|
Measures reported by HitachiDriveTest
To periodically verify whether the I/O load is balanced across all drives on a storage device, and to promptly detect problems with load balancing, use the HitachiDrive test.
This test is used to periodically verify whether the I/O load is balanced across all drives on a storage device, and promptly detects problems (if any) with load balancing.
The measures
made by this test are as
follows:
| Measurement |
Description |
Measurement
Unit |
Interpretation |
| IO_Rate |
Indicates the number of I/O operations performed on this drive per second.
|
IOPS |
If this measure reports a high value or if the value of the measure increases consistently, it is indicative of unusually high I/O activity on this drive. Comparing the value of this measure across drives can accurately indicate which drive is currently experiencing heavy workloads. Observing the variations in this measure over a period of time will enable you to figure out bottlenecks in load balancing.
|
| Read_Rate |
Indicates the number of read operations performed on this drive per second.
|
IOPS |
|
| Write_Rate |
Indicates the number of write commands issued on this drive per second.
|
IOPS |
|
| Trans_Rate |
Indicates the transfer size of read/write commands per second.
|
KB/sec |
|
| Read_Trans_Rate |
Indicates the transfer size of read commands per second.
|
KB/sec |
|
| Write_Trans_Rate |
Indicates the transfer size of write commands per second.
|
KB/sec |
|
| OnlineVerify_CmdCount |
Indicates the number of online verify commands executed on this drive per second.
|
Number/sec |
|
|