My 8TB WD Red drive died and half of my data is not showing.  I thought the parity drive would allow all me to access all my data.  Also it would not allow me to write to the share anymore until I rebooted.  I shutdown the system and hooked the drive up to a windows PC via USB.  I installed xfs linux drives and was not able to see any data.  In unRaid it has a red X next to the drive but also shows at the bottom  'Unmountable disk present disk 2' and gives me the option to format.  I am hoping when I get a new 8TB drive tomorrow it will rebuild everything back.  I thought this was supposed to work like Raid 5 in the sense of a failure you still can work and have all your data?  Anyone have any ideas about this why it isn't showing me all the data that was on the bad drive?

 

Thanks,

Edited March 19, 20206 yr by ViSioN

21 minutes ago, ViSioN said:

gives me the option to format. 

DO NOT DO THIS

 

21 minutes ago, ViSioN said:

I thought this was supposed to work like Raid 5 in the sense of a failure you still can work and have all your data?

It 100% does.  However, you have to remember that actual drive failures are extremely rare and the most common cause of "failures" is that the drive dropped offline (usually due to cabling issues).  Now, if we assume that something else happened like hard reboot and this happened in the middle of a write operation, then it is possible for the information that is contained within parity (or the other drives) is out of sync and resulting in the Unmountable Disk 2.  I'd actually take a wild guess that the Unmountable Disk 2 came up while the original drive was still present in the system.

 

You need to post your diagnostics.

For some reason it created tstorage-diagnostics-20200319-1919.zipo threads.  I upload the diag file in the other thread but I will put it in this one as well.  I tried deleting this one but I didn't go away.

User started another thread here, closing this one to avoid multiple replys to same issue.