HP OpenVMS 8.x manual Installing the OpenVMS Operating System onto a System Disk

—ODS-5 volumes cannot be mounted on any version of OpenVMS prior to Version 7.2.

—Systems running OpenVMS VAX Version 7.2 and higher can mount ODS-5 volumes, but cannot create or access files having extended names. (Lowercase file names are seen in uppercase on OpenVMS VAX systems.)

Select ODS-2 or ODS-5 by entering 2 or 5 at the prompt.

6.Enable Hard Links (ODS-5 Only): If you selected ODS-5, the procedure asks whether you want to enable hard links (if you selected ODS-2, skip to the next step). When you install OpenVMS I64, the procedure advises you that WBEM Services for OpenVMS does not require hard links, as shown in the following example. Enter YES or NO to indicate your choice.

Hard links can be enabled on ODS-5 disks. WBEM Services for OpenVMS does not require hard links. (? for more information)

Do you want to enable hard links? (Yes/No/?) YES

Both ODS-2 and ODS-5 support aliases, which are additional names for a file or directory. Only ODS-5 supports hard links. One of the main differences with hard links enabled is the way the DCL DELETE command works. With hard links enabled, if you enter the DELETE command to delete a file that has one or more aliases associated with it, the command only deletes the alias by which the file is being accessed. The actual file continues to exist and is accessible by any remaining alias. The file is deleted only when the last remaining alias is deleted. Without hard links enabled, the DELETE command deletes both the alias by which the file is being accessed and the file itself. Any other aliases remain but the file is no longer accessible because it is no longer present. Thus, the remaining aliases are unusable. If enabling hard links has any drawbacks, they are minor and probably of concern only in rare circumstances. For example, if disk quotas are in effect, though owners of a file can delete any links to a file in a directory they can access, hard links in other users’ directories might cause a file to be retained, and the file size continues to be charged against that owner’s disk quota.

In general, be aware that enabling hard links does change the file system’s behavior and that applications and management practices should respond accordingly (instead of being alias-specific, for example).

For more information about hard links, see the HP OpenVMS System Manager's Manual, Volume 1: Essentials.

7.Confirm Target System Disk Choices: The procedure displays your target system disk choices and asks you to confirm that they are correct. In the following example, the choices made were to initialize the disk with ODS-5 and with hard links. The volume label is I640831H1.

You have chosen to install OpenVMS I64 on a new disk.

The target system disk, DKB400:, will be initialized with structure level 5 (ODS-5).

Hard links WILL be enabled. It will be labeled I640831H1.

Any data currently on the target system disk will be lost.

Is this OK? (Yes/No) YES

Initializing and mounting target....

%EFI-I-VOLINIT, FAT volume DIAGNOSTICS has been initialized

Creating page and swap files....

8.Configure and Validate Boot Options : On OpenVMS I64 installations, the procedure next asks whether you want to create or validate boot options.

3.3 Installing the OpenVMS Operating System onto a System Disk 57