Hello,
I had 2 out of 9 HDDs with errors, so I decided to replace them, one at a time of course.
First I ran a parity check that ended with no errors.
Then I replaced one of the faulty HDDs.
I went through the usual interface that popped up about a missing disk and I assigned the replacement disk for that position and them started the array.
It started to rebuilt the array but after 2 hours I went to check if everything was fine only to find out that it was stuck at 25%.
The error counter kept rising on the parity disk and I couldn’t use any of my files on the NAS.
I could browse the files though, but not access them.
I gave it a chance for one more hour but since only the error counter kept rising I decided to Cancl the parity check and reboot. None of the commands responded through the interface. So I decided to power off manually and reboot.
It started again rebuilding the Parity from 0, and no access to the files.
For the moment it is progressing and I hope it will until the end but I would appreciate your insight.
Thanks