I have a Poweredge R900 server with Perc 6/i and a 3.5" x 5 backplane. I've been using (4) 600GB Dell SAS 15k drives in a RAID 10 configuration with no 5th drive. I just got around to adding a 5th drive to the server and I'm having problems getting the drive operational. I just want to add the 5th drive as JBOD (RAID 0) disk for backups. I've tried a 136GB Dell SAS 15K, a 2TB Western Digital RE4, and a 2TB Western Digital Black drive in the 5th slot with no luck. The lights on all three drives start out green but all three turn to a flashing amber during the boot process. If I go into the configuration settings (Ctrl-R) during the post the drives do not show up. My question is, what is most likely culprit? Is it the backplane, the Perc 6/i card, or the cables? Could it be that since I used RAID 10 I can't use the 5th slot?
Any help would be greatly appreciated.