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How many drives should be assigned for disk pool preservation capacity in a E-Series system?

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e-series-santricity-management-software
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Applies to

  • All E-Series Controllers
  • All E-Series Firmware

Answer

  • Number of drives reserved by default for preservation capacity when creating a Disk Pool in SANtricity:
Disk Pool Drive Count Default Number of Drives Reserved for Preservation Capacity 
11 1
12-31 2
32-63 3
64-127 4
128-191 6
192-255 7
256-384 8
  • Table can be used to determine number of drives required for preservation capacity for new disk pools or adding/removing drives to an existing disk pool
  • The number of drives assigned for preservation capacity will depend on user comfort level with amount of failures the disk pool can sustain before failing

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