First Aid error on internal HDD

[agswamy]

Imac running High Sierra internal HDD corrupted.
booted with OS on external HDD and ran First Aid...

Result: Disk Utility First Aid on Volume “Macintosh HD”

Repairing file system.
Volume is already unmounted.
Performing fsck_hfs -fy -x /dev/rdisk0s2
Checking Journaled HFS Plus volume.
Checking extents overflow file.
Checking catalog file.
The volume Macintosh HD could not be verified completely.
File system check exit code is 8.
Restoring the original state found as unmounted.
File system verify or repair failed.
Operation failed…



Result: Disk Utility First Aid on Volume “Govind's”

Repairing file system.
Volume was successfully unmounted.
Performing fsck_hfs -fy -x /dev/rdisk0s4
Checking Journaled HFS Plus volume.
Checking extents overflow file.
Checking catalog file.
Invalid index key
Missing thread record (id = 519201)
Incorrect block count for file 2018.09.18.G80.asl
(It should be 85 instead of 79)
The volume Govind's could not be verified completely.
File system check exit code is 8.
Restoring the original state found as mounted.
Problem -69842 occurred while restoring the original mount state.
File system verify or repair failed.
Operation failed…

 

[chscag]

Not much to go on since you didn't provide us with which iMac you have (year and model), however, it appears that the HDD is sick and likely needs to be replaced. Do you have a backup?

 

[agswamy]

Not much to go on since you didn't provide us with which iMac you have (year and model), however, it appears that the HDD is sick and likely needs to be replaced. Do you have a backup?

[doublepost=1538366015][/doublepost]It is imac 27inch late 2012 running high Sierra. Unfortunately I do not have a backup. Need help to fix this.

 

[chscag]

The 2012 27" iMac is difficult to get inside to change out the hard drive (if it's bad). What I suggest is to use a bootable external drive to see if you can gain access to the hard drive and copy off your data and try to make repairs. Either that or another Mac in Target Disk Mode to access your iMac. Sometimes those will work to get at your data but if the hard drive is bad and can't be accessed then you will need professional help.

If you would like to change out the hard drive yourself, go to www.ifixit.com and look up the instructions for swapping out the hard drive in that model.

 

[agswamy]

Thanks for replying...I used a bootable external drive and then only ran the first aid. The results are from that.

Is there a utility or diagnostic software which can repair the disk?

 

[chscag]

Yes, you can try Disk Warrior. I believe they have a trial version that you can download.

 

[keysofanxiety]

Thanks for replying...I used a bootable external drive and then only ran the first aid. The results are from that.

Is there a utility or diagnostic software which can repair the disk?

Run SMART Utility: https://www.volitans-software.com/apps/smart-utility/

If it says warning or failed, your hard-drive needs to be replaced. If it says Passed, it’s more than likely OK and you’ll be able to fix it with Disk Warrior.

 

[Fishrrman]

OP wrote:
"It is imac 27inch late 2012 running high Sierra. Unfortunately I do not have a backup. Need help to fix this."

Well, "the fix" would generally be:
1. Re-initialze and test the drive
2. Restore from your backup.

As mentioned above, you can try Disk Warrior.
Beyond that, again, the "first fix" would be to try to erase and restore the drive.

Does this make you reconsider the concept of "backing up"....?