HP OpenVMS 8.x manual ODS-5

4.Specify the Volume Label: If you select a device that can be used, the procedure then informs you of the volume label currently assigned to this device and asks whether you want to keep that label. If you choose not to keep that label, you are prompted for a new label, as shown in the following example. The OpenVMS operating system uses the volume label to identify and reference the disk. Make sure the label you use is unique; problems occur if the same label is used by different disk volumes.

DKB400: is now labeled V82_nnn.

Do you want to keep this label? (Yes/No) [Yes] NO

Enter volume label for target system disk: [I64SYS] I640831

You can keep the label already assigned to the disk, accept the default label assigned by the system (for I64 systems, I64SYS), or specify a different volume label (with a limit of 12 characters that can include A to Z, 0 through 9, the dollar sign ($), hyphen (-), and underscore (_) characters).

NOTE: OpenVMS requires that the volume labels for all disks on your system or OpenVMS Cluster have unique labels. If a disk having the same label as the system disk is mounted, various OpenVMS components do not function as intended or a node might crash during boot.

5.Specify On-Disk Structure Level: After you enter the volume label for the target system disk, when you selected INITIALIZE, you are asked whether you want to initialize the target system disk with On-Disk Structure Level 2 (ODS-2) or Level 5 (ODS-5).

The target system disk can be initialized with On-Disk Structure

Level 2 (ODS-2) or Level 5 (ODS-5). (? for more information)

OpenVMS I64 systems include WBEM Services for OpenVMS; the WBEM data repository requires an ODS-5 disk. If you choose to initialize the target system disk with ODS-5 the repository can be on the system disk; otherwise you will need to provide an additional ODS-5 disk. (? for more information.

Do you want to initialize with ODS-2 or ODS-5? (2/5/?)

For details about ODS-2 and ODS-5 file systems, see the HP OpenVMS System Manager's Manual, Volume 1: Essentials. A brief summary follows.

NOTE: HP recommends that your system disk be initialized in ODS-5 format, unless you plan to use software that requires ODS-2.

Note also that although WBEM Services for OpenVMS can be installed on an ODS-2 disk, the WBEM Services for OpenVMS data repository requires an ODS-5 disk. A system disk in ODS-5 format can store everything; if you choose to have your disk in ODS-2 format, the procedure asks you to provide an ODS-5 disk for the data repository.

•ODS-2

ODS-2 allows for compatibility with OpenVMS VAX and Alpha systems that use ODS-2 disks (as well as OpenVMS I64 systems using ODS-2 disks). Choose ODS-2 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.

56 Installing the OpenVMS Operating System