Hard Disk Drive
Hard disk drive stores all your data including operating system, applications, user files and documents. It is a non-volatile storage, which means the contents of the HDD is not lost if the PC is switched off.
There are three different types of HDD, which are IDE/ATA, SCSI, SATA (Serial ATA). Majority of home PCs are equipped with IDE Hard drives. SCSI hard drives are mostly included in servers and powerful workstations as they offer better data transfer rate which results in better performance than the IDE drives. However modern SATA drives are not far behind SCSI drives in terms of performance with the introduction of the newer SATA 300 drives.
Recently Solid State Drive (SSD) have gained popularity due their high performance, size, energy efficiency and no moving parts. They offer excellent performance and is ideal if you want to build a silent pc as it has no moving parts and completely silent. SSD drives are still very expensive compared to hard drives.
The price of IDE/SATA drives have fallen quite dramatically in the recent years. You can buy a very large drive for a competitive price. It is better to buy a drive which is quite large as it works out cheaper. A recommended entry level drive would be 120 GB to 250 GB. The major HDD manufacturers are IBM, Seagate, Maxtor, Samsung, Western Digital and Fujitsu. For our demonstration PC I have chosen a Maxtor ATA100 drive as shown below.
Recommended Hard drives:
Seagate Barracuda 3 TB HDD SATA 6 Gb/s NCQ 64MB Cache 3.5-Inch Internal Drive
WD Red 3 TB NAS Hard Drive: 3.5 Inch, SATA III, 64 MB Cache
Crucial m4 256GB 2.5-Inch Solid State Drive SATA 6Gb/s CT256M4SSD2