On 2020-09-04 05:38, Simon Walter wrote:
On 9/4/20 3:50 PM, [email protected] wrote:
Well . . . I decided to run an fsck on the misbehaving harddrive. It
started off by identifying the errors and rewriting them and then went
through Free block counts, Inode bitmap differences and Free inodes
and directory count. Some snippets of the output are posted below. I
did not stick around to watch all of it so may have missed something.
It took a long time to sort itself!
Out of curiosity, was it connected via eSATA or USB? I forgot what
kind of dock you got.
The drive is still in the external case. Connection is USB with AC
adapter. Testing it on the dock would have been the next step. I did
finally get the dock out of the box but have not fired it up yet. I am
old, slow and methodical . . .
When it finished, I mounted the drive without issue and could read the
remaining directories and files. However the /media/xxxxxx/cstwo/600
directory mentioned in the original mounting error below was nowhere
to be found:
"Error when getting information for file '/media/xxxxxx/cstwo/600':
Input/output error."
It's possible that data is not actually gone and can be recovered if
you know what you are looking for. However, as you stated, you have a
copy of the data elsewhere.
A few posts after yours Hendrik suggested checking the lost and found
directory and in it I found 57 folders and 15798 other items totaling
16.6 GB. They are mostly edits from audacity (.au) and avidemux (in C).
Also some wav and mp3 and graphics stuff too. I couldn't find the
associated mpgs or isos and there seems to be some other things missing
here and there.
Everything in the lost and found can be deleted. Maybe if I do it in
small chunks, it won't explode. LOL!
Then I ran the SMART Short offline test and it completed without error
I have no idea how reliable the repaired drive is after this radical
surgery. Can it be written to or files deleted? Should I even try?
From my experience, SMART data is reliable. To give some idea, I have
experience with over a hundred disks since they started to include
SMART. So probably not that much compared to others on this list.
I would say there is no problem with the underlying disk and the
corruption occurred at the filesystem level, which is one reason an
entire directory is missing, rather than at the disk level. If you
want more assurance, run the long test. You can get some idea of how
quickly your drive is deteriorating by monitoring changes to the SMART
data (smartd). I've been able to predict failure before it happens.
It's never been sudden. So if your disk "PASSED" it's probably fine to
use it.
Modern disk drives will move your data to good sectors when it detects
failure looming in bad sectors. So head failure is an issue, and can
also be predicted by SMART data. Mishandling of drives is something
that SMART can't predict of course. ;)
Thanks for the useful info Simon. I will run the long SMART test later
today.
Best regards,
Simon
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