Communication network analyzer SAS Sierra series

signalpower qualitybenchtop

Serial Attached SCSI (SAS) is a data transfer technology designed to move data to and from storage devices such as disk drives, host bus adapters (HBA), and expanders. SAS is a serialized enhancement and replacement to parallel SCSI. Since SAS ratification in 2004, and it’s move to 6Gbps in 2008, Teledyne LeCroy has continued to support and innovate with it’s industry leading protocol analysis and traffic generation capabilities. Serial Attached SCSI (SAS) is the next-generation replacement of SCSI Ultra320. SAS is a serialized protocol. The serial interface offers several benefits over the existing SCSI parallel bus; allowing for high availability, complex storage topologies, and a lower cost structure. High Availability: As with SATA, Serial Attached SCSI is a high-speed, point-to-point technology initially designed to operate at speeds up to 6Gb/sec. System designers have found that point-to-point serial connections are inherently more reliable than shared bandwidth parallel connections. As a result, point-to-point serial connections have become the preferred method for implementing high-availability systems. SAS based disk drives are dual ported, taking advantage of this feature. This is a key requirement of high-availability SANs that call for redundant paths to all devices in the system. Complex Storage Environments: SAS storage environments usually consist of a mixture of disk drives, host bus adapters and expanders. SAS allows for addressing of over 16,000 devices. SAS Expanders are routing devices that forward service requests between the source and destination devices.