Fixing A Parity Group; Changing Disk Usage Rate Limit For An Hdd Class; Viewing The Migration History Logs - HP XP P9500 User Manual

7. In the "Parity Group list" (page
as a target volume candidate, and then select Reserved LDEV from the pop-up menu.
8. Click Apply to reserve the volume.
An icon should appear adjacent to the volume.
To change a reserved volume to a normal volume, right-click a reserved volume icon
select Normal LDEV from the pop-up menu.

Fixing a parity group

If you specify a parity group as fixed, the parity group will not experience degraded I/O speeds
as auto migration will not be possible to or from this parity group.
NOTE: A volume in a fixed parity group can be selected as a target or source volume for a
manual migration plan.
Procedure 8 To fix a parity group
1. Click Actions Other Function Auto LUN to open the Auto LUN window.
2. Click
3. In the Auto LUN window, click Auto LUN. A different window appears.
4. Click the Attribute tab to display the
5. In the navigation tree, double-click an HDD class folder to view parity groups.
6. Fixed parity groups are indicated with a
that you want to exclude from auto migration operations.
7. Right-click the parity group and select Fixed PG from the pop-up menu.
8. Click Apply.
To "un-fix" a fixed parity group, right-click the fixed parity group and then select Normal PG from
the pop-up menu.

Changing disk usage rate limit for an HDD class

By default, the Max. disk utilization auto migration parameter value is applied to each HDD class.
If necessary, you can change the disk usage rate limit for an HDD class.
Procedure 9 To change the disk usage rate limit for an HDD class:
1. Click Actions Other Function Auto LUN to open the Auto LUN window.
2. Click
3. In the Auto LUN window, click Auto LUN. A different window appears.
4. Click the Attribute tab to display the
5. In the navigation tree, right-click an HDD class folder and then select Change Class Threshold
from the pop-up menu.
The Change Threshold window appears.
6. From the Threshold list, select the value for the disk usage rate limit and then click OK. In the
navigation tree, the threshold value appears to the right of the HDD class.
7. Click Apply to apply the specified limit to the storage system.

Viewing the migration history logs

The History window displays logs of auto migration operations and manual migration operations.
Procedure 10 To view migration logs:
1. Click Actions Other Function Auto LUN to open the Auto LUN window.
57), right-click a volume with the
to change to Modify mode.
to change to Modify mode.
"Attribute window" (page
icon, so select a parity group without this icon
"Attribute window" (page
icon to reserve that volume
and then
55).
55).
Fixing a parity group 27