Lenovo Storage S3200/S2200 Setup Guide
23
CAUTION:
Some 6-Gbps disks might not consistently support a 6-Gbps transfer rate. If this happens, the
system automatically adjusts transfers to those disks to 3 Gbps, increasing reliability and reducing error
messages with little impact on system performance. This rate adjustment persists until the controller is
restarted or power-cycled.
The S3200/S2200 controller enclosures support compatible Lenovo drive enclosures for adding storage.
Supported enclosure form factors include traditional 2U models (2U12 and 2U24). A summary overview of
drive enclosures supported by controller enclosures is provided herein.
Cabling diagrams in this section show fault-tolerant cabling patterns. Controller and expansion modules
are identified by
<enclosure-ID><controller-ID>
. When connecting multiple drive enclosures, use
reverse cabling to ensure the highest level of fault tolerance, enabling controllers to access remaining drive
enclosures if a drive enclosure fails.
For example, the illustration on the left in
Figure 13
on page 26 shows reverse cabling, wherein
controller 0A (i.e., enclosure-ID = 0; controller-ID = Able) is connected to expansion module 1A, with a
chain of connections cascading down (blue). Controller 0B is connected to the lower expansion
module (B) of the last drive enclosure in the chain, with connections moving in the opposite direction
(green). Cabling examples are provided on the following pages.
Connecting the S3200/S2200 controller to the 2U12 drive enclosure
The LFF E1012 12-drive enclosure, supporting 6 Gb internal disk drive and expander link speeds, can be
attached to a S3200/S2200 controller enclosure using supported mini-SAS to mini-SAS cables of 0.5 m
(1.64') to 2 m (6.56') length (see
Figure 12
on page 25).
Connecting the S3200/S2200 controller to the 2U24 drive enclosure
The SFF E1024 24-drive enclosure, supporting 6 Gb internal disk drive and expander link speeds, can be
attached to a S3200/S2200 controller enclosure using supported mini-SAS to mini-SAS cables of 0.5 m
(1.64') to 2 m (6.56') length (see
Figure 12
on page 25).
Connecting the S3200/S2200 controller to mixed model drive enclosures
The S3200/S2200 controllers support cabling of 6 Gb SAS link-rate SFF and LFF expansion modules—in
mixed model fashion—as shown in
Figure 13
on page 26. The simplified rear-panel views of the E1024
and E1012 are identical.
Cable requirements for storage enclosures
The S3200/S2200 enclosures support 6-Gbps or 3-Gbps expansion port data rates. Use only Lenovo
Storage or OEM-qualified cables, and observe the following guidelines (see
Table 4
on page 24):
•
When installing SAS cables to expansion modules, use only supported mini-SAS x4 cables with
SFF-8088 connectors supporting your 6 Gb application.
•
Qualified mini-SAS to mini-SAS 0.5 m (1.64') cables are used to connect cascaded enclosures in the
rack. The “mini-SAS to mini-SAS” cable designator connotes SFF-8088 to SFF-8088 connectors.
•
The maximum expansion cable length allowed in any configuration is 2 m (6.56').
•
Cables required, if not included, must be separately purchased.
•
When adding more than two drive enclosures, you may need to purchase additional cables,
depending upon number of enclosures and cabling method used.
•
You may need to order additional or longer cables when reverse-cabling a fault-tolerant configuration
(see
Figure 14
on page 27).
•
Use only Lenovo Storage or OEM-qualified cables for host connection:
• Qualified Fibre Channel SFP and cable options
• Qualified 10GbE iSCSI SFP and cable options
• Qualified 1 Gb RJ-45 SFP and cable options
