Page 1:SAS Raises Storage Capabilities To Higher Power
Page 2:SCSI's Details And History
Page 3:From SATA...
Page 6:SAS Backplanes & Cables
Page 7:SAS As Part Of SAN Storage Solutions
Page 8:2.5" SAS Hard Drives
Page 9:Fujitsu MAY2073RC
Page 10:3.5" SAS Hard Drives
Page 11:Hitachi UltraStar 15K147 SAS (HUS151414VLS300)
Page 12:Maxtor Atlas 15KII
Page 13:Seagate Cheetah 15K.4B 147 GB (ST3146854SS)
Page 14:Host Adapters
Page 15:Adaptec SAS 48300
Page 16:RAID Adapters
Page 17:LSI Logic SAS3442X
Page 18:SAS Appliances And Enclosures
Page 19:Storage System
Page 20:Adaptec SANbloc S50 JBOD, Continued
Page 21:Test Setup
Page 22:Hard Drive Test Results
Page 23:3.5" SAS Data Transfer Diagrams
Page 24:Data Transfer Performance
Page 25:Access Time
Page 26:I/O Performance
Page 27:SAS RAID Test Results (4 And 10 Drive Arrays)
On the left side is the SATA data connector. The right connector is for the power supply. The number of pins is required to provide 3.3 V, 5 V and 12 V to each SATA device.
SATA is in its second generation and has been available for many years. SATA I defines a gross bandwidth of 1.5 Gb/s by using two serial links running low-voltage differential signalling, while 8/10-bit encoding at the physical layer (10 bits are transferred for 8 data bits) results in a maximum interface throughput of 150 MB/s. During the rollout of SATA at 300 MB/s, people started calling this acceleration SATA II, although the standardizing SATA-IO (International Organization) intended to add more features prior to calling it SATA II. The latest specification hence is SATA 2.5, and it includes SATA extensions such as Native Command Queuing (NCQ) and eSATA (external SATA), port multipliers (up to four drives per port) etc. However, SATA features are optional both on the controller and the hard drive side.
Hopefully, SATA III at 600 MB/s will stop growing by 2007.
While parallel ATA (UltraATA) cables were limited to 18" (46 cm), SATA cables may be up to 39" (1 m), with double the cable length for eSATA. Rather than 40 or 80 wires, only seven pins are required for serial data transmission. Obviously, SATA cables are pretty narrow, easy to run inside of systems and they will not restrict airflow either. There is only one device per SATA port, making the interface a point-to-point connection.
SATA connects data and power via separate plugs.
- SAS Raises Storage Capabilities To Higher Power
- SCSI's Details And History
- From SATA...
- SAS Backplanes & Cables
- SAS As Part Of SAN Storage Solutions
- 2.5" SAS Hard Drives
- Fujitsu MAY2073RC
- 3.5" SAS Hard Drives
- Hitachi UltraStar 15K147 SAS (HUS151414VLS300)
- Maxtor Atlas 15KII
- Seagate Cheetah 15K.4B 147 GB (ST3146854SS)
- Host Adapters
- Adaptec SAS 48300
- RAID Adapters
- LSI Logic SAS3442X
- SAS Appliances And Enclosures
- Storage System
- Adaptec SANbloc S50 JBOD, Continued
- Test Setup
- Hard Drive Test Results
- 3.5" SAS Data Transfer Diagrams
- Data Transfer Performance
- Access Time
- I/O Performance
- SAS RAID Test Results (4 And 10 Drive Arrays)