SCSI
- Small Computer System Interface:- is a high performance parallel interface for
connected mass storage devices such as disk drives to a computer.
Originally
specificied using logic level (TTL) signals over ribbon cable to daisy chain
upto 8 devices, this standard has been enhanced over the years to include newer
voltage levels, higher speeds and more devices. The standard enables large
amounts of data to be requested using a small number of intelligent commands.
Dur to the popularity of this standard some manufacturers have developed
extenders which enable connection over a long distance, converters such as IDE
to SCSI, and routers which translate the SCSI interface and commands to
fibre channel compatible
signals.
Newer variations such as
Serial Attached SCSI
and Internet SCSI
preserve compatibility at the SCSI driver and command set level, but offer
different connection and routing methods.
...from
Megabyte's Storage
Dictionary | |
| . |
 |
the
Benefits of SAS (Serial Attached SCSI) for External Subsystems - article by
Adaptec
This introduction to Serial Attached SCSI gives you
an idea of the performance, compatibilities, applications and roadmap for this
new directly attached disk connection standard. With throughput capability
faster than 2Gbps Fibre-channel systems and faster than ultra320 SCSI - the new
SAS products not only provide an upward migration path for parallel SCSI
applications but also open the door to a new class of high performance high
reliability enterprise systems.
...read the article,
...Adaptec profile,
Serial Attached SCSI | |
| . |
 |
Testing
Storage Solutions - article by Extreme Protocol Solutions
In
the data storage industry, testing is generally considered a neccessary evil in
bringing a product to market and as a result often companies will do the bare
minimum neccessary in order to cross the item off its checklist. This article
by Roger Gagnon President / CEO
Extreme Protocol Solutions attempts to explain why testing is so
important to product validation and also to provide a concise methodology to
testing. ...read
the article,
...Extreme Protocol
Solutions profile, Storage
Testers | |
| . |
| . |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
Serial Attached SCSI - Delivering Flexibility to the
Data Center - article by LSI Logic and Maxtor
If you think
you already know SAS because you know SATA and traditional SCSI then think
again. Sometimes disruptive technologies wear an unassuming disguise. In
fiction, Clark Kent, Frodo Baggins and Buffy Summers at first seem harmless, but
we see them change into Superman, the Ring Bearer and the Slayer.
SAS
too comes cloaked in plain garb - with a physical layer which looks a lot like
SATA. But like the Incredible Hulk there are muscles rippling under that shirt -
and you would be wrong to dismiss SAS so lightly. There's a lot more inside this
interface than it says on the box as this informative article reveals. ...read the article,
...LSI Logic profile,
...Maxtor profile,
Serial Attached SCSI | |
| . |
Serial
Attached SCSI - Sound Byte
SAS technology enables SCSI interface
solutions beyond Ultra320 to the next-generation Direct Attach Storage
enterprise server, storage systems, and high-performance workstation markets
while retaining device-level backward compatibility. The SAS standard defines a
device-level enterprise storage interface incorporating SCSI command sets,
serial point-to-point interconnections, dual porting, increased addressability
and the ability to scale to small form factors. Because the SAS physical layer
is compatible with Serial ATA (SATA), users will have the choice of populating
their systems with SAS or SATA hard disk drives, or a combination of both.
...from
a joint press release by LSI
Logic and Tabernus | | |
