same capacity as the smallest drive in the array. The excess capacity of any larger drives
is wasted because it is unavailable for data storage.
•
The probability that an array will experience a drive failure increases with the number of
physical drives in the array. If you configure a logical drive with RAID 5, keep the probability
of failure low by using no more than 14 physical drives in the array.
For conceptual information about arrays, logical drives, and fault-tolerance methods, and for
information about default array configuration settings, see the HPE Array Configuration Utility
User Guide at I/O Cards and Networking Software on the Hewlett Packard Enterprise website
at
http://www.hpe.com/info/integrity-iocards-docs
Click the link for your HP-UX version. Support guides are listed alphabetically in the “User guide”
section.
Comparing the Utilities
lists the supported features and procedures for the
ACU
and
ORCA
utilities.
NOTE:
Yes in the appropriate column indicates that the feature or procedure is supported,
while No indicates that the feature or procedure is not supported.
Table 36 ACU and ORCA Supported Features and Procedures
ORCA
ACU
Supported Features
No
Yes
Uses a graphical interface
No
Yes
Available in languages other than English
No
Yes
Available on CE
No
Yes
Uses a wizard to suggest the optimum configuration for an unconfigured controller
No
Yes
Describes configuration errors
No
Yes
Suitable for configuration while online
Yes
No
Suitable for configuration while offline
Supported Procedures
Yes
Yes
Creation and deletion of arrays and logical drives
Yes
Yes
Assignment of RAID level
No
Yes
Sharing of spare drives among several arrays
No
Yes
Assignment of multiple spare drives per array
No
Yes
Setting of stripe size
No
Yes
Migration of RAID level or stripe size
No
Yes
Configuration of controller settings
No
Yes
Expansion of an array
No
Yes
Creation of multiple logical drives per array
ORCA Utility
To use
ORCA
, follow these steps:
110
Installing the System