How to recover a corrupted external exFAT hard drive This is a 3 TB external Seagate hard drive formatted in Mac's Disk Utility as a single non bootable exFAT partition. It got unplugged from the computer and now the computer is unable to read it.

sudo gpt -r -vv show /dev/disk4:

gpt show: disk4: mediasize=3000592977920; sectorsize=4096; blocks=732566645
gpt show: disk4: PMBR at sector 0
gpt show: disk4: Pri GPT at sector 1
gpt show: disk4: Sec GPT at sector 732566644
    start       size  index  contents
        0          1         PMBR
        1          1         Pri GPT header
        2          4         Pri GPT table
        6      76800      1  GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
    76806        250
    77056  732489472      2  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
732566528        112
732566640          4         Sec GPT table
732566644          1         Sec GPT header


Is it possible to recover the hard drive?

Update: I had to unplug and plug the external hard drive back in. It takes about 5 mins for computer to recognize the hard drive. The following screen pops up.


I ran the first aid from the disk utility app and the operation was successful but it still show the disk as uninitialized.

diskutil list:

/dev/disk4 (external, physical):
#:                       TYPE NAME                    SIZE       IDENTIFIER
0:                GUID_partition_scheme               *3.0 TB     disk4
1:                        EFI EFI                      314.6 MB   disk4s1
2:       Microsoft Basic Data SEA_EXFAT                3.0 TB     disk4s2


The hard drive doesn't show up in finder.

diskutil verifyVolume disk4s2:

Started file system verification on disk4s2 SEA_EXFAT
Verifying file system
File system check exit code is 1
Error: -69845: File system verify or repair failed
Underlying error: 1: Operation not permitted
I think the drive is already unmounted, if not then unmount it and do this 

try mounting in read only mode by doing this 

diskutil mountDisk readOnly /dev/disk2s1 


Check if the drive is hijacked by the system

ps aux | grep fsck


If you see your disk there hijacked then use this to kill this process

sudo pkill -f fsck


You should immediately see your drive at the finder's sidebar.