Promise Technology VTrack M-Class M200i - Manual (Page 125)

Chapter 4: Management with WebPAM PROe
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6. Check the SMART Log box to enable the Self-Monitoring, Analysis, and
Reporting System (SMART).
7. Enter a polling interval (1 to 1440 minutes) in SMART Polling Interval field.
8. Check the Coercion Enabled box to enable disk drive capacity coercion.
When disk drives of different capacities are used in the same array, coercion
reduces the usable capacity of the larger disk drive(s) in order to match the
smallest capacity drive.
For more information, see “Capacity Coercion” on page 252.
9. Select a coercion method from the Coercion Method dropdown menu. The
choices are:
• GB Truncate – (Default) Reduces the useful capacity to the nearest
1,000,000,000 byte boundary.
• 10GB Truncate – Reduces the useful capacity to the nearest
10,000,000,000 byte boundary.
• Group Rounding – Uses an algorithm to determine how much to
truncate. Results in the maximum amount of usable drive capacity.
• Table Rounding – Applies a predefined table to determine how much to
truncate.
10. Enter a time interval (1 to 12 seconds) in the Write Back Cache Flush
Interval field.
For more information, see “Cache Policy” on page 251.
11. Select a Cache Line Size (8KB or 64KB) from the Preferred Cache Line Size
dropdown menu.
For more information, see “Cache Line Size” on page 252.
12. Click the Submit button.
The changes take effect immediately.
Enclosures
The Enclosures–Information tab provides component information about the
VTrak subsystem enclosure, including:
• Enclosure ID number
• Number of power supply units
• Number of fans
• Number of blowers – Blowers are scroll fans, 2 in each cooling unit
• Number of physical drive slots – 15, 12 or 8 depending on the VTrak model
• Number of temperature sensors – The number of sensors varies among
VTrak models
• Number of voltage sensors – 3.3V, 5.0V, and 12.0V