There isn't much room left in the front of the server but HP has managed to squeeze in eight SFF hot-swap disk bays. We were supplied with two 300GB 6Gbps SAS drives but HP also offers near-line SAS models so you can focus on capacity and price rather than performance. Limited storage capacity is one of HP's weaknesses as you can't expand beyond eight internal drive bays. This is the same as for Fujitsu's RX600 S5 but both Dell's R910 and IBM's x3850 have enough room for up to sixteen SFF drives.
Pushing all the processors and memory up to the front of the server leaves a lot of space round back and HP has put it to very good use as expansion potential is the best of all. The drawer mates with a power distribution connector and a horizontal system board which takes up half the width of the chassis.
The system board has a dedicated slot for a vertical SPI board packed with masses of embedded features. It has a Smart Array P410i RAID controller and cache memory slot with a pair of SAS ports cabled directly to the drive backplane.
The review system included 1GB of HP's flash-backed write cache and the battery backup pack. The P410i supports mirrors, stripes and RAID-5 as standard and an advanced license pack adds RAID-6 support.
The SPI board has four Gigabit Ethernet ports and has a separate expansion slot for HP's dual port 10-Gigabit SFP module. Adding this upgrades the first two Ethernet ports to 10-Gigabit status without using a standard expansion slot.
