Dell PowerVault MD 32XX/36XX Series Storage Arrays CLI Guide

When creating a new virtual disk, define the segment size for that virtual disk. You can later change the segment size to optimize performance. In a multi-user database or file system storage environment, set your segment size to minimize the number of physical disks needed to satisfy an I/O request. Use larger values for the segment size. Using a single physical disk for a single request leaves other disks available to simultaneously service other requests. If the virtual disk is in a single-user large I/O environment, performance is maximized when a single I/O request is serviced with a single data stripe; use smaller values for the segment size. To change the segment size, run the following command:

set virtualDisk ([virtualDiskName] | <
                                 wwid>)
                                 segmentSize=
                                 segmentSizeValue
                              

where, segmentSizeValue is the new segment size you want to set. Valid segment size values are 8, 16, 32, 64, 128, 256, and 512. You can identify the virtual disk by name or World Wide Identifier (WWID) (see Set Virtual Disk).