Block access protocol issues
If your storage systems are part of a SAN environment, you might need to
familiarize yourself with block access protocol issues in this release.
For more information about these issues, see the IBM System Storage N series
Data ONTAP 8.0 7-Mode Block Access Management Guide for iSCSI and FC.
v “vStorage priority setting is not persistent after a reboot”
v “Disks offline in Windows 2008 after a standard upgrade”
v “iSCSI Target HBA support”
v “If an iSCSI target HBA fails” on page 105
v “If you use the automatic sizing feature on thinly provisioned LUNs when
snap reserve is set to a non-zero value” on page 105
vStorage priority setting is not persistent after a reboot
When you reboot your vStorage, the vstorage priority setting might change.
To verify the setting, run the following command in advanced mode: vstorage
show.
If you need to change the vstorage priority setting use the following
command: vstorage set_priority [LOWER|EQUAL|AUTO ].
Disks offline in Windows 2008 after a standard upgrade
During a standard upgrade to Data ONTAP 7.3.3 and later releases, LUNs are
assigned new revision numbers. Windows Server 2008 software interprets the
LUNs with new revision numbers as new disks and sets them offline; this
status is shown in Windows 2008 management interfaces after the upgrade.
Windows Server 2003 ignores the LUN revision number.
You can work around this problem using the nondisruptive upgrade method,
which allows the LUNs to maintain their revision numbers. You can also
bring the disks online after the upgrade using Windows disk management
tools or SnapDrive functionality.
iSCSI Target HBA support
Some storage systems support the use of an iSCSI target HBA, which contains
special network interfaces that offload part of the iSCSI protocol processing.
You cannot combine these iSCSI hardware-accelerated interfaces with standard
iSCSI storage system interfaces in the same target portal group.
If you attempt to combine these interfaces, an error message is displayed.
104 IBM System Storage N series: Data ONTAP 8.0.4 7-Mode Release Notes
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