:0:0: [sdc] tag#18 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 8585.095168] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 8585.095177] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 8585.095208] ata6: EH complete
[ 8588.605794] ata6.00: exception Emask 0x0 SAct 0x1000 SErr 0x0 action 0x0
[ 8588.605802] ata6.00: irq_stat 0x40000008
[ 8588.605808] ata6.00: failed command: READ FPDMA QUEUED
[ 8588.605819] ata6.00: cmd 60/08:60:a0:08:00/00:00:00:00:00/40 tag 12 ncq dma 4096 in
                        res 41/40:00:a0:08:00/00:00:00:00:00/40 Emask 0x409 (media error) <F>
[ 8588.605823] ata6.00: status: { DRDY ERR }
[ 8588.605827] ata6.00: error: { UNC }
[ 8588.607079] ata6.00: configured for UDMA/133
[ 8588.607100] sd 5:0:0:0: [sdc] tag#12 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 8588.607105] sd 5:0:0:0: [sdc] tag#12 Sense Key : Medium Error [current]
[ 8588.607110] sd 5:0:0:0: [sdc] tag#12 Add. Sense: Unrecovered read error - auto reallocate failed
[ 8588.607116] sd 5:0:0:0: [sdc] tag#12 CDB: Read(10) 28 00 00 00 08 a0 00 00 08 00
[ 8588.607121] blk_update_request: I/O error, dev sdc, sector 2208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[ 8588.607129] Buffer I/O error on dev sdc1, logical block 20, async page read
[ 8588.607162] ata6: EH complete
richard@charged-particle:~$

The output is more or less what I expected.

It seems that (at least) one block in the partition master data cannot be read any more.
This causes that the system does no more have sufficient information for accessing the partition.

I do not know any possibility to recover the current sdc1 partition. I assume the best step is deleting the broken partition (e.g. by using fdisk, or the disk management program).

I cannot predict whether it will be possible to re-use the space where the error occurred.

From memory I think that there were some Bad Sectors on sdc drive.

Could you suggest disk management program please?

Thank you very much for trying.

Rich.b

What would I type in terminal to run fdisk?

"What would I type in terminal to run fdisk?"

sudo fdisk /dev/sdc

and then execute the appropriate commands as shown in the program.
m ... list all commands
p ... print partition table
d ... delete a partition
q ... quit
w ... write changes to disk
etc., depending on what you want to do and which response you get.

And with "disk management program" I meant the one that you used for the image in comment #2

Thank you Manfred for your help, it has been a good learning curve.

best regards,

Rich.b