Default Logging and Standards Conformance

UFS file system transactions that free blocks from files might not immediately add the freed blocks to the file system's free list. This behavior occurs on a system that has a UFS file system mounted with logging enabled.

This behavior improves file system performance, but does not conform to the following standards:

• POSIX, Single UNIX® Specification

• SPARC® Conformance Definition

• SPARC Conformance Definition System V Application Binary Interface

• System V Interface Definition

• X/Open® Portability Guide

These standards require that freed space be available immediately.

Consider disabling UFS logging under the following conditions:

• You want to enable standards conformance regarding file deletions.

• You encounter problems creating or growing files immediately after the files have been deleted on a relatively full file system.

For more information, see mount_ufs(1M).