v NFS Heartbeat parameters on the ESX Server
v Timeout values for SCSI disks on guest operating systems
It is also highly recommended that the file systems using virtual machine disk
format (VMDK) on Windows be correctly aligned with the storage systems'
WAFL file system.
For more information about verifying and updating these configurations, see
the Data ONTAP 8.0 7-Mode Upgrade and Revert/Downgrade Guide.
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 300 FlexVol volumes (or
200 FlexVol volumes on N3400 storage systems) have deduplication enabled,
and that no deduplication operations are running during the Data ONTAP
upgrade.
For information about deduplication, see the Data ONTAP 8.0 7-Mode Storage
Management Guide and the sis(1) man page.
New reversion and downgrade procedures
If you need to transition to an earlier Data ONTAP release, be sure to check
the new procedures in the Data ONTAP 8.0 7-Mode Upgrade and
Revert/Downgrade Guide to help determine the correct action in your
environment.
72 IBM System Storage N series: Data ONTAP 8.0.4 7-Mode Release Notes
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