|
SAS 1.0/1.1 |
SAS 2.0 |
Features
|
Preserves legacy SCSI
SATA compatible |
3 Gb/s compatible
Improved signaling
Zoning management
Improved scalability |
Storage Features
|
RAID 6
Small form factors
HPC
High capacity SAS drives
Ultra320 SCSI replacement
Choice: SATA or SAS
Blade servers |
RAS (Data Protection)
Security (FDE)
Clustering
Larger Topologies
SSDs
Virtualization
External Storage
4K sector size |
| Line Rate and Cable Throughput |
4 x 3 Gb/s (1.2 GB/s) |
4 x 6 Gb/s (2.4 GB/s) |
Cable Type
|
Copper |
Copper |
Cable Length
|
8 m |
10 m |
MegaRAID
9210-8i
LSI’s second LSI 6 Gb/s card, the 9210-8i, is a host processor-driven HBA
rather than a dedicated hardware storage controller. This is a simple RAID
0/1/0+1 card that offers slightly higher throughput using all of our 16 Intel
X25-E flash SSDs. However, its I/O performance varies depending on CPU
performance.
Unfortunately, the 9210-8i was not listed on LSI’s Web site when we completed
this article, so there isn’t much we can say about it except that it also uses
x8 PCI Express 2.0 and has eight internal ports located on two mini-SAS
connectors.
Other SAS 6 Gb/s HBAs or RAID controllers have yet to arrive at our storage
test lab, although storage experts such as Adaptec, Areca, Atto, and others are
working on it.
The product situation is similar on the drive side. We’ve only received a
few SAS 6 Gb/s drives from Seagate and one from Hitachi. No one else has
provided any SAS 6 Gb/s hardware yet, but we know Fujitsu will follow soon.
We’ll mention important performance data for the drives presented on this
page, but save the full results for a forthcoming enterprise hard drive
roundup.
| |
capacities |
|
|
cache memory |
interface |
|
|
| Hitachi Ultrastar C10K300 |
147GB and 300GB |
10,000 RPM, |
2.5” |
64MB |
SAS 2.0 6.0Gb/s |
enterprise
|
 |
| Savvio 15K.2 |
147, 73GB |
15,000 RPM |
2.5” |
16MB |
SAS 2.0 6.0Gb/s |
ST9146852SS
ST973452SS |
 |
| Savvio 10K.3 |
300, 146GB |
10,000 RPM |
2.5” |
16MB |
SAS 2.0 6.0Gb/s |
ST9300603SS
ST9146803SS |
 |
| Cheetah
15K.7 |
600, 450, 300GB |
15,000 RPM |
3.5” |
16MB |
SAS 2.0 6.0Gb/s |
|
 |
| Cheetah
NS.2 |
600, 450, 300GB |
10,000 RPM |
3.5” |
16MB |
SAS 2.0 6.0Gb/s |
low-power |
 |
| Savvio 15K |
72, 36GB |
15,000 RPM |
2.5” |
16MB |
SAS 3Gb/s |
|
|
| Cheetah 15K.6 |
450, 300, 146GB |
15,000 RPM |
3.5” |
16MB |
SAS 3Gb/s |
|
|
| Cheetah 15K.5 |
300 146.8 73.4 |
15,000 RPM |
3.5” |
16MB |
SAS 3Gb/s |
|
|
