IBM Midrange System DS4000 Series User Manual

Chapter 3. IBM System Storage DS4000 and DS5000 hardware 93
3.6 DS5000 series product comparison
This section will compare the DS5000 products.
3.6.1 DS5020 product comparison
Take a quick look at the specifications of the DS4700 and DS5020 (Figure 3-69), You see
significant improvements in many areas.
Figure 3-69 DS5020 / DS4700 specification comparison
While the max host ports (8) and drives (112) are the same, the DS5020’s 8 Gbps interfaces
and support for 1 Gbps iSCSI give it the connectivity advantage. The DS5020’s support for
self-encrypting drives (also referred to as FDE for full disk encryption) provide an clear
advantage.
The controller architecture is where we get the performance gains. It has a 80% faster
processor and 300% faster busses. The two items are key contributors to the DS5020’s
performance advantages, which are up to 67% higher.
A vendor neutral company called Storage Performance Council has done a performance test
on the DS5020. The results of this test can be found at the following address:
http://www.storageperformance.org/results
1,600 MB/s
50,000 IOPS
200,000 IOPS
2 GB / 4 GB
8 GB/s
PCI-Express x8 (4 GB/s)
Intel xScale1.2 GHx
112 FC/FDE/SATA
Four 4 Gb/s
Four 8 Gb/s FC; or Eight 8 Gb/s FC; or
Four 8 Gb/s FC & four 1 Gb/s iSCSI
D S 5 0 2 0
60%
25%
67%
300%
80%
980 MB/s
40,000 IOPS
120,000 IOPS
2 GB / 4 GB
2 GB/s
PCI-X (1GB/s)
Intel xScale667MHz
112 FC/SATA
Four 4 Gb/s
Four 4 Gb/s FC; or
Eight 4 Gb/s FC
D S 4 7 0 0
Host interfaces options
Dual-controller system
(unless noted)
Redundant drive channels
Max drives
RAID Processor
Bus Technology
Internal controller bandwidth
Cache memory (min/max)
Cache IOPS
Disk Read IOPS
Disk Read MB/s 1,600 MB/s
50,000 IOPS
200,000 IOPS
2 GB / 4 GB
8 GB/s
PCI-Express x8 (4 GB/s)
Intel xScale1.2 GHx
112 FC/FDE/SATA
Four 4 Gb/s
Four 8 Gb/s FC; or Eight 8 Gb/s FC; or
Four 8 Gb/s FC & four 1 Gb/s iSCSI
D S 5 0 2 0
60%
25%
67%
300%
80%
980 MB/s
40,000 IOPS
120,000 IOPS
2 GB / 4 GB
2 GB/s
PCI-X (1GB/s)
Intel xScale667MHz
112 FC/SATA
Four 4 Gb/s
Four 4 Gb/s FC; or
Eight 4 Gb/s FC
D S 4 7 0 0
Host interfaces options
Dual-controller system
(unless noted)
Redundant drive channels
Max drives
RAID Processor
Bus Technology
Internal controller bandwidth
Cache memory (min/max)
Cache IOPS
Disk Read IOPS
Disk Read MB/s

IBM Midrange System DS4000 Series Specifications

General

Brand	IBM
Model	Midrange System DS4000 Series
Category	Storage
Language	English