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Intel® RAID Modules RMSP3AD160F, RMSP3CD080F and RMSP3HD080E Hardware User Guide
2.9
Drive Support Limits
The next table describes the SAS/SATA drive support limits of the Intel® Tri-Mode RAID modules
Maximum virtual drives per module
Maximum drive groups per module
Maximum virtual drives per drive group
Maximum drives per drive group
Maximum physical devices per module
Maximum hot spares per module
Maximum spans per virtual drive
Maximum enclosures
** This setting is firmware-dependent.
2.10 Over temperature protection
The Intel® Tri-Mode RAID modules are designed to operate at a maximum 55 degrees Celsius with a
minimum of 200 LFM air flow, this ensures the internal ROC IC will operate at less than 105 Celsius. If for any
reason there's an overheating, the internal ROC over temperature protection circuitry will operate like this:
- If the ROC reaches 110 degrees Celsius, the over temperature LED is turned on, I/O is throttled and the
event "MR_EVT_CTRL_TEMP_ABOVE_OPTIMAL_RANGE" is be registered in the module's log.
- if the ROC temperature goes down below 105 degrees Celsius (mostly due to I/O throttling), the over
temperature LED is turned off, the event "MR_EVT_CTRL_TEMP_WITHIN_OPTIMAL_RANGE" is registered in
the module's log and I/O throttling is turned off.
- If the ROC reaches 116 degrees Celsius, the over temperature LED continues to lit, I/O continues to throttle,
the event "MR_EVT_CTRL_TEMP_CRITICAL " is registered in the module's log, then after 10 seconds of
operation the cache is flushed, pending I/Os are completed and the ROC enters into the "Montask" state, in
which state all I/Os stop except through the UART debugging interface.
Additionally the Intel® Tri-Mode RAID modules have an on-board temperature sensor which can be
monitored by the system's BMC. When the system's fan speed control is properly configured, the BMC
speeds up the fans in order to cool down a RAID module that reaches the configured upper temperature
limit.
More information on how to configure the system's fan speed control can be found in this
2.11 UART Interface
The Intel® Tri-Mode RAID modules include a UART interface for special debugging purposes. The UART
connector debug port requires a special cable and Intel support to gather detailed ROC/IOC status. The
UART connector uses the layout shown in the following table:
15
Table 5. SAS/SATA drive support limits
Specification
RSP3AD160F
RSP3CD080F
64
64
64
64
16
16
32
32
64
64
64
64
8
8
3**
3**
RSP3HD080E
32
32
16
32
63
63
8
2**
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