Chapter 3 File System Enhancements

This chapter describes the following new system administration information:

• "DVD Support"

• "Using the Universal Disk Format File System "

• "Deferred Access Time Updates on UFS File Systems"

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Note -

For the most up-to-date man pages, use the man command. The Solaris 7 11/99 man pages include new feature information not found in the Solaris 7 Reference Manual Collection.

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DVD Support

The Solaris 7 11/99 release provides support for digital versatile disc or digital video disc (DVD devices), the optical media technology that is both readable and re-writable, on certain SPARC and Intel based systems.

See the following section for information on accessing information on DVD devices through the UDF file system. This information supplements information found in System Administration Guide, Volume I.

Using the Universal Disk Format File System

The Solaris 7 11/99 release provides support for Universal Disk Format (UDF) , the industry-standard format for storing information on DVD devices. This information supplements information found in System Administration Guide, Volume I.

The UDF file system is provided as dynamically loadable, 32-bit and 64-bit modules, with system administration utilities for creating, mounting, and checking the file system on both SPARC and Intel platforms. The Solaris UDF file system works with supported ATAPI and SCSI DVD drives, CD-ROM devices, and disk and diskette drives. In addition, the Solaris UDF file system is fully compliant with the UDF 1.50 specification.

The UDF file system support is provided in the following new packages:

• SUNWudfr -- 32-bit kernel component

• SUNWudfxr -- 64-bit kernel component

• SUNWudf -- /usr component

UDF Features and Benefits

In the Solaris 7 11/99 release, the UDF file system provides the following features:

• Ability to access the industry standard CD-ROM and DVD-ROM media when they contain a UDF file system.

• Flexibility in exchanging information across platforms and operating systems.

• A mechanism for implementing new applications rich in broadcast-quality video, high-quality sound along with the richness in interactivity using DVD video specification based on UDF format.

The following features are not included in this UDF file system release:

• Support for write-once media, CD-RW and DVD-RAM, with both the sequential disk-at-once and incremental recording.

• UFS components such as quotas, ACLs, transaction logging, file system locking, and file system threads, which are not UDF 1.50 specification requirements.

Hardware and Software Requirements

The UDF file system requires the following:

• The Solaris 7 11/99 release

• Supported SPARC or Intel platforms

• Supported CD-ROM or DVD-ROM device

UDF Compatibility Issues

This first Solaris UDF file system implementation provides:

• Support for industry-standard read-write UDF version 1.50.

• Fully internationalized file system utilities.

How to Connect a DVD-ROM Device

1. Become superuser.

2. Create the /reconfigure file.

   # touch /reconfigure

3. Shut down the system and turn off power.

   # init 0

4. Connect the DVD-ROM device.

5. Turn on power to the system.

How to Access Files on a DVD-ROM Device

1. Verify the DVD-ROM device is automatically mounted.

   $ ls /cdrom

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   Note -

   If the system has both a CD-ROM and DVD-ROM device, the CD-ROM might be named /cdrom/cdrom0 and the DVD-ROM might be named /cdrom/cdrom1. If the system only has a DVD-ROM device, then try using /cdrom/cdrom0.

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2. Display content with the ls command.

   $ ls /cdrom/cdrom1 Copyright filea fileb

   Automatic display with the Common Desktop Environment (CDE) file manager is not implemented yet. All other CDE file manager functions--drag and drop for copying and ImageTool features--are available.

How to Display UDF File System Parameters

Display UDF file system parameters by using the mkfs command.

1. Become superuser.

2. Display UDF file system parameters.

   # mkfs -F udfs -m /dev/rdsk/device-name

How to Create a UDF File System

Create a UDF file system by using the mkfs command.

1. Become superuser.

2. Create a UDF file system.

   # mkfs -F udfs /dev/rdsk/device-name

3. Verify the UDF file system is created by mounting it.

See the man page, mkfs_udfs.1m, for more information.

How to Identify the UDF File System Type

Identify the UDF file system type by using the fstyp command.

1. Become superuser.

2. Determine whether a file system is a UDF file system.

   # fstyp -v /rdev/dsk/device-name

How to Check a UDF File System

Check the integrity of a UDF file system by using the fsck command.

1. Become superuser.

2. Check a UDF file system.

   # fsck -F udfs /dev/rdsk/device-name

See the man page, fsck_udfs.1m, for more information.

How to Mount a UDF File System

Mount a UDF file system.

1. Become superuser.

2. Mount a UDF file system.

   # mount -F UDFS /dev/dsk/device-name /mount-point

3. Verify the UDF file system is mounted.

   # ls /mount-point

See the man page, mount_udfs.1m, for more information.

How to Unmount a UDF File System

Unmount a UDF file system.

1. Become superuser.

2. Unmount a UDF file system.

   # umount /dev/dsk/device-name

How to Label a Device With a UDF File System and Volume Name

Create a file system and volume name for a UDF file system.

1. Become superuser.

2. Create a file system and volume name for the UDF file system.

   # labelit -F UDFS /dev/rdsk/device-name fsname volume

See the man page, labelit_udfs.1m, for more information.

Deferred Access Time Updates on UFS File Systems

This feature was new in the Solaris 7 3/99 software release.

This information supplements information on mounting UFS file systems found in "The UFS File System" in System Administration Guide, Volume I and referenced in the Solaris Transition Guide.

Two new mount options, dfratime and nodfratime enable and disable deferred access time updates on UFS file systems.

When enabled, writing access time updates for the file system may be deferred until the disk is accessed for a reason other than updating access times. The default behavior is dfratime. Use the nodfratime option to disable this feature.

In addition, the mount option, noatime, turns off access time recording regardless of the dfratime/nodfratime value.

For specific information about UFS mount options, see the man page mount_ufs(1M).