eG Monitoring
 

Measures reported by EqlDiskStatusTest

This test auto-discovers the disks in the storage device, and reports the size, status, errors, and the level of I/O activity on each disk. With the help of this test, you can accurately identify unhealthy disks and disks that are prone to errors. You can also use this test to determine whether I/O load is uniformly distributed across all disks, and in the process isolate irregularities in load-balancing.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
Disk_size Indicates the size of this disk. GB  
Disk_status Indicates the current state of this disk.   This measure reports the status of the disk in this array as follows:
  • Online
  • Spare
  • Failed
  • Offline
  • Alt-Sig
  • TooSmall
  • History of Failures
  • Unsupported
  • Unhealthy
  • Replacement

The numeric values that correspond to the above-mentioned states are as follows:

State Numeric Value
Online 1
Spare 2
Failed 3
Offline 4
Alt-Sig 5
TooSmall 6
History of Failures 7
Unsupported 8
Unhealthy 9
Replacement 10

Note:

By default, this measure reports the above-mentioned states while indicating the current state of this disk. However, the graph of this measure will be represented using the corresponding numeric equivalents of the states as mentioned in the table above.
Disk_errors Indicates the number of the errors that have occured in the disk during the last measurement period. Number Ideally, the value of this measure should be 0.
Bytes_read Indicates the number of bytes of data read from this disk during the last measurement period. MB These measures are good indicators of the I/O load on a disk.
Bytes_write Indicates the number of bytes of data written to this disk during the last measurement period. MB