IBM DS5000, DS3000, DS4000 manual SAN Architecture must meet RPQ criteria, IBM Storage

SAN Architecture must meet RPQ criteria

•Limit number of paths for Xsan/StorNext clients to four

•This is to limit both complexity and the amount of time required to initialize clients on the SAN

•Redundant Meshed Fibre Channel SAN (cross-connected)

•RDAC MPP supports this configuration

•Some IBM documentation may seem to preclude this, but those documents are based on an old non-“mpp” version of RDAC

•Limits cause for failover to Controller failure

•Specific Firmware, software, and Operating System Levels

IBM Storage
•	DS5100/DS5300	•	DS3400
•	DS5020	•	Future
•	DS4700

DS3400

DS4700

DS5020

DS5100

base

performance

DS5300

enhanced performance

Burst I/O rate
cache reads	110,000		120,000		200,000		650,000		700,000
(IOPS)
Sustained I/O rate	21,000		39,250		50,000		76,000		170,000
disk reads
Sustained I/O rate	4,500		9,350		9,500		20,000		38,000
disk writes
									448
Drives		48 SAS/SATA		112 FC/SATA	112		256			FC/SATA/FDE
						FC/SATA/FDE		FC/SATA/FDE		/SSD*
										(480) SATA*
Burst throughput		1,600		1,550MB/s		3,700 MB/s		1,600MB/s		6,400 MB/s
cache read
Sustained
throughput		925		980MB/s		1,600 MB/s		1,600MB/s		6,400 MB/s
disk read
Sustained
throughput		720		850 MB/s		1,400 MB/s		1,300 MB/s		5,300 MB/s
disk write
Host ports		4		4		4		8		16
Digital Media Storage Solution Installation Guide									7
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