I'm trying to create a raid 6 array on a VNX 5100 from EMC, however am unable to create one with 7 drives. We have 8 total, and I immediately carved one out for hot sparing, leaving me 7 data drives. I can create one with 6 or 8, not 7. I am also unable to make a raid with 5 drives, which leads me to believe that odd numbers of disks are not eligible for raid 6. Raid 5 gives me no such issues.
Raid 6 should not have a dependency on having an even number of drives. Its only dependency should be meeting the minimum number of 4 drives. Can anyone help me find a way around this?