Tls Is Not Supported In The Data Ontap 8.0 Release Family; Rlm Over Ipv6 Not Supported In The Data Ontap 8.0 Release Family; Storage Management Cautions; Disk Failures Might Increase For Some Disk Models After Upgrading To This Version Of Data Ontap - IBM N Series Manual

TLS is not supported in the Data ONTAP 8.0 release family

Transport Layer Security version 1.0 (TLSv1.0) was introduced in a previous
Data ONTAP release, but it is not a supported function in the Data ONTAP
8.0 release family.
If you enabled TLS in a previous Data ONTAP release family, it is no longer
available when you run the Data ONTAP 8.0 release family. The system uses
SSL instead of TLS for communication.

RLM over IPv6 not supported in the Data ONTAP 8.0 release family

If you upgrade from the Data ONTAP 7.3 release family and your RLM is
configured with IPv6, existing IPv6 configuration is automatically removed
during the upgrade because IPv6 is not supported in the Data ONTAP 8.0
release family.
If your RLM configuration does not include static IPv4 or DHCP IPv4, you
need to reconfigure the RLM by using the rlm setup command after
upgrading to the Data ONTAP 8.0 release family.
For information about the RLM, see the Data ONTAP 8.0 7-Mode System
Administration Guide.

Storage management cautions

You should review these issues and take appropriate action before upgrading
or reinstalling.
v "Disk failures might increase for some disk models after upgrading to this
version of Data ONTAP"
Disk failures might increase for some disk models after upgrading to this
version of Data ONTAP
Starting with Data ONTAP 8.0.4, the software install or upgrade includes new
storage expansion unit firmware versions for EXN1000 and EXN3000 storage
expansion units that provide enhanced disk error detection and prediction
capabilities. Therefore, after upgrading to this version of Data ONTAP, you
might experience an increase in the number of disk failures for certain storage
expansion units and disk models.
Increased disk failures after upgrading to this version of Data ONTAP is
expected behavior. You should follow standard best practices for spares when
you upgrade, to ensure that sufficient spares are always available.
The following table shows the storage expansion unit and disk models that
might show an increased failure rate after upgrading:
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IBM System Storage N series: Data ONTAP 8.0.4 7-Mode Release Notes