Martinv at 12:46, 16 December 2025

2025-12-16T12:46:00Z

← Older revision		Revision as of 12:46, 16 December 2025
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	* {{Template:SysmanI}} on initializing and mounting volumes		* {{Template:SysmanI}} on initializing and mounting volumes
	* {{Template:Sec}} on security		* {{Template:Sec}} on security

			[[Category:Volume Management]]

Jane.doe at 11:05, 3 December 2019

2019-12-03T11:05:02Z

← Older revision		Revision as of 11:05, 3 December 2019
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	A '''volume''' is a mass storage medium, such as a disk or tape, that is in [[ODS-2]] or [[ODS-5]] format. Volumes contain files and may be mounted on devices. A volume is identified by the volume label (as opposed to a [[Device\|device]] identified by a [[Device Name\|device name]].		A '''volume''' is a mass storage medium, such as a disk or tape, that is in [[ODS-2]] or [[ODS-5]] format. Volumes contain files and may be mounted on devices. A volume is identified by the volume label (as opposed to a [[Device\|device]] identified by a [[Device Name\|device name]]).

	=Volume Characteristics=		=Volume Characteristics=

Darya.zelenina: Created page with "A '''volume''' is a mass storage medium, such as a disk or tape, that is in ODS-2 or ODS-5 format. Volumes contain files and may be mounted on devices. A volume is ide..."

2019-03-30T16:48:12Z

Created page with "A '''volume''' is a mass storage medium, such as a disk or tape, that is in ODS-2 or ODS-5 format. Volumes contain files and may be mounted on devices. A volume is ide..."

New page

A '''volume''' is a mass storage medium, such as a disk or tape, that is in [[ODS-2]] or [[ODS-5]] format. Volumes contain files and may be mounted on devices. A volume is identified by the volume label (as opposed to a [[Device|device]] identified by a [[Device Name|device name]].

=Volume Characteristics=
Volume characteristics are set with the INITIALIZE and SET VOLUME commands:
* XFC caching
* data check (checks can be performed following all read operations or all write operations)
* erase on delete
* default extension size
* default file protection (only used by RSX-11M systems; OpenVMS uses default process protection)
* [[High-water Marking|high-water marking]]
* [[Volume Label|volume label]]
* volume expansion limit
* [[Mount Verification|mount verification]]
* retention time
* size
* structure level: ODS-2 or ODS-2
* [[Protected Subsystem|protected subsystems enabled]]
* enabled for unloading at dismount
* [[Hardlink|hardlinks]]
* access dates
* windows (the number of mapping pointers to be allocated for file windows)

=Protection of Volumes=

Users may have access to files and directories on a volume, but they cannot access them if they do not also have access to the volume itself.

Volumes have four access types: Read, Write, Create, Delete. The volume's owner and users with [[VOLPRO]] privilege have control access to the volume. By default, the following protection is set for volumes:
* Volumes initialized /SYSTEM are owned by [1,1]; all users have W:RWCD to the volume, but only system processes can create first-level directories
* Volumes initialized /GROUP have no access for World but all access for System, Owner, and Group.
* Volumes initialized /NOSHARE have RWD access for System and Owner and no access for World or Group (unless /GROUP is specified).

The volume's security profile is saved in the [[Master File Directory|master file directory]] of the volume as [[SECURITY.SYS]].

A different protection setting can be specified with the INITIALIZE command. Volume protection settings can be changed with SET VOLUME and SET SECURITY /CLASS=VOLUME; [[ACL|ACLs]] can be added with SET SECURITY.

Security auditing can be enabled for volumes with SET AUDIT/ENABLE=ACCESS=access type /CLASS=volume /AUDIT (See [[SET AUDIT Events]] for details). However, some limitations apply:

* The system does not audit volume creation or deletion.
* The system does not audit access for tapes, ODS-1, or foreign-mounted volumes.

Security auditing can also be enabled for mount and dismount operations with SET AUDIT /ENABLE=MOUNT

=See also=
* {{Template:SysmanI}} on initializing and mounting volumes
* {{Template:Sec}} on security

Volume - Revision history

Martinv at 12:46, 16 December 2025

Jane.doe at 11:05, 3 December 2019

Darya.zelenina: Created page with "A '''volume''' is a mass storage medium, such as a disk or tape, that is in ODS-2 or ODS-5 format. Volumes contain files and may be mounted on devices. A volume is ide..."