eG Monitoring
 

Measures reported by VnxDAETest

The disk array enclosure (DAE) is a disk-array storage system that uses a Fiber Channel Arbitrated Loop (FC-AL) as its interconnect interface. Besides multiple disk drives, a DAE contains disk array controllers, a cache, power supplies, fans, and link controller cards (LCC). Since a DAE seeks to provide increased availability, resilience, and maintainability, it uses additional redundant controllers, power supplies, fans, and LCCs, often up to a point when all single points of failure (SPOFs) are eliminated from the design. Additionally, these components are often hot-swappable.

At any given point in time, administrators may want to know which of these redundant components are available and which are down, so that they can instantly detect a hot-swap. Moreover, such status updates also enable administrators to quickly capture situations where all the redundant components are unavailable, so that they can rapidly resolve the issues to ensure high availability of the storage system. The VnxDAETest test helps administrators achieve this. This test auto-discovers the DAEs on EMC VNX and reports the current status of the fans, power supply units, and LCCs in every DAE, so that administrators are promptly intimated of the failure of one/more of these redundant components.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
Fan_A_state Indicates the current state of fan A in this DAE.   If fan A is unavailable, then this measure will return the value N/A. On the other hand, if fan A is available, then the value of this measure will be Present.

The numeric values that correspond to each of the states discussed above are as follows:

Value State
1 Present
2 N/A

Note:

By default, this measure reports the values Present or N/A to indicate the status of fan A. The graph of this measure however, represents the status of fan A using the numeric equivalents - 1 or 2.
Fan_B_state Indicates the current state of fan B in this DAE.   If fan B is unavailable, then this measure will return the value N/A. On the other hand, if fan B is available, then the value of this measure will be Present.

The numeric values that correspond to each of the states discussed above are as follows:

Value State
1 Present
2 N/A

Note:

By default, this measure reports the values Present or N/A to indicate the status of fan B. The graph of this measure however, represents the status of fan B using the numeric equivalents - 1 or 2.
Power_A_state Indicates the current state of the power supply unit A in this DAE.   If power unit A is unavailable, then this measure will return the value N/A. On the other hand, if power unit A is available, then the value of this measure will be Present.

The numeric values that correspond to each of the states discussed above are as follows:

Value State
1 Present
2 N/A

Note:

By default, this measure reports the values Present or N/A to indicate the status of power supply unit A. The graph of this measure however, represents the status of unit A using the numeric equivalents - 1 or 2.
Power_B_state Indicates the current state of the power supply unit B in this DAE.   If power unit B is unavailable, then this measure will return the value N/A. On the other hand, if power unit B is available, then the value of this measure will be Present.

The numeric values that correspond to each of the states discussed above are as follows:

Value State
1 Present
2 N/A

Note:

By default, this measure reports the values Present or Not Present to indicate the status of power supply unit B. The graph of this measure however, represents the status of unit B using the numeric equivalents - 1 or 2.
LCC_A_state Indicates the current state of the LCC A.   If LCC A is unavailable, then this measure will return the value N/A. On the other hand, if LCC A is available, then the value of this measure will be Present.

The numeric values that correspond to each of the states discussed above are as follows:

Value State
1 Present
2 N/A

Note:

By default, this measure reports the values Present or N/A to indicate the status of LCC A. The graph of this measure however, represents the status of LCC A using the numeric equivalents - 1 or 2.
LCC_B_state Indicates the current state of the LCC B.   If LCC B is unavailable, then this measure will return the value N/A. On the other hand, if LCC B is available, then the value of this measure will be Present.

The numeric values that correspond to each of the states discussed above are as follows:

Value State
1 Present
2 N/A

Note:

By default, this measure reports the values Present or N/A to indicate the status of LCC B. The graph of this measure however, represents the status of LCC B using the numeric equivalents - 1 or 2.