Infortrend RAID Controller Manual

The member drives belonging to the selected logical drive will be
listed. Select the member drive (the source drive) which you want to
replace with a larger one.
Select one of the member drives as the "source drive" (status indicated
as ON-LINE) by pressing [ENTER], a table of available SCSI drives
will prompt. Select a "new drive" to copy the capacity of the source
drive. The channel number and ID number of both the “Source Drive”
and “the Destination Drive” will be indicated in the confirming box.
Choose Yes to confirm and proceed.
Press [ESC] to view the progress.
Completion of the Copy and Replace process will be indicated by a
notification message. Follow the same method to copy and replace
every member drive with drives of higher capacity. You may now
perform “Expand Logical Drive” to make use of the capacity brought
by the new drives and then map the additional capacity to a Host
LUN.
Advanced Configurations 10-7