- iSCSI The Open-E Way
- Acard's Small Business RAID Appliance
- Safer 6 for RAID Controllers
- A New RAM Hard Drive from HyperOs
- RAID on Rye
- PCI Express Battles PCI-X
- SATA Spells Trouble for SCSI RAID: Five Controllers Put to the Test
- Thecus N4100 Brings Storage Space To Your LAN
- Can Gigabyte's i-RAM Replace Existing Hard Drives?
- Accelerated Compact Flash: The Addonics SATA CF Adapter
- Need help building a Photo/Video editing system
- Need a server for data processing
- How do you build a dual xeon system?
- What is the largest case out there?
- WD Raptor 150GB Not A Good Value!!
- Im Spending $15,000!! What to get?
- What is best OC'ing MoBo with at least 8-phase power
- New Motherboard Help (need one w/ express 8x slot)
- The Southbridge Battle: nforce 6 MCP vs. ICH7 vs. ICH8
- P5E-WS: ESATA speed
SAS
Source: Tom's Hardware US – Keywords: sas, storage
Syndication:
SAS

The signaling equals to what is used in SATA. Source: Adaptec.
Here comes the neat thing: Serial Attached SCSI supports both SCSI and SATA, which enables SAS controllers to run either SAS or SATA devices (or both). However, SAS devices cannot be operated on SATA controllers because the Serial SCSI Protocol (SSP) is used. Like SATA, SAS follows the principle of point-to-point links to the drives (currently 300 MB/s), while there is the option to use SAS expanders for attaching more drives than SAS ports available. SAS hard drives are dual-ported, each featuring his unique SAS ID, which means that it is possible to use two physical data connections to provide redundant data paths to two different hops/hosts. Thanks to STP (SATA Tunneling Protocol), SAS controllers will still be able to talk to SATA drives that are attached to an expander.

Source: Adaptec

Thank you for the SAS lesson.