Drr processor usage statistics – HP XP Array Manager Software User Manual
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Cluster
Disk Adapter
Disk Processor How to Migrate Volumes
2
DKA-2ML
DKPC4-2ML
DKPC5-2ML
DKPC6-2ML
DKPC7-2ML
Migrate volumes from parity groups with the following
IDs to another parity group:
2-X
4-X
12-X
2
DKA-2NU
DKPD0-2NU
DKPD1-2NU
DKPD2-2NU
DKPD3-2NU
Migrate volumes from parity groups with the following
IDs to another parity group:
5-X
13-X
2
DKA-2NL
DKPD4-2NL
DKPD5-2NL
DKPD6-2NL
DKPD7-2NL
Migrate volumes from parity groups with the following
IDs to another parity group:
6-X
14-X
2
DKA-2XU
DKPE0-2XU
DKPE1-2XU
DKPE2-2XU
DKPE3-2XU
Migrate volumes from parity groups with the following
IDs to another parity group:
7-X
15-X
2
DKA-2XL
DKPE4-2XL
DKPE5-2XL
DKPE6-2XL
DKPE7-2XL
Migrate volumes from parity groups with the following
IDs to another parity group:
8-X
16-X
2
DKA-2WU
DKPF0-2WU
DKPF1-2WU
DKPF2-2WU
DKPF3-2WU
Migrate volumes from parity groups with the following
IDs to another parity group:
9-X
17-X
2
DKA-2WL
DKPF4-2WL
DKPF5-2WL
DKPF6-2WL
DKPF7-2WL
Migrate volumes from parity groups with the following
IDs to another parity group:
10-X
18-X
Note:
The letter X is a placeholder for numerical values. For example, parity group 1-X indicates parity
groups such as 1-1 and 1-2.
For details on how to view usage statistics about disk adapters and disk processors, see
Viewing Usage Statistics about Disk Processors (DKPs)
Note:
Auto LUN cannot estimate DKP usage, and may not provide any performance improvement for
cases in which DKP usage values vary only slightly, or for cases in which overall DRR usage values are
relatively high. Auto LUN is designed for use with obvious cases of high or unbalanced DKP usage.
DRR Processor Usage Statistics
A data recovery and reconstruction processor (DRR) is a microprocessor (located on the DKAs) that is
used to generate parity data for RAID-5 or RAID-6 parity groups. The DRR uses the formula "old data +
new data + old parity" to generate new parity.
If the monitor data shows high DRR usage overall, this can indicate high write penalty condition.
Please consult your HP representative about high write penalty conditions. If the monitor data shows
XP24000 Performance Monitor User's Guide
19