May 12, 20197 yr Short Story: I had a drive fail in my raid, one Parity drive, and I went to replace it with what I thought was a good drive, part way through the replacement the drive failed and I purchased a brand new drive as a replacement. Now the drive lists as empty with no contents after the nearly 20 hour rebuild. is there anything I can do to recover the data on the disk or is it lost for ever? what did I do wrong? so I don't repeat this in the next time, (the obvious is check the replacement drive BEFORE attempting to use it but is there anything else I could have done?)
May 12, 20197 yr Community Expert Did you at any point agree to format anything? Go to Tools - Diagnostics and attach the complete Diagnostics zip file to your next post.
May 12, 20197 yr Most common chain of events that results in this is hitting "Format" if/when a drive comes up as unmountable. Formatting on unRaid is no different than on any other OS -> it removes all data from the drive (or emulated drive)
May 12, 20197 yr Author I do not believe I formatted the drive. but it could have happened as a result of the second drive (Second bad drive).
May 12, 20197 yr Community Expert Looks like you have single parity and 8 data disks. Is that correct? The array has not been started since a reboot so there are some things I can't tell about your system, and of course we can't tell about anything that happened before the reboot since we don't have a syslog from then. What makes you think you had any bad disks at all? SMART for all of the connected disks looks OK. Possibly any disks you removed were fine also. Bad connections are very much more common than actual bad disks.
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