Compaq External RAID Controller & Subsystem Infortrend Operation Manual page 264

Press [ENTER] to select a logical drive and choose "add SCSI
drives" from the submenu. Proceed with confirming the selection.
Available drives will be listed. Select one or more drive(s) to add to
the target logical drive by pressing [ENTER]. The selected drive
will be indicated by an asterisk " * " mark.
Press [ESC] to proceed and the notification will prompt.
Press [ESC] again to cancel the notification prompt, a status bar will
indicate the percentage of progress.
Array Expansion
12-5