1. Oracle Hardware Management Pack 2.4 Server CLI Tools User's Guide
  2. Using raidconfig to Configure RAID
  3. Modifying a RAID Volume or Controller
  4. Enable or Disable JBOD Mode

Enable or Disable JBOD Mode

Some SAS3 Host Bus Adapters (HBA) with hardware RAID support include an option to enable JBOD mode. JBOD mode allows the operating system to access a disk directly without first creating a RAID volume on it. If JBOD mode is not enabled, the operating system is not able to see the disk until the disk is included in a RAID volume.

If supported by your HBA, you can enable JBOD mode on either a disk or controller. If you enable JBOD mode on the controller, all the disks on that controller will be in JBOD mode. Disk JBOD mode cannot be enabled until its controller has JBOD mode enabled. Check your HBA documentation to see if it supports JBOD mode.

Note:

Do not disable JBOD mode on a controller if one of its disks in JBOD mode has the OS installed on it. Also, do not disable JBOD mode on an individual disk if that disk that has the OS installed on it.

  1. To enable or disable JBOD mode on a controller, type:

    # raidconfig modify controller -c controller --jbod enabled|disabled

    When you enable JBOD mode on the controller, all the disks on that controller will be in JBOD mode. Disks can then have JBOD mode enabled or disabled individually. If you disable JBOD mode on a controller, any disks in JBOD mode will have JBOD mode disabled.

  2. To enable or disable JBOD mode on a disk, type:

    # raidconfig modify disk -d disk --jbod enabled|disabled

    The following example shows output for JBOD mode enabled on c0, then disabled on just disk 7.

    CONTROLLER c0
=============
Manufacturer   Model                    F/W Version    RAID Volumes   Disks
---------------------------------------------------------------------------
LSI Logic      MegaRAID 9361-8i         4.220.20-3050  1              8

RAID Volumes
============
ID     Name            Device            Status    Num Disks   Level   Size (GiB)
---------------------------------------------------------------------------------
c0r1   OEL             /dev/sda          OK        1           0       465

DISKS In Use
============
ID      Chassis   Slot   RAID ID   Status    Type   Media   Spare      Size (GiB)
---------------------------------------------------------------------------------
c0d0    0         0      c0r1      OK        sata   HDD     -          465

DISKS Available
===============
ID      Chassis   Slot   RAID ID   Status    Type   Media   Spare      Size (GiB)
---------------------------------------------------------------------------------
c0d1    0         1      -         JBOD      sas    HDD     -          137
c0d2    0         2      -         JBOD      sas    HDD     -          137
c0d3    0         3      -         JBOD      sas    HDD     -          137
c0d4    0         4      -         JBOD      sas    HDD     -          137
c0d5    0         5      -         JBOD      sas    HDD     -          137
c0d6    0         6      -         JBOD      sata   HDD     -          466
c0d7    0         7      -         OK        sata   HDD     -          466

Parent topic: Modifying a RAID Volume or Controller