This is short example how to view raid card and installed hard drives in dell poweredge 1750 server
root@dell:~# lspci -v | grep -i RAID
04:03.0 RAID bus controller: Dell PowerEdge Expandable RAID controller 4/Di (rev 02)
Kernel driver in use: megaraid


root@dell:~# megactl
a0 PERC 4/Di chan:2 ldrv:1 batt:good
a0d0 67GiB RAID 5 1x3 optimal
a0c0t0 33GiB a0d0 online
a0c0t1 33GiB a0d0 online
a0c0t2 33GiB a0d0 online

root@dell:~# megaraid-status
-- Arrays informations --
-- ID | Type | Size | Status
a0d0 | RAID 5 | 67GiB | optimal

-- Disks informations
-- ID | Model | Status | Warnings
a0c0t0 | MAXTOR ATLAS10K4_36SCA 33GiB | online
a0c0t1 | MAXTOR ATLAS10K4_36SCA 33GiB | online
a0c0t2 | MAXTOR ATLAS10K4_36SCA 33GiB | online
root@dell:~#