I'm trying to reorganize VD on Dell R720xd without reboot.
iDRAC queues VD deletion for reboot time. A hack with installing LSI MegaRAID Storage Manager GUI refuses to delete VD saying "this is an os drive"
The drive is not mounted anywhere.
Turns our I had to delete all signs of partition tables from the VD, mine was GPT so I used gdisk /dev/, then used options
Command (? for help): x Expert command (? for help): z About to wipe out GPT on /dev/sdb. Proceed? (Y/N): Y GPT data structures destroyed! You may now partition the disk using fdisk or other utilities. Blank out MBR? (Y/N): Y
and then MegaRAID Storage Manager finally agreed to delete the VD..