I inherited some DL360 systems which had P440ar Smart Array controller to which the OS drive and 7 data drives were attached.
My workload was a Software-based storage one (Ceph) so I really wanted the data disks to be JBOD.
I first configured the P440ar into HBA mode and I saw all the disks, and things basically worked but this was definitely not functionally stable when running Ceph benchmarks. (Note: I didn't encounter any
other disk-related problems, for instance when running Google stressapptest with disk based threads).
When I then configured the P440ar into 8 arrays of 1 disk each, with RAID 0 mode on each array, it worked fine, with no functional problems running Ceph benchmarks.
Why would HBA mode have problems? When I configure HBA mode on the P440ar, do I still have to do some setup on the embedded array controller on the system motherboard?
