Hello Gibbo2018,
I got the logs and analyzed the same as well.
Problem exists in drive at location 1.8. There are 90 medium error exist which is very high number and this drive will never allow vdisk reconstruction to gets completed. In order to reconstruct vdisk data all 14 drives need to be read properly by Controller then only able to reconstruct data inside 1.3 and 1.15 which are new drives and used as spare. Unfortunately other 13 drives looks fine but due to problem with 1.8 vdisk reconstruction not possible. You are lucky that still you are able to access data. Take Immediate data backup because 1.8 may fail anytime soon and that situation this vdisk can't be in recoverable situation because RAID6 can't survive with 3 drive missing.
Action Plan
1> Take immediate data backup
2> Delete vdisk named HyperV-Disk and volumes
3> Replace drive at location 1.8
4> Recreate vdisk named HyperV-Disk and respective volumes
5> Restore data from backup
6> Please closely monitor other vdisk as well because there are drive error seen at location 1.18, 1.20 and 1.23
As discussed over private chat this is accepted solution so kindly mark this forum as closed so that others can get the update as well.
Hope this helps!
Regards
Subhajit
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