Rolling back ONTAP LUNs to 7-Mode LUNs on RHEL hosts
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If your ONTAP LUNs are not performing as you expect after transition from Data ONTAP operating in 7-Mode, you can rollback from ONTAP to 7-Mode LUNs on a Red Hat Enterprise Linux (RHEL) 5 or RHEL 6 host.
Your 7-Mode LUNs must be mapped back to your RHEL 5 or RHEL 6 host.
Discover the 7-Mode LUNs:
Configure your DMMP devices for 7-Mode LUNs:
Verify your 7-Mode LUNs:
sanlun lun show
Determine the 7-Mode LUN device handle ID:
multipath -ll device_handle_name
If the host was configured with Logical Volume Manager (LVM), do the following:
Import the volume group:
Verify the volume group status:
Enable logical volumes:
vgchange -ay vg_name
Verify logical volume status:
The LV Status should be displayed as available.
Mount the logical volumes from the ONTAP LUN to its respective mount point directory:
mount lv_name mount_point
If the mount points are defined in the
etc/fstabfile, you can also use the
mount -acommand to mount the logical volumes.
Verify the mount points: