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Hitachi AMS2500

I do not know much about the Hitachi AMS line, and have never worked on one (vendors should be alert to subtle, or not, hints). I point out this SAN storage system because Hitachi did submit a SPC benchmark report for it, with a price of about $1500 per 15K disk, amortizing the controller and supporting components.

Most SAN storage systems usually work out from $2,500 to $3,500 per 15K 73 or 146GB disk, and up to $6K per 450 or 600GB disk, which seems to be what SAN vendors like to push, with horrible performance consequences.

The Hitachi AMS has FC on the front-end and SAS on the back-end. The HP MSA 2000 and EMC Clariion AX also have SAS back-ends, but both are entry storage systems, in having limited backend ports. The Hitachi AMS is a mid-range comparable in bandwidth capability to the CX4 line. I reiterate that FC on the back-end is a major waste of money for less performance.

from HDS AMS 2000 web page

Adaptable Modular Storage 2000 Specifications: Host Ports

ComponentAdaptable Modular Storage 2500 Adaptable Modular Storage 2500DCAdaptable Modular Storage 2300 Adaptable Modular Storage 2100
Host port options
(per system)
16 Fibre Channel OR
8 Fibre Channel OR
8 iSCSI OR
4 iSCSI OR
8 Fibre Channel +
4 iSCSI
16 Fibre Channel OR
8 Fibre Channel OR
8 iSCSI OR
4 iSCSI OR
8 Fibre Channel +
4 iSCSI
16 Fibre Channel OR
8 Fibre Channel OR
8 Fibre Channel +
4 iSCSI
8 Fibre Channel OR
4 Fibre Channel OR
4 Fibre Channel +
4 iSCSI
Host interfacesFibre channel: 8Gbps
iSCSI: GigE, 10GigE
Fibre channel:
4Gb/sec iSCSI GigE
Fibre channel: 8Gbps
iSCSI: GigE, 10GigE
Fibre channel: 8Gbps
iSCSI: GigE, 10GigE
Maximum attached hosts through FC virtual ports2,0482,0482,0481,024
Hosts per port 128 128 128 128
Host Storage Domains Yes Yes Yes Yes

 

Adaptable Modular Storage 2000 Specifications: Physical Characteristics

Component Adaptable Modular Storage 2500 Adaptable Modular Storage 2300 Adaptable Modular Storage 2100
Number of controllers 2 2 2
Mirrored Data Cache 16GB or 32GB 8GB or 16GB 4GB or 8GB
Maximum LUNs 4096 4096 2048
Maximum LUN size 60TB 60TB 60TB
Maximum drives in controller tray 0 15 15
Maximum standard disk expansion trays (3U, 15 disks) 32 15 7
Maximum dense expansion trays (4U, 48 SATA/SAS 7200 rpm disks) 10 4 3
Maximum small form factor disk expansion trays (2U, 24 SAS 10K rpm disks) 20 9 6
Maximum internal raw capacity 1,417TB
(3TB, 7200 RPM, SATA)
276TB
(600GB, 10K RPM
or 15K RPM, SAS)
708TB (3TB, 7200 RPM, SATA)
138TB (600GB, 15K RPM, SAS)
469TB (3TB, 7200 RPM, SATA)
78TB (600GB, 15K RPM, SAS)
Disk drive options 300GB SAS (10K RPM, 2.5 in.)
600GB SAS (10K RPM, 2.5 in.)
300GB SAS (15K RPM, 3.5 in.)
600GB SAS (15K RPM, 3.5 in.)
3TB SATA II (7200 RPM, 3.5 in.)
2TB SAS (7200 RPM, 3.5 in.)
300GB SAS (10K RPM, 2.5 in.)
600GB SAS (10K RPM, 2.5 in.)
300GB SAS (15K RPM, 3.5 in.)
600GB SAS (15K RPM, 3.5 in.)
3TB SATA II (7200 RPM, 3.5 in.)
2TB SAS (7200 RPM, 3.5 in.)
300GB SAS (10K RPM, 2.5 in.)
600GB SAS (10K RPM, 2.5 in.)
300GB SAS (15K RPM, 3.5 in.)
600GB SAS (15K RPM, 3.5 in.)
3TB SATA II (7200 RPM, 3.5 in.)
2TB SAS (7200 RPM, 3.5 in.)
Self-encrypting disk drive options 600GB (15K RPM, 3.5 in.) 600GB (15K RPM, 3.5 in.) 600GB (15K RPM, 3.5 in.)
Internal Flash Drives 200GB (SAS) 200GB (SAS) 200GB (SAS)
Minimum-maximum number of drives 4-480 4-240 4-159 (7200 RPM, 3.5" SATA)
4-136 (15K RPM, 3.5" SAS)
Max number of flash drives 60 60 30
SAS links 32 16 16
RAID-0 Yes (SAS drives only) Yes (SAS drives only) Yes (SAS drives only)
RAID-1 Yes Yes Yes
RAID-1+0 Yes Yes Yes
RAID-5 Yes Yes Yes
RAID-6 Yes Yes Yes
Model upgrade options with data in place N/A 2500 2300 and 2100