Features of SATA - Reduced cable size ( 7 wires instead of 40 or 80)
- Faster data transfer
- Hot swapping feature (replacing faulty component while system is running without disruption to the system)
- Hot plugging (addition of components while system is running to increase the functionality of the system)
SCSI Drive - SCSI (Pronounced "scuzzy") stands for Small Computer Systems Interface, and was originally developed to replace IDE before SATA was developed.
- SCSI is much faster than IDE but are a little more troublesome to configure than IDE and SATA and generally tend to be more expensive.
- They however spin at a higher rate in comparison to IDE and SATA ones. IDE and SATA drives generally spin at 7,200 rpm, whereas SCSI drives spin at 10,000 to 15,000 rpm.
SCSI Interface - Hard disk drives can connect externally to a computer. The drive is placed in a case called an enclosure that contains a port(s) on the back for connecting to the computer via a cable. For quite some time enclosures used USB or Firewire ports.
- Now, many support any combination of USB, Firewire, and External SATA (eSATA) ports on the same encasement. External SATA is far faster than USB and Firewire.
- To use it, a computer must also have an eSATA connector. If it doesn't, a card can be purchased with the interface on it. Enclosures are manufactured to match the form factor of particular drive.
- It’s a collection of hard disk in a self-contained unit. Typically used in a large network environment, SANs serve as pools of storage for the servers in the network.
- Compared to managing disks attached to each server, SANs improves system administration by treating all array of disk as a single resource makes disk maintenance and routine backups easier to schedule and control.
- To support disaster recovery, redundant SANs are deployed in separate locations, each as a copy of the other.
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