IBM SYSTEM STORAGE DS5000 - Manual (Page 7)

Digital Media Storage Solution Installation Guide 7
© Copyright 2010, IBM Corporation. All rights reserved.
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
• DS5020
• DS4700 • DS3400
• Future
DS3400 DS4700 DS5020
DS5100
base
performance
DS5300
enhanced
performance
Burst I/O rate
cache reads
(IOPS)
110,000 120,000 200,000 650,000 700,000
Sustained I/O rate
disk reads
21,000 39,250 50,000 76,000 170,000
Sustained I/O rate
disk writes
4,500 9,350 9,500 20,000 38,000
Drives 48 SAS/SATA 112 FC/SATA
112
FC/SATA/FDE
256
FC/SATA/FDE
448
FC/SATA/FDE
/SSD*
(480) SATA*
Burst throughput
cache read
1,600 1,550MB/s 3,700 MB/s 1,600MB/s 6,400 MB/s
Sustained
throughput
disk read
925 980MB/s 1,600 MB/s 1,600MB/s 6,400 MB/s
Sustained
throughput
disk write
720 850 MB/s 1,400 MB/s 1,300 MB/s 5,300 MB/s
Host ports 4 4 4 8 16