HP BA322 90087 - Manual (Page 59)

if you do not need the new features of ODS-5 disks, including the support of applications
ported from other operating systems (such as UNIX, Linux, and MS Windows).
• ODS-5
— ODS-5 supports file names that are longer, have a wider range of legal characters,
and allow for mixed-case file names. This feature permits use of file names similar
to those in a Microsoft Windows or UNIX environment.
— ODS-5 supports hard links to files, access dates, and files whose names differ only
by case.
— 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 select 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 Integrity servers, 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 I64084.
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 I64084.
Any data currently on the target system disk will be lost.
3.4 Installing the OpenVMS Operating System on to a System Disk 59