Login to any of the Controller Command line and run below command,
show events both detail
show events both error
Save above command line outputs to some nodepad (better in Notepad++) then search for the serial number of the drives which are in LEFTOVER state. That will give information of if any of the LEFTOVER drive having hardware error.
You haven't confirmed yet that vd0001 had dedicated spare configured or not because for RAID50 it's not possible that after 3 drive failed still your vdisk is up.
It's always recommended to take backup and do any further troubleshooting.
Clear metadata doesn't mean you will have data loss. It depends on which RAID your vdisk is configured. For example if your vdisk configured with RAID5 then more than one drive failed your vdisk will be down and chance of data loss but in this case vd0001 configured with RAID50 which means per sub-vdisk one drive fail allowed and you should have data access. 3rd drive failure will bring down the vdisk for RAID50.
You can perform clear metadata on LEFTOVER drive only in case of no hardware error exist on those drives otherwise you need to replace them.
Hope this helps!
Regards
Subhajit
I am an HPE employee
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