Non-Redundant DAS Tips and Techniques

TABLE 1 Configuration Overview for Non-Redundant DAS

	Single Server Configurations	Dual Server Configurations	Quad Server Configurations

Number of Servers	1	2	4
RAID Enclosures	1	1	1
Expansion Units	As needed	As needed	One or more
Number of Controllers	1	1	1
Number of Disks	5 or more	12 or more	24 or more
Cache Optimization	Random or sequential	Random or sequential	Random or sequential
RAID Levels	Application-dependent	Application-dependent	Application-dependent
Fibre connection	Loop only	Loop only	Loop only
option

Drive configuration	One or more logical drives
	plus one global spare

Two or more logical drives plus one global spare

Four or more logical drives plus one global spare

Disk Configuration	One or more logical drives
	plus one global spare

Two or more logical drives plus one global spare

Four or more logical drives plus one global spare

Host Adapters per	Single-Port 2-Gbit FC	Single-Port 2-Gbit FC	Single-Port 2-Gbit FC
server
Traffic Manager	Not required	Not required	Not required
Storage Switches	Not required	Not required	Not required

Non-Redundant DAS Tips and Techniques

■A Sun StorEdge 3510 FC array with a single controller can be configured to support up to four host connections. These connections can be used in pairs, individually, or in any combination of both.

■You will need to add SFP modules to support more than four host connections to the Sun StorEdge 3510 array. Add one SFP module to support three connections and add two SFP modules to support four connections.

■Using two single-port FC host bus adapters (HBAs) or a dual-port 2-Gbit FC HBA in single-server or dual-server configurations makes optimum use of the Sun StorEdge 3510 FC array’s performance. Mapping logical drive partitions to two paths while using multipathing software and load balancing provides the best performance.

Best Practices for the Sun StorEdge 3510 FC Array 13