Modify Disk Performance Monitor
Overview
This function monitors the disk performance. If a potential performance error is detected in a disk, this function notifies the event and isolates the disk. By isolating a disk which has a performance error at an early stage, performance degradation of the entire storage system can be prevented.
This function enables/disables performance monitoring and configures monitoring parameters, etc. The target disks that can be monitored using this function are Online disks, Nearline disks, Online SEDs, and Nearline SEDs.
The status of the monitoring target disks are as follows:
Data disks that configure a normal RAID group
Hot spare disks that are registered in a RAID group
SSDs and SSD SEDs cannot be monitored.
RAID groups that are registered as REC Disk Buffers cannot be monitored.
The monitoring setting parameters specified using this function remain even when the monitoring function has been changed from "Enable" to "Disable".
User Privileges
Availability of Executions in the Default Role
| Default role | Availability of executions |
|---|---|
| Monitor | |
| Admin | |
| StorageAdmin | |
| AccountAdmin | |
| SecurityAdmin | |
| Maintainer |
Refer to "User Roles and Policies" for details on the policies and roles.
Settings
Monitor Setting
| Item | Description | Setting values |
|---|---|---|
Monitoring |
Select whether to "Enable" or "Disable" the disk performance monitoring function. |
Enable Disable (Default) |
Disk Performance Setting
| Item | Description | Setting values |
|---|---|---|
Event notification |
Select "Enable" to notify when a disk with a performance error is detected. Select "Disable" if no notification is necessary. If "Enable" is selected, the storage system notifies when a disk with a performance error is detected as an event according to the "Disk Warning" notification setting. Refer to the [Setup Event Notification] function for details. |
Enable Disable (Default) |
Disk isolation |
If a disk with a performance error has been detected, select "ON" to isolate the disk, and "OFF" not to isolate the disk. The disk with the performance error requires preventive maintenance, and redundant copy is performed. |
ON OFF (Default) |
Error monitoring factor |
Select the error monitoring factor. "Error monitoring factor" is a standard value for detecting a disk with a performance error. The disk with a performance error is assessed with "Error monitoring factor", "Threshold of allowable error", and "Monitoring interval". If the occurrence ratio (%) of the Non-medium Error in the host I/O during the "Monitoring interval" exceeds the "Error monitoring factor", the disk becomes a candidate as a disk with a performance error. |
0.1 - 10.0 (interval: 0.1) 0.5 (Default) |
Threshold of allowable error |
Select the allowed error threshold. "Threshold of allowable error" is a standard value for detecting a disk with a performance error. The disk with a performance error is assessed with "Error monitoring factor", "Threshold of allowable error", and "Monitoring interval". If the occurrence ratio (%) of the Non-medium Error in the candidate disks during the "Monitoring interval" exceeds the "Threshold of allowable error", the disk is regarded as having a performance error. |
7.2 - 720.0 (interval: 7.2) 72.0 (Default) |
Monitoring interval |
Select the interval (collecting time) to perform disk performance monitoring. |
1 - 24 hours (interval: 1 hour) 1 hour (Default) |
Operating Procedures
Click [Setup Disk Performance] in [Action].
Select the parameters, and click the [Set] button.
→ A confirmation screen appears.
Click the [OK] button.
→ The disk performance monitoring setting starts.
Click the [Done] button. Returns to the [System Settings] screen.