Hard Disk
There are a few ways in which a hard disk can connect/interface with:
- (A)dvanced (T)echnology (A)ttachment (Also known as IDE, ATAPI and Parallel ATA)
- (S)erial ATA
- SCSI(Small computer system interface)
ATA (IDE, ATAPI, PATA)
ATA is a common interface used in many personal computers before the emergence of SATA. It is the least expensive of the interfaces.Disadvantages
- Older ATA adapters will limit transfer rates according to the slower attached device (debatable)
- Only ONE device on the ATA cable is able to read/write at one time
- Limited standard for cable length (up to 18inches/46cm)
- Low costs
- Large capacity
SATA
SATA is basically an advancement of ATA.Disadvantages
- Slower transfer rates compared to SCSI
- Not supported in older systems without the use of additional components
- Low costs
- Large capacity
- Faster transfer rates compared to ATA (difference is marginal at times though)
- Smaller cables for better heat dissipation
SCSI
SCSI is commonly used in servers, and more in industrial applications than home uses.Disadvantages
- Costs
- Not widely supported
- Many, many different kinds of SCSI interfaces
- SCSI drives have a higher RPM, creating more noise and heat
- Faster
- Wide range of applications
- Better scalability and flexibility in Arrays (RAID)
- Backward compatible with older SCSI devices
- Better for storing and moving large amounts of data
- Tailor made for 24/7 operations
- Reliability
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