SAS
(pronounced as separate letters) Short for Serial Attached SCSI, an evolution of parallel SCSI into a point-to-point serial peripheral interface in which controllers are linked directly to disk drives. SAS is a performance improvement over traditional SCSI because SAS enables multiple devices (up to 128) of different sizes and types to be connected simultaneously with thinner and longer cables; its full-duplex signal transmission supports 3.0Gb/s. In addition, SAS drives can be hot-plugged.
In topologies with more than two connected devices, SAS calls for the use of expander devices to allow for more than one hostto connect to more than one peripheral.
SAS devices can communicate with both SATA and SCSI devices (the backplanes of SAS devices are identical to SATA devices). A key difference between SCSI and SAS devices is the addition in SAS devices of two data ports, each of which resides in a different SAS domain. This enables complete failover redundancy as if one path fails, there is still communication along a separate and independent path.
Read Also:
- SASL
Acronym for Simple Authentication and Security Layer. Originating with RFC 2222, written by John Myers while at Netscape Communications, SASL is a method for adding authentication support to connection-based protocols. SASL takes effect when a protocol initiates a command for identifying and authenticating a user to a server. SASL also includes an option for negotiating […]
- SATA II
SATA II is the next set of SATA specifications after the initial SATA specification was written. SATA II specifications provide additional enhancements to SATA, delivered in increments. The first increment, called .SATA II: Extensions to SATA 1.0. was released in 2002 and focused on the immediate needs for the server and network storage segments. Additional […]
- SAX
Short for Simple API for XML, an event-based API that, as an alternative to DOM, allows someone to access the contents of an XML document. SAX was originally a Java-only API. The current version supports several programming language environments other then Java. SAX was developed by the members of the XML-DEV mailing list.
- SBA
Short for the U.S. Small Business Administration, a government agency that helps Americans start and manage small businesses by providing loans, disaster assistance, advocacy and training. One of the programs offered by the SBA is the Small Business Technology Transfer (STTR), in which specific Federal funding is set aside for award to small businesses in […]
- SBIR
Short for the Small Business Innovation Research program, a federal program that awards research and development funds to small businesses to encourage them to explore their technological potential and innovate new technologies that will be made commercially available to the public. The program is meant to help small businesses compete with large enterprises that have […]