The revert_to command is specific to Data ONTAP release families; the Data ONTAP 8.2 version of revert_to can only be used to go back to 8.1 target release, not for any earlier release.
The revert_to command performs these steps:
(1) Revert the /etc/exports file to an older version.
(2) Revert inodes for each volume.
(3) Write an older version of the RAID disk labels for each disk.
(4) Removes the registry entry that enables NDMP after the node reboots. Note: After the reversion, if you want NDMP to be enabled each time a node reboots, put the ndmpd on command in the /etc/rc file.
(5) Halts the node.
All volumes and aggregates must be online; or, offline volumes and aggregates must be destroyed. Any unsaved core must be recovered or released by savecore. WAFL iron must be run on all aggregates that contain bad blocks. All disks must be online. All SnapMirror relationships must be broken. All Flash Pools and advanced_zoned checksum aggregates must be offlined or destroyed. All 4096 or 4160 bps disks must be removed. The following must be disabled: SnapMirror/SnapVault on all volumes Storage failover The following operations must not be running: Dump or restore RAID scrubs RAID optimized reconstructions RAID assimilation RAID disk sanitization WAFL iron Inode file upgrade Disk maintenance center testing Disk failure processing
revert_to 8.1
For c-mode system, after mhost revert, enter:
revert_to 8.1c