IBM N Series User Manual

Widelinks are not accessible from Mac clients
When a user attempts to connect to a share using widelinks from a Mac OS X
client, the attempt fails. Widelinks are not accessible from Mac OS X clients.
Empty CIFS/SMB2.x change notifications
CIFS/SMB2.x clients connected to the storage system might request to be
notified about changes to a particular directory. In certain situations, the
notifications that Data ONTAP returns are empty.
Data ONTAP collects all notifications that occur within 500 milliseconds after
an event is generated to avoid subsequent change notify requests for every
single such event. If the maximum capacity of the buffer that is allocated to
hold these notifications is reached, Data ONTAP responds with an empty
notification.
To work around this issue, you can decrease the time period for accumulating
events. Decreasing the time period reduces the chance of maxing out the
buffer and receiving empty change notifications.
To decrease the time period, enter the following command:
setflag smb_boxcar_expire_ms time
time is the length of the time period in milliseconds.
By reducing this time period, Data ONTAP returns change notification
responses quicker and with fewer events per response. While this might not
completely eliminate empty notifications, a properly reduced time period
reduces them significantly.
Due to the reduced number of events returned with each change notification
response, clients have to send more change notify requests to obtain all
events.
Known problems and limitations 103

IBM N Series Specifications

General

Brand	IBM
Model	N Series
Category	Storage
Language	English

Summary

Changes Introduced Since Data ONTAP 8.0

New Known Issues and Limitations in Data ONTAP 8.0.4 7-Mode

New and Changed Features

New and Changed Platform and Hardware Support

High-Availability Pair (Formerly Active/Active Configuration) Enhancements

Requirements for Running Data ONTAP 8.0 7-Mode

Firmware

Important Cautions

Unsupported Features

Lists features not supported in Data ONTAP 8.0 7-Mode, advising against upgrades if used.

Upgrade and Revert Cautions

Covers critical issues to review before upgrading or reverting Data ONTAP releases.

Block Access Protocol Cautions

Addresses potential issues with block access protocols like iSCSI and FC.

Data Protection Cautions

Highlights considerations for data protection technologies like SnapValidator and SnapLock.

Manageability Cautions

Details manageability issues, including certificate signing and remote booting.

Storage Management Cautions

Warns about potential disk failures and other storage management considerations after upgrading.

Network Protocol Cautions

Covers cautions related to network protocols, including system panics and interface configurations.

File Access and Protocols Cautions

Addresses cautions concerning file access protocols like CIFS, NFS, and FTP.

Known Problems and Limitations

Manageability Issues

Describes issues affecting system management, like Flash Cache data clearing and command input capture.

Storage Resource Management Issues

Covers issues related to LUN writes, user mapping, ACP port changes, and disk identification.

High-Availability Pair Issues

Details problems related to HA pairs, including controller reboots and takeover configurations.

Network Protocol Issues

Addresses issues with network protocols, such as partner node unavailability and routing configuration limits.

File Access Protocol Issues

Block Access Protocol Issues

Data Protection Issues