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SAN Metrics - April 2011

April 2011

hp 3PAR InServ (Type 1 SAN storage)

Virtual Volumes

The hp 3PAR InServ storage arrays allocate space as "virtual volumes". These storage volumes only allocate real disk space when servers save data, they ignore blank space. Where traditional storage would also use up disk space on the blank areas, these virtual volumes do not. As many servers keep large amounts of blank space as "spare" capacity, this eventually results in a considerable saving, not because the extra disk hardware never needs to be purchased, but also because it would also normally take a lot of electricity to power it and cool it.

Array 1 - hp 3PAR InServ F400

Number of virtual volumes allocated: 169
Disk space reserved by virtual volumes: 19.3TB
Virtual disk space allocated: 65.2TB
Space saved over traditional storage: 70.4%

Array 2 - hp 3PAR InServ T800

Number of virtual volumes allocated: 169
Disk space reserved by virtual volumes: 19.5TB
Virtual disk space allocated: 63.3TB
Space saved over traditional storage: 69.2%

Monthly progress

The following graphs show the progress of disk space reservation during the month.

 Reserved space April 2011

 Graph 1: Disk space reserved by virtual volumes

 Virtual Volume space April 2011

 Graph 2: Virtual disk space allocated

Nexsan SATABeast (Type 2 Storage)

Storage Array - KAMEOSA

Volumes allocated 25
Total space used 25344.3 GB
Space available 6659.4 GB


Storage Array - SEKO

Volumes allocated 16
Total space used 32003.29 GB
Space available 0 GB


Storage Array - TANUKI

Volumes allocated 4
Total space used 32004.4 GB
Space available 0 GB


Storage Array - BASAN

Volumes allocated 2
Total space used 1024 GB
Space available 62986.4 GB


Sun/Storagetek (older SAN Storage)


Worksheet TOTAL Array1 Array2 Array3 Array4
Raw capacity total 189.52TB 68.29TB 46.03TB 23.95TB 51.26TB
Raw capacity allocated 162.93TB 63.85TB 39.36TB 18.98TB 40.75TB
Raw capacity unused 26.59TB 4.45TB 6.68TB 4.98TB 10.51TB
Volume groups allocated 122.91TB 53.57TB 30.62TB 14.51TB 30.28TB
Parity/Hot Spare allocated 33.96TB 10.28TB 8.74TB 4.48TB 10.47TB
Disks used 534 183 114 99 138
Disks spare 96 23 26 14 33
Storage Partitions licensed   16 64 16 16
Storage Partitions used   12 9 6 11
Storage Partitions available   4 55 10 5
Tray spaces 36 0 0 15 21

Departmental / group usage summary

 Storagetek Usage Feb 2011