Install a disk drive with the Linux system or logical partition powered on

You might need to install a Small Computer System Interface (SCSI) disk drive in a system or expansion unit while the Linux® operating system or logical partition that controls the disk drive location is powered on. Use the procedure in this section to perform this task.

1. Perform prerequisite tasks as described in Before you begin.
2. Remove the system unit door, expansion unit door, or the rack door. For instructions, select the appropriate procedure from the following list:
   • Remove the door from the model 285, 52x, 55x, or OpenPower 720
   • Expansion unit cover or door
3. Remove the front cover. For instructions on removing the cover, select the appropriate procedure from the following list:
   • Remove the front cover from the model 285, 52x, 55x, OpenPower 720, or the 0595 expansion unit
   • Remove the front cover from the model 51x or 710
   • Remove the front cover from the model 9116-561 or 570
   • Remove the front cover from the 7311-D20 expansion unit
   • If you have a front cover from any other models, remove the front cover.
4. Look at the front of the system or expansion unit and determine the next available disk drive position. For information, see Disk drive locations.
   Note: When you have a system with an expansion unit, fill the slot positions in the system unit first. However, you can choose a different disk drive placement depending on your data protection strategy.
5. Record the position where the new disk drive will be installed. For example, the next available disk drive position might be P3-D4.