Hard drives and other internal storage devices like CD/DVD drives connect to the motherboard, typically, with integrated disk controllers.
Hard Drive Connector Types
The controllers come in different types, they are:
- IDE/EIDE/PATA: These are the ATA connectors used to connect disk drives with CD/DVD drives
- SATA: serial ATA, the successor to ATA, SATA originally ran at 1.5 GB, today SATA ran at 3.0GB, there are internal and external SATA connectors, external SATA are called eSATA.
- SCSI: It offers more performance than SATA but costs more, used more on servers than any other disk technology, SCSI drives last longer, many types of SCSI standards.
Check the speeds of disk technology
- SATA/150 = 1200 MB/Sec
- SATA/300 = 2400mb/Sec
- SATA/600 = 6000mb/Sec
- Esata = 2400mb/sec
- Firewire 400 = 400mb/Sec
- Firewire 800 = 786mb/Sec
- USB 2.0 = 480mb/Sec
- Ultra 320 SCSI = 2560mb/Sec
What Is BIOS?
BIOS is very important part of the PC. BIOS stands for basic input/output system. BIOS tells the CPU how to communicate with the rest of the computer. If you have a Dell or HP computer they have their own BIOS.
What Is CMOS?
CMOS stands for complementary metal oxide semiconductor. CMOS is where BIOS hold its settings. When all the power is lost to the computer, the information in the CMOS is kept with the CMOS battery. If your CMOS battery is dead and your computer is powered off, the computer will boot back up and not know the time. It will be unable to boot. CMOS looks like a watch battery.
