Additional cabling considerations, Table 3 – HP P2000 G3 MSA Array Systems User Manual
Page 26
26
Installing the enclosures
Table 3
SAS expansion cable requirements: controller module to expansion module connection
1
One 0.5m cable is required per controller module to I/O (expansion) module connection.
2
One 0.5m, 1.0m, or 2.0m cable is required per controller module to expansion module connection.
NOTE:
Additional cabling notes:
•
Cables required, if not included, must be separately purchased.
•
When adding more than two drive enclosures, you may need to purchase additional 1m or 2m cables:
• Spanning 3, 4, or 5 drive enclosures requires 1m cables.
• Spanning 6 or 7 drive enclosures requires 2m cables.
•
on page 27 and related footnotes for cabling multiple drive enclosures.
IMPORTANT:
Controller modules within the enclosure must be of the same type. Do not install an HP
P2000 G3 MSA System FC and HP P2000 G3 MSA System SAS controller module in the same chassis.
IMPORTANT:
Connecting 3Gb and 6Gb drive enclosures limits performance and should be done only
when upgrading legacy product configurations.
For additional information concerning cabling of P2000 G3 MSA System controllers and MSA2000 G1
or G2 drive enclosures, visit your HP MSA produc
ttp://www.hp.com/go/p2000
. From the HP
MSA products page, browse for the following reference documents:
•
HP P2000 G3 MSA Best practices
•
Upgrading the HP MSA2000 G2 to the P2000 G3 MSA
•
Upgrading the HP MSA2000 G1 to the P2000 G3 MSA
Additional cabling considerations
P2000 G3 MSA System controller enclosures (both LFF and SFF models) support each of the drive
enclosures listed above. However, when cabling supported drive enclosures of mixed type, consider the
following factors regarding components equipped with SAS2.0 and SAS1.1 expanders (labeled in
•
P2000 G3 MSA System controller enclosures support 6Gb and 3Gb drive enclosures.
•
To avoid performance limitations in a mixed-type drive enclosure environment, cable 3Gb drive
enclosures after 6Gb drive enclosures as shown in
on page 32. Do not mix 6Gb and 3Gb
disk drives in the same enclosure.
•
Performance will be limited if a 3Gb drive enclosure is cabled before a 6Gb drive enclosure
—
and
cannot be avoided
—
if reverse cabled. A 6Gb drive enclosure will perform at a 3Gbps data transfer
rate if cabled after a 3Gb drive enclosure.
•
If used together with mixed drive enclosures, an MSA2000 3Gb drive enclosure should be cabled after
other supported models, using straight-through cabling.
Product model-to-model storage component attachment
SAS Expansion (In/Out) cable data
Controller module
Drive enclosure
Type
Length Connectors
P2000 G3 (10GbE and 1Gb)
iSCSI MSA
P2000 6Gb drive enclosure
mini-SAS to mini-SAS
1
0.5m
6Gbps
D2700 6Gb drive enclosure
mini-SAS to mini-SAS
1
0.5m
6Gbps
MSA2000 3Gb drive enclosure mini-SAS to SAS
2
0.5m,
1m, 2m
6Gbps,
3Gbps
MSA70 3Gb drive enclosure
mini-SAS to mini-SAS
1
0.5m
6Gbps,
3Gbps