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Requirements for nondisruptive upgrades on systems with deduplicated volumes

You can perform major and minor nondisruptive upgrades when deduplication is enabled, provided that no more than 500 FlexVol volumes have deduplication enabled and that no deduplication operations are running during the Data ONTAP upgrade.

The total number of deduplicated and non-deduplicated FlexVol volumes must not exceed the total number of FlexVol volumes supported for nondisruptive upgrades on your system.

Nondisruptive upgrades should be done when deduplication operations are not active. To ensure that no deduplication operations are active, you must take both of the following actions:
You can use the sis status command to determine the status of deduplication operation on a volume. The output of the sis status command is similar to the following:
 Path              State      Status     Progress
/vol/v457         Enabled    Idle       Idle for 00:12:30
/vol/v458         Enabled    Idle       Idle for 00:12:30
/vol/v459         Enabled    Idle       Idle for 00:12:30
/vol/v460         Enabled    Idle       Idle for 00:12:30
/vol/v461         Enabled    Active     521 MB Scanned
/vol/v462         Enabled    Active     489 MB Scanned
/vol/v463         Enabled    Active     387 MB Scanned
/vol/v464         Enabled    Idle       Idle for 00:12:30
You can use the sis stop command to abort the active SIS operation on the volume and the sis start command to restart it.
Note: If you started the deduplication operation initially using the sis start -s command, then you can use the checkpoint when restarting the deduplication operation.

For information about deduplication, see the Data ONTAP 7-Mode Storage Management Guide and the sis(1) man page.