116 Configuration: Disk Groups and Virtual Disks
The segment size modification operation begins. The virtual disk icon in the
Logical pane shows an Operation in Progress status while the operation is
taking place.
NOTE: To view the progress or change the priority of the modification operation,
select a virtual disk in the disk group, and select Virtual Disk Change
Modification Priority.
Changing the I/O Type
You can specify the virtual disk I/O characteristics for the virtual disks that
you are defining as part of the storage array configuration. The expected I/O
characteristics of the virtual disk is used by the system to indicate an
applicable default virtual disk segment size and dynamic cache read prefetch
setting. Refer to the PowerVault Modular Disk Storage Manager online help
topics for information on the Automatic Configuration Wizard.
NOTE: The dynamic cache read prefetch setting can be changed later by selecting
Virtual Disk Change Cache Settings. You can change the segment size later by
selecting Virtual Disk Change Segment Size.
The I/O characteristic types shown below are only presented during the create
virtual disk process.
When you choose one of the virtual disk I/O characteristics, the
corresponding dynamic cache prefetch setting and segment size that are
typically well suited for expected I/O patterns are populated in the Dynamic
cache read prefetch field and the Segment size field.
To change the I/O type:
1
Select from these virtual disk I/O characteristic types, based on your
application needs:
•
File system (typical)
•
Database
•
Multimedia
•
Custom
book.book Page 116 Thursday, December 9, 2010 3:20 PM