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This page provides details of what's new in HCD for z/OS V1R10.
Multi-user access
When creating an IODF, you can specify a multi-user access option, so that multiple users can simultaneously update this IODF. The IODF is kept in exclusive update mode only for the duration of a single transaction. If the updates of the transaction are committed, another user may update the IODF without requiring the first user to release it. Users can switch between single-user and multi-user access using a new option in the Change I/O Definition File Attributes dialog.
Changed HCD LDAP support
The HCD LDAP backend now works as a plug-in to the IBM Tivoli Directory Server for z/OS. Support of the z/OS Integrated Security Services LDAP Server has been discontinued.
CUADD value is shown on the Control Unit List
A new column CUADD is introduced on the Control Unit List to display the defined logical address for a control unit, where available.
Changes to the ‘Switch IOCDS’ request
Whenever an HCD Switch IOCDS request is performed, an informational message (CBDG323I) will be written from the HCD session to the console.
Enhanced spanning of channel paths
Up to z/OS V1R9 HCD, connected control units and devices were not defined for the new CSS when spanning a channel path to a new CSS. Users had to do this explicitly by invoking an action from the Control Unit List. Starting with this release, when spanning a channel path with connected control unit(s) (and devices) to a new CSS, HCD invokes a dialog asking whether the control units should also be reachable from the new CSS.
New profile option
There is one new keyword that you can specify in the HCD profile for the following purpose:
- Delay device regrouping: You can specify that HCD should perform any necessary device regrouping after a device group split only when the IODF is closed. This gives a better response time in the HCD dialog for large IODFs, because HCD per default performs a necessary device regrouping each time when exiting the I/O Device List.
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