Executor: Superuser

It is recommended that the name of a HiRDB file system area be a name linked symbolically by the OS's ln command to the entity name of the character special file or regular file, rather than using the entity name itself. This simplifies the following operations:

• Recovery of the HiRDB file system area onto a different hard disk in the event of a hard disk error
• Modification of RDAREA structure

For information on the ln command, refer to the OS manual..

Executor: Superuser

The owner and access privileges for the HiRDB file system area should be changed so that the file system area can be protected from access by unauthorized users.

Table 10-2 lists the owners and access privileges to be specified for a HiRDB file system area.

Table 10-2 Owners and access privileges to be set for HiRDB file system area

Owner or access privileges		Information to be set	Command to be executed*
Owner	User ID	HiRDB administrator	chown command
	Group ID	HiRDB group	chgrp command
Access privileges	Owner	rw (both read and write permitted)	chmod command
	Group	rw (both read and write permitted)
	Other	(access not permitted)

* These are OS commands; see the OS manual.

Executor: HiRDB administrator

The pdfmkfs command is used to initialize the character special file or regular file so that it can be used as a HiRDB file system area. For details on HiRDB file system area design guidelines, see the manual HiRDB Version 8 Installation and Design Guide.

Following is an example of executing the pdfmkfs command:

Example

pdfmkfs -n 25 -l 5 -k DB -e 5 /svr01DB001

Explanation

-n: Specifies in megabytes the size of the HiRDB file system area.

This size must not exceed the size of the partition; if it is larger than the partition size, the subsequent physical partition may be damaged.

-l: Specifies the maximum number of HiRDB files that can be created in the HiRDB file system area.

-k: Specifies the usage of the HiRDB file system area:

DB: HiRDB file system area for RDAREAs

SYS: HiRDB file system area for system files

WORK: HiRDB file system area for work table files

UTL: HiRDB file system area for utilities

SVR: HiRDB file system area for all purposes (except for utilities)

-e: Specifies the maximum number of secondary allocations for the HiRDB files.

/svr01DB001: Specifies a name for the HiRDB file system area (character special file or regular file) that is to be created. If this is a character special file, specify a symbolically linked name.

Duplicating the HiRDB file system area using a mirror disk

If the HiRDB file system area is to be duplicated using a mirror disk, the following should be done:

• 3050RX group or 3500/3xx
  Specify in the pdfmkfs command the name of the character special file on the master disk (/dev/rdsk/rdskxxx) or the name linked symbolically to it.
  
• 3500 series (except 3500/3xx)
  Specify in the pdfmkfs command the mirror special file name (/dev/mirror/rdskxxx) or the name linked symbolically to it.
  

It is recommended that after the command has executed you check whether or not the execution results are correct. For details on how to check command execution results, see the manual HiRDB Version 8 Command Reference.