Deactivating a disk drive using Linux

Concurrent maintenance can be accomplished on disk drives without removing power to either the enclosure or the server. Use the following procedure in conjunction with the removal and replacement procedures to concurrently remove or replace a disk drive using Linux®.

1. 
   
2. Log in as root user.
3. Type iprconfig on the command line of the Linux session and press Enter.

   The IBM® Power RAID Configuration Utility opens.

4. Select Analyze log and press Enter. The Kernel Messages Log display is shown.
5. Select View most recent ipr error messages from the Kernel Messages Log display. Press Enter.
6. Find the entry in the log for the disk drive you want to deactivate.
7. Record the location information for the disk drive.
   Note: The location information has the form of 2:0:8:0. In this example, 2 is the SCSI host number, 0 is the SCSI bus, 8 is the SCSI target ID, and 0 is the LUN (logical unit).
8. Return to the command line.
9. Type the following code phrase:

   ls -ld /sys/class/scsi_host/host#/device

   where # is the SCSI host number. Press Enter.

10. Record the PCI location information.
    Note: The PCI location information has the form of 61:01:0:2.
11. Type iprconfig on the command line and press Enter.

    The IBM Power RAID Configuration Utility display opens.

12. Select Display hardware status from the IBM Power RAID Configuration Utility display. Press Enter.

    The Display Hardware Status display is shown.

13. Look for the disk drive at the PCI location you recorded. The disk drive might have a Failed status.
14. If the disk drive you want to deactivate is unprotected or in use, move the data from the disk drive before continuing with this procedure.

    For information, see the PCI-X SCSI RAID Controller Reference Guide for Linux.

15. Type option 1 (Display hardware resource information details) next to the disk drive you want to deactivate. Press Enter.

    Disk Hardware Resource Information Details display.

16. Record the physical location information.
17. Return to the IBM Power RAID Configuration Utility display.
18. From the IBM Power RAID Configuration Utility display, select Work with disk unit recovery. Press Enter.
19. From the Work with Disk Unit Recovery display, select Concurrent remove device. Press Enter. A Concurrent Device Remove display is shown.
20. Select option 1 next to the location for the disk drive you want to deactivate. Press Enter.
21. The Verify Device Concurrent Remove display is shown. The concurrent maintenance light turns on for that disk drive slot.
22. On the Verify Device Concurrent Remove display, verify that the selected disk drive is the disk drive you want to deactivate, then press Enter. The identify light turns on for the disk drive.
    Attention: Ensure that the disk drive is not in use to prevent loss of data.

    The Complete Device Concurrent Remove display is shown.

    Attention:

    • Attach a wrist strap to an unpainted metal surface of your hardware to prevent electrostatic discharge (ESD) from damaging your hardware.
    • When using a wrist strap, follow all electrical safety procedures. A wrist strap is for static control. It does not increase or decrease your risk of receiving electric shock when using or working on electrical equipment.
    • If you do not have a wrist strap, just prior to removing the product from ESD packaging and installing or replacing hardware, touch an unpainted metal surface of the system for a minimum of 5 seconds.
23. Press Enter on the IBM Power RAID Configuration Utility to indicate that you have deactivated the disk drive.
24. If you are removing a disk drive from your system, go back to Disk drive and complete the disk drive hardware removal portion of this procedure.