Best Practices for the Sun StorEdge 3510 and 3511 FC Arrays 27
1 Refer to Table 1 to determine how many physical drives can be included in one logical drive.
High-Availability DAS Tips and Techniques
■ A Sun StorEdge 3510 FC array with two controllers can be configured to support
up to eight host connections. The Sun StorEdge 3511 SATA array can be
configured to support up to 12 host connections. These connections can be used in
pairs for redundancy, individually or in any combination of both.
■ You will need to add SFP modules to support more than four host connections to
the array. For example, add two SFP modules to support six connections and add
four SFP modules to support eight connections.
■ Using two single-port 2-Gbit FC host adapters in a high-availability configuration
will make optimum use of a Sun StorEdge Fibre Channel array’s redundancy.
Mapping logical drive partitions to two paths while using multipathing software
provides the best redundancy.
■ For complete redundancy and high availability, use multipathing software such as
Sun StorEdge Traffic Manager. To configure multipathing:
■ Establish two connections between a server and a Sun StorEdge Fibre Channel
array.
■ Install and enable the software on the server.
Number of Disks 5 or more 12 or more 24 or more
Cache Optimization
(Sun StorEdge 3510 FC
Array)
Random or sequential Random or sequential Random or sequential
Cache Optimization
(Sun StorEdge 3511 SATA
Array)
Sequential Sequential Sequential
RAID Levels Application-dependent Application-dependent Application-dependent
Fibre connection option Loop only Loop only Loop only
Drive Configuration One or more logical drives
plus one or more global
spare
1
Two or more logical drives
plus two or more global
spares
1
Four or more logical drives
plus four or more global
spares
1
Host Adapters per
server
Two Single-Port 2-Gbit FC Two Single-Port 2-Gbit FC Two Single-Port 2-
Gbit FC
Traffic Manager Required Required Required
Storage Switches Not required Not required Not required
TABLE 9 Configuration Overview for High Availability DAS (Continued)
Single Server Configurations Dual Server Configurations Quad Server Configurations
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