114 Configuration: Disk Groups and Virtual DisksThe segment size modification operation begins. The virtual disk icon in theLogical pane shows an Operation in Progress status while the operation istaking 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 ChangeModification Priority.Changing the I/O TypeYou can specify the virtual disk I/O characteristics for the virtual disks thatyou are defining as part of the storage array configuration. The expected I/Ocharacteristics of the virtual disk is used by the system to indicate anapplicable default virtual disk segment size and dynamic cache read prefetchsetting. 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 selectingVirtual Disk Change Cache Settings. You can change the segment size later byselecting Virtual Disk Change Segment Size.The I/O characteristic types shown below are only presented during the createvirtual disk process.When you choose one of the virtual disk I/O characteristics, thecorresponding dynamic cache prefetch setting and segment size that aretypically well suited for expected I/O patterns are populated in the Dynamiccache 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 yourapplication needs:• File system (typical)• Database• Multimedia• CustomThe corresponding dynamic cache read prefetch setting and segment sizevalues that are typically well suited for the selected virtual disk I/Ocharacteristic type are populated in the Dynamic cache read prefetchfield and the Segment size field .
