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Measures reported by TPDCagStTest
Drive Chassis, also referred to as Drive Cages are intelligent, switched, hyper-dense drive enclosures that serve as the capacity building block within the HP 3PAR Storage system. A single HP 3PAR Storage system can accommodate up to 48 Drive Chassis and scale from 16 to 1,920 drives online and non-disruptively. Each Drive Chassis consumes four EIA rack units in a 19-inch rack. Each Drive Chassis can be loaded with ten drive magazines holding four one-inch high drives. Because each Drive Chassis can hold up to 40 drives, a single Drive Chassis can pack up to 80 TB of data in just seven inches of rack space when using 2-TB Nearline (enterprise SATA) disk drives.
Each Drive Chassis may contain one or more physical drive types:
Solid State Drives (SSDs) to meet even the most stringent performance demands Fiber Channel disk drives to meet high performance or capacity demands Nearline (enterprise SATA) disk drives to meet capacity demands at the lowest cost
If one or more drive chassis fails, the capacity of the storage system may be reduced drastically thus lowering the overall efficiency of the storage system. In order to maintain the efficiency of the storage system, it is important for the administrators to constantly monitor the health and operational state of each drive chassis in the HP 3PAR Storage system The TPDCagStTest test helps administrators in this regard.
This test auto discovers the drive chassis i.e., drive cages of the HP 3PAR storage system and for each drive cage, this test reports the health and operational state. In addition, this test helps administrators to identify the type of each drive cage and its enclosure ID.
The measures made by this test are as follows:
| Measurement |
Description |
Measurement Unit |
Interpretation |
| healthState |
Indicates how healthy this cage currently is. |
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The values that this measure can report and their corresponding numeric values are discussed in the table below:
| Numeric Value |
Measure Value |
| 0 |
OK |
| 1 |
Unknown |
| 2 |
Degraded/Warning |
| 3 |
Minor failure |
| 4 |
Major failure |
| 5 |
Critical failure |
| 6 |
Non-recoverable error |
Note:
By default, this measure reports the Measure Values discussed above to indicate the state of a cage. The graph of this measure however, represents the state of the batteries using the numeric equivalents only. |
| operationalStatus |
Indicates the current operational state of this cage. |
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The values that this measure can report and their corresponding numeric values are discussed in the table below:
| Numeric Value |
Measure Value |
| 0 |
OK |
| 1 |
In Service |
| 2 |
Power Mode |
| 3 |
Completed |
| 4 |
Starting |
| 5 |
Dormat |
| 6 |
Other |
| 7 |
Unknown |
| 8 |
Stopping |
| 9 |
Stressed |
| 10 |
Stopped |
| 11 |
Supporting Entity in Error |
| 12 |
Degraded or Predicted Failure |
| 13 |
Predictive Failure |
| 14 |
Lost Communication |
| 15 |
No Contact |
| 16 |
Aborted |
| 17 |
Error |
| 18 |
Non-Recoverable Error |
Note:
By default, this measure reports the Measure Values discussed above to indicate the operational state of a cage. In the graph of this measure however, operational states are represented using the numeric equivalents only. |
| detailedStatus |
Describes the current operational state of this cage. |
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This measure will be reported only if the API provides a detailed operational state.
Typically, the detailed state will describe why the cage is in a particular operational state. For instance, if the operationalStatus measure reports the value Stopping for a cage, then this measure will explain why the cage is being stopped.
The values that this measure can report and their corresponding numeric values are discussed in the table below:
| Numeric Value |
Measure Value |
| 0 |
Online |
| 1 |
Success |
| 2 |
Power Saving Mode |
| 3 |
Write Protected |
| 4 |
Write Disabled |
| 5 |
Not Ready |
| 6 |
Removed |
| 7 |
Rebooting |
| 8 |
Offline |
| 9 |
Failure |
Note:
By default, this measure reports the Measure Values discussed above to indicate the detailed operational state of a cage. In the graph of this measure however, detailed operational states are represented using the numeric equivalents only. |
| cageType |
Indicates the type of this cage. |
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The values that this measure can report and their corresponding numeric values are discussed in the table below:
| Numeric Value |
Measure Value |
| 0 |
Unknown |
| 2 |
DC1 |
| 3 |
DC2 |
| 4 |
DC3 |
| 5 |
DC4 |
| 6 |
DCS1 |
| 7 |
DCS2 |
| 8 |
DCN1 |
Note:
By default, this measure reports the Measure Values discussed above to indicate the type of a cage. In the graph of this measure however, detailed operational states are represented using the numeric equivalents only. |
| enclosureID |
Indicates the enclosure ID of this cage. |
Number |
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