wikiSerial Attached SCSI Standards Overview
Serial Attached SCSI (SAS) is a serial interface to transfer data from computer systems to storage devices such as hard drives or tape drives. SAS is the successor to the earlier parallel SCSI interface.
SAS Standards
| 3Gb/s SAS (SAS-1) |
6Gb/s SAS (SAS-2) |
12Gb/s SAS (SAS-3) | |
|---|---|---|---|
|
|
| |
| Raw bandwidth (Gbit/s) | 3 Gb/s | 6 Gb/s | 12 Gb/s |
| Raw bandwidth (Gbit/s) Wide Port (4 Ports) |
12 Gb/s | 24 Gb/s | 48 Gb/s |
| Encoding | 8b/10b | ||
| Transfer speed (MB/s) | 300 MB/s | 600 MB/s | 1.200 MB/s |
| Transfer speed (MB/s) Wide Port (4 Ports) |
1.200 MB/s | 2.400 MB/s | 4.800 MB/s |
| Discovery | by initiators | by SAS Expanders | |
| SATA compatible (operation of SATA HDDs on SAS bus) |
yes | ||
| Zoning | vendor-specific | T10 standardised | |
| Spread-Spectrum-Clocking | yes | ||
| Connection Multiplexing (3Gb/s in 6Gb/s) | yes[1] | ||
References
- ↑ Connection multiplexing increases link utilization when 3Gb/s SAS components are used in a 6Gb/s SAS infrastructure, An Evolutionary Step for SAS Technology (scsita.org)
External links
- T10 Working Drafts - Serial Attached SCSI (SAS) (t10.org)
- Serial attached SCSI (en.wikipedia.org)
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