Hello All;

My external HDD (USB) all the sudden stopped being recognized in my computer. In the BIOS it is being recognized buy shows as 0MB. I connected to my desktop via USB to TTL and used Putty terminal to see if I can run some commands. I soon as connect the HDD the following shows on the terminal:
The model of the actual HDD (the internal part) is Seagate Barracuda ST2000DM001 (2TB).
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C!▒닁0x40M
Spin Up
Trans.

Spin Up
SpinOK
Retry delay
Retry delay
SIM Error 5000 LBA 000000000002C0F5 FD 3811611F
RW Error 43110081
MCMainPOR: Start:
User Data Base 009AA9C0
Check MCMT Version: Current
MC026: Reconstruction: MCMT Reconstruction Start
[RSRS] 0000
Starting LBA of RW Request=0000003151 Length=00000762
ProcessRWError -Read- at LBA 0000003151 Sense Code=43110081
Retry delay
InitiateMarkPendingReallocateRequest for disc_lba: 0000003151!

ErrorSegment 0000
MultiReadXfrStatus 0000 0001 ErrorSegment 0000
MC001: Reconstruction: EXCEPTION: Segment Read Failed
MC002: Reconstruction: EXCEPTION: Error in Header
MC006: Reconstruction: EXCEPTION: Error in first Header Disc Sector
ReadFooters (Backwards): Segment 0000 SegmentStartLBA 0000003151 FooterLBA 0000321D
Sequ 00000001..................................
ReadFooters (Backwards): Segment 0001 SegmentStartLBA 0000003223 FooterLBA 000032EF
Sequ 00000001..................................
ReadFooters (Backwards): Segment 0002 SegmentStartLBA 00000032F5 FooterLBA 000033C1
Sequ 00000001..................................
ReadFooters (Backwards): Segment 0003 SegmentStartLBA 00000033C7 FooterLBA 00003493
Sequ 00000001..................................
ReadFooters (Backwards): Segment 0004 SegmentStartLBA 0000003499 FooterLBA 00003565
Sequ 00000001..................................
ReadFooters (Backwards): Segment 0005 SegmentStartLBA 000000356B FooterLBA 00003637
Sequ 00000001..................................
ReadFooters (Backwards): Segment 0006 SegmentStartLBA 000000363D FooterLBA 00003709
Sequ 00000001..................................
ReadFooters (Backwards): Segment 0007 SegmentStartLBA 000000370F FooterLBA 000037DB
Sequ 00000001..................................
ReadFooters (Backwards): Segment 0008 SegmentStartLBA 00000037E1 FooterLBA 000038AD
Sequ 00000001..................................
ReadFooters (Backwards): Segment 0009 SegmentStartLBA 00000038B3 FooterLBA 0000397F
Sequ 00000001..................................
ReadFooters (Backwards): Segment 000A SegmentStartLBA 0000003985 FooterLBA 00003A51
Sequ 00000001..................................
ReadFooters (Backwards): Segment 000B SegmentStartLBA 0000003A57 FooterLBA 00003B23
Sequ 00000001..................................
ReadFooters (Backwards): Segment 000C SegmentStartLBA 0000003B29 FooterLBA 00003BF5
Sequ 00000001..................................
ReadFooters (Backwards): Segment 000D SegmentStartLBA 0000003BFB FooterLBA 00003CC7
Sequ 00000001..................................
ReadFooters (Backwards): Segment 000E SegmentStartLBA 0000003CCD FooterLBA 00003D99
Sequ 00000001..................................
ReadFooters (Backwards): Segment 000F SegmentStartLBA 0000003D9F FooterLBA 00003E6B
Sequ 00000001..................................
ReadFooters (Backwards): Segment 0010 SegmentStartLBA 0000003E71 FooterLBA 00003F3D
Sequ 00000001..................................
ReadFooters (Backwards): Segment 0011 SegmentStartLBA 0000003F43 FooterLBA 0000400F
Sequ 00000001..................................
ReadFooters (Backwards): Segment 0012 SegmentStartLBA 0000004015 FooterLBA 000040E1
Sequ 00000001..................................
ReadFooters (Backwards): Segment 0013 SegmentStartLBA 00000040E7 FooterLBA 000041B3
Sequ 00000001..................................
ReadFooters (Backwards): Segment 0014 SegmentStartLBA 00000041B9 FooterLBA 00004285
Sequ 00000001..................................
ReadFooters (Backwards): Segment 0015 SegmentStartLBA 000000428B FooterLBA 00004357
Sequ 00000001..................................
ReadFooters (Backwards): Segment 0016 SegmentStartLBA 000000435D FooterLBA 00004429
Sequ 00000001..................................
ReadFooters (Backwards): Segment 0017 SegmentStartLBA 000000442F FooterLBA 000044FB
Sequ 00000001..................................
ReadFooters (Backwards): Segment 0018 SegmentStartLBA 0000004501 FooterLBA 000045CD
Sequ 00000001..................................
ReadFooters (Backwards): Segment 0019 SegmentStartLBA 00000045D3 FooterLBA 0000469F
Sequ 00000001..................................
ReadFooters (Backwards): Segment 001A SegmentStartLBA 00000046A5 FooterLBA 00004771
Sequ 00000001..................................
ReadFooters (Backwards): Segment 001B SegmentStartLBA 0000004777 FooterLBA 00004843
Sequ 00000001..................................
ReadFooters (Backwards): Segment 001C SegmentStartLBA 0000004849 FooterLBA 00004915
Sequ 00000001..................................
ReadFooters (Backwards): Segment 001D SegmentStartLBA 000000491B FooterLBA 000049E7
Sequ 00000001..................................
MC007: Reconstruction: EXCEPTION: Error in Header and ALL Footers
MC022: Reconstruction: HeadPtr was unwritten
MC024: Reconstruction: Completed:
[MCMTWS] Tail/Head 0000 0000
Starting LBA of RW Request=0000000000 Length=00000001
ProcessRWError -Read- at LBA 0000000000 Sense Code=43110081
Retry delay
InitiateMarkPendingReallocateRequest for disc_lba: 0000000000!

Recon SP: Read of 1st header sector failed, read last sector of header...
Recon SP: Reading Band - 001EA51D - 001EA99E
Starting LBA of RW Request=00001EA51D Length=00000481
ProcessRWError -Read- at LBA 00001EA51E Sense Code=43110081
ERC TO exceeded, orig value in us:FFFFFFFF
Update Mask - 00F528E8 - 00002408 - 01
Recon SP: Restore required.S23(01)[00000000001EA51D]v{00000008}qv{00000028}qv{00000008}qv{00000008}qv{00000008}qv{00000008}qv{00000008}qv{00000008}qv{00000008}qv{00000008}q
Starting LBA of RW Request=00001EA51D Length=00000481
ProcessRWError -Write- at LBA 00001EA51D Sense Code=C4090081[000000001D2FAA65]v{00000008}qv{00000008}qv{00000008}qv{00000008}qv{00000008}qv{00000008}qv{00000008}qv{00000008}qv{00000008}qv{00000008}q
FAILED to spare00000903!

LED:000000BD FAddr:00009E1C
Rst 0x40M
Spin Up
SpinOK
LED:000000BD FAddr:00009E1C
LED:000000BD FAddr:00009E1C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Then the last line keep repeating itself on the terminal every minute.
I have all my life on this HDD and I need to retrieve the data so badly.

Any help someone can offer will be greatly appreciated

MagCsd

Thank you, Spildit. I have not tried any command at all. the only thing I didn't is Ctrl+z, but that didn't do anything.

I was hoping to find a way of fixing it myself with some guidance from ppl on this forum. I'm still optimistic that I will receive some instructions to deal with this. hopeful.