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).