Compaq dc7800 - Convertible Minitower PC User Manual

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Figure 3 Reliability: RAID 1 - Mirroring
RAID 5 with three hard drives
RAID 5 has been used in servers for many years and is one of the most common types of RAID. RAID 5
uses striping with parity data in distributed blocks across all member disks. Therefore, the mass storage
controller can simultaneously write new information to two hard drives and parity information to the third
hard drive, so if one hard drive fails, the RAID controller can rebuild all the information after the volume
degradation occurred. Hence, RAID 5 with three hard drives has similar performance to RAID 0 with two
hard drives, and the reliability of RAID 1 with a minimum of three hard drives.

Compaq dc7800 - Convertible Minitower PC Specifications

General

Chipset	Intel Q35 Express
Memory	Up to 8 GB DDR2 SDRAM
Form Factor	Convertible Minitower
Processor	Intel Core 2 Duo, Intel Pentium Dual-Core, Intel Celeron
Storage	SATA Hard Disk Drive or Solid State Drive
Graphics	Integrated Intel Graphics Media Accelerator 3100
Optical Drive	DVD-ROM, DVD+/-RW
Networking	Integrated Intel Gigabit Network Connection
Ports	USB 2.0, serial, parallel, VGA, audio in/out, PS/2
Audio	Integrated High Definition Audio
Operating System	Windows XP, Windows Vista
Expansion Slots	1 PCI Express x16, 3 PCI
Power Supply	365W standard efficiency or 80 PLUS power supply