Dell POWERVAULT MD3600F - Manual (Page 110)

110 Configuration: Disk Groups and Virtual Disks
To change the segment size of a virtual disk:
1 In the AMW, select the Logical tab and select a virtual disk.
2 Select Virtual DiskChangeSegment Size.
3 Select the required segment size.
A message prompts you to confirm the selected segment size.
4 Click Yes.
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. For more information about the Automatic Configuration Wizard,
see the PowerVault Modular Disk Storage Manager online help topics.
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.
book.book Page 110 Tuesday, June 18, 2013 3:03 PM