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This question already has an answer here:

/bin/ls: cannot access cache-zch-5666-cache.txt: Input/output error
/bin/ls: cannot access cache-zch-4970-cache.txt: Input/output error
/bin/ls: cannot access cache-zch-4782-cache.txt: Input/output error
./   cache-zch-4782-cache.txt  cache-zch-5666-cache.txt
../  cache-zch-4970-cache.txt
root@host [/home2/investgr1/public_html/hello/cache/zch]# rm *
rm: cannot remove `cache-zch-4782-cache.txt': Input/output error
rm: cannot remove `cache-zch-4970-cache.txt': Input/output error
rm: cannot remove `cache-zch-5666-cache.txt': Input/output error
root@host [/home2/investgr1/public_html/hello/cache/zch]#
**

What does input/output error mean>?

How do I make sure that it's broken. So far only a few file. I am wondering if something more profound happen

Is there a way to prove to my provider that it's indeed a problematic SSD?

Also, can I try to just reformat the disk?

I am concern that there is a bad sector on that disk.

My host said:

We will only replace the drive if we can identify a problem with it. The permissions error you encountered is not an indicator of a failed drive.

If you require any further assistance feel free to update this ticket.

marked as duplicate by user26112, jasonwryan, slm, Anthon, rahmu Oct 5 '13 at 9:34

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • What does dmesg | tail say? – Warren Young Oct 5 '13 at 1:45
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Those input/output errors almost definitely indicate some sort of hardware failure.

Chances are that either your disk or RAM are failing. Stop writing to the SSD immediately. If necessary, backup the data on the SSD. It may be prudent to use a tool such as ddrescue. Then test your RAM.

  • How to test that the hard disk is okay? – user4951 Oct 5 '13 at 2:35
  • How to proof that it's indeed hardware failure. – user4951 Oct 5 '13 at 12:44
  • You can use smartctl to check for disk errors. – user26112 Oct 5 '13 at 14:26

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