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Revision A
Model Numbers / Configurations / Capacities
Table 2-4. VSM5-VTSS Model Numbers / Configurations / Capacities
Base
Model
Number
Disk Arrays
Configuration
Data Drives*
Total Capacity
Capacity
Feature
Code
PCap
Capacity
#
Published
Effective 4:1
Capacity
Actual
Effective 4:1
Capacity
‡
PCap
Utiliza-
tion
#
VSMB-465
2 x 13 + 2 + 1
(32 drives
*)
3737.6 GB
(1:1 uncompressed)
---------
14,950.4 GB
(4:1 compression)
Base model 330GB 1250GB 1320GB 8.8%
VC15 660GB 2500GB 2640GB 17.7%
VC16 1320GB 5000GB 5280GB 35.3%
VC21 1970GB 7500GB 7880GB 52.7%
VC18 2890GB 11,000GB 11,560GB 77.3%
VC19 3551GB 14,000GB 14,203GB 95.0%
VSMC-465
3 x 13 + 2 + 1
(48 drives*)
5606.4 GB
(1:1 uncompressed)
---------
22,425.5 GB
(4:1 compression)
Base model 4200GB 16,000GB 16,800GB 74.9%
VC22 4730GB 18,000GB 18,920GB 84.4%
VC23 5326GB 21,000GB 21,304GB 95.0%
VSMD-465
4 x 13 + 2 + 1
(64 drives
*)
7475.2 GB
(1:1 uncompressed)
---------
29,900.7 GB
(4:1 compression)
Base model 6040GB 23,000GB 24,160GB 80.8%
VC24 6570GB 25,000GB 26,280GB 87.9%
VC25 7101GB 28,000GB 28,406GB 95.0%
Notes:
• Abbreviations key: GB = gigabyte(s) (10
9
bytes); PCap = Physical Capacity Control feature
•
* 32-drive configuration = 26 data drives, 4 parity drives, 2 spare drives, 30 read actuators, and 13 write actuators;
48-drive configuration = 39 data drives, 6 parity drives, 3 spare drives, 45 read actuators, and 13 write actuators;
64-drive configuration = 52 data drives, 8 parity drives, 4 spare drives, 60 read actuators, and 13 write actuators.
•
#
PCAP utilization is the sum of PCap capacity divided by the uncompressed capacity of all data drives in a base
model. Example
: Model VSMB-465 with capacity feature VC15 has a PCap capacity of 660GB and a data drive ca-
pacity of 3737.6GB (13 drives), or a 17.7% utilization rate. PCap utilization is capped to a maximum of 95% to en-
sure at least 5% of data drive space is available for free space collection.
•
‡
Actual effective 4:1 capacity = PCap capacity with 4:1 compression, based on number of data drives per array
(13) x number of arrays (2, 3, or 4) x base capacity per drive (143.75GB).