Iscsi Traffic Not Supported On E0M And E0P Interfaces; New Flexvol Volume Space Requirements When Upgrading From A Release Earlier Than Data Ontap 7.3; Determining System Capacity And Space Guarantees Before Upgrading To Data Ontap 7.3 Or Later - IBM N Series Manual

.zip or .tgz image available from an HTTP server in your environment, then
use the software update command to copy the upgrade image from the HTTP
server, extract and install the system files, and download the files to the boot
device with one command.
For more information about upgrade images, see the Data ONTAP 8.0 7-Mode
Upgrade and Revert/Downgrade Guide.

iSCSI traffic not supported on e0M and e0P interfaces

If you are running iSCSI traffic and you are upgrading from Data ONTAP
version 7.3 or earlier to version 8.0, you will no longer be able to run iSCSI
traffic on the e0M and e0P interfaces.
In addition, if you revert from Data ONTAP version 8.0, the e0M and e0P
interfaces remains disabled for iSCSI traffic by default, as follows:
v Target portal group configuration related to e0M and e0P may change.
v e0M and e0P may be removed from the iSCSI access list configuration.
New FlexVol volume space requirements when upgrading from a release
earlier than Data ONTAP 7.3
Upgrading to Data ONTAP 8.0 or later from a release earlier than Data
ONTAP 7.3 will cause existing FlexVol volumes to require more free space
from their containing aggregate.
Data ONTAP 7.3 includes an improvement to free space accounting. As a
result, existing FlexVol volumes reserve additional space, resulting in a loss of
0.5% of free space.
Attention: You must ensure that all systems upgrading to Data ONTAP 7.3
or later have at most 96 percent used space in their aggregates. If there is
insufficient free space in an aggregate to satisfy the increased requirement
from its FlexVol volumes, the space guarantee for one or more volumes in that
aggregate could be disabled.
For more information, see the Data ONTAP 8.0 7-Mode Upgrade and
Revert/Downgrade Guide.
Determining system capacity and space guarantees before upgrading to
Data ONTAP 7.3 or later
If you suspect that your system has almost used all of its free space, or if you
use thin provisioning, you should check the amount of space in use by each
aggregate. If any aggregate is 97 percent full or more, do not proceed with the
upgrade until you have used aggrSpaceCheck tools to determine your system
capacity and plan your upgrade.
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IBM System Storage N series: Data ONTAP 8.0.4 7-Mode Release Notes