|
|
SATA desktop |
Enterprise SAS |
|
Evolution from |
Parallel ATA |
Parallel SCSI |
|
Driver Model |
Software transparent from Parallel ATA |
Software transparent from Legacy SCSI |
|
Performance(Access to Data) | ||
|
Latency + Seek Time |
13m / sec @7200 RPM |
5.7m / sec @ 15K RPM |
|
Rotational Vibration |
5 to 12 read/sec/sec |
21 rad/sec/sec |
|
Typical I/Os per sec/drive (no RV) |
77 |
3192 |
|
Typical I/Os per sec/drive (10 rad/sec) |
35 |
319 |
|
Typical I/Os per sec/drive (20 rad/sec) |
<7 |
310 |
|
Duplex Operation |
Half |
Full |
|
Connectivity/topology |
4 devices (no peer-to-peer) |
>16K devices, peer-to-peer |
|
Customaization | ||
|
Unique Code and Hardware |
Limited |
Extensive |
|
Variable Sector Sizes |
No |
No |
|
Mode Page Parameter Control |
No |
Yes |
|
Inquiry Data |
No |
Yes |
|
Diagnostic Pages |
No |
Yes |
|
Capacity Controls |
No |
Yes |
|
Indicators |
No |
Yes |
|
Activity LED |
No |
Yes |
|
Reliability | ||
|
MTBF |
600K/hrs |
1.2M/hrs |
|
Duty Cycle |
8 x 5 |
24 x 7 |
|
Interactive Error Management |
No |
Yes |
|
Internal Data Integrity Checks |
No |
IOEDC3 |
|
Dual Port |
No |
Yes |
|
Signal rate |
1.5Gb/s |
1.5Gb/s and 3.0Gb/s |