Advanced Industrial Computer XJ-SA26-224R Broszura - Strona 3
Przeglądaj online lub pobierz pdf Broszura dla Podwozie Advanced Industrial Computer XJ-SA26-224R. Advanced Industrial Computer XJ-SA26-224R 4 stron. Small form factor (sff) sas
Performance
Connectivity
Availability
Driver Model
Form Factor
Market Applications
Some of the markets that have desired these higher performance SFF SAS hard disk drives include digital
content delivery, medical imaging and the military. Before SAS technology was available, the majority of
medical imaging storage was Parallel SCSI based. To save a typical image file of 3GB in size, it would take
an average of 15 seconds or more. With scalable 3.0Gb/sec SAS technology and using 2.5" SFF hard disk
drives, thereby doubling the spindles' density (12x 3.5" HDD vs. 24x 2.5" SFF HDD in a 2U storage
enclosure), performance can be greatly improved. Each 3GB file can take less than half the amount of time.
This means greater turnover rate on the patients' data/records, which helps quicken the diagnosis and
subsystem treatment for patients. The end result is quicker recovery time. More patients can be seen
within a certain time frame. The ROI made with this SAS technology is realized much sooner than with
previous technologies and products.
For applications within the digital content delivery industry such as Video On Demand (VOD), having higher
throughput due to higher spindle density means less master copies are needed to serve the same amount
of viewers. The cost on the 2.5" SAS HDDs becomes relatively unimportant when compared to the huge
savings realized from reduced copying expenses.
SAS vs. SCSI vs. FC
SCSI
SAS
Parallel Bus
Full Duplex
3.2Gb/sec
3.0Gb/sec
Extensive Command
Extensive Command
Queuing
Queuing
No XOR Support
XOR Support
12m internal cable
>6m external cable
15 devices
128 devices
Arbitrated bus
Peer to peer
Interconnect not
Interconnect
compatible with
compatible with
SAS or SATA
SATA
Single port
Dual port
Multi initiator
Multi initiator
Hot swappable
Hot swappable
(80 pin)
Software not
Software transparent
transparent with
with parallel SCSI
SAS
3.5"
2.5" / 3.5"
Advanced Industrial Computer, Inc.
Xtore Extreme Storage
FC
Full Duplex
4.0Gb/sec
Extensive
Command
Queuing
XOR Support
6m external cable
>128 devices
Arbitrated loop
Not compatible
with SAS or
SATA
Dual port
Multi initiator
Hot swappable
Software
transparent with
parallel SCSI
3.5"
(Source: IDC)