ptx/EFS V1.5.1 Release Notes

These release notes support ptx/EFS V1.5.1. ptx/EFS lets you create large files and filesystems of up to 1 TB in length for the DYNIX/ptx® operating system. ptx/EFS lets your filesystem have fast reboot and recovery times, online maintenance operations, and full UNIX File System (UFS) compatibility.

Read this document before you install or run this release of ptx/EFS. For information on large-filesystem support, refer to the DYNIX®/ptx Programming Tools Guide. For more information on ptx/EFS, refer to the ptx/EFS and ptx/CFS Administration.


Product Compatibility

Use this version of ptx/EFS with the following products:


Software Installation

The software installation procedure is documented in the DYNIX/ptx and Layered Products Software Installation Release Notes.

If you install ptx/EFS for the root filesystem, create a custom miniroot using the buildmini command. Refer to the buildmini(1M) man page for more information.


1-KB and 2-KB Filesystems Supported, But Not Recommended

Although ptx/EFS supports 1-KB and 2-KB filesystems, performance is better with 4-KB filesystems. In order for an mmap file to be handled correctly, all but the last extent of the file must be a multiple of 4-KB bytes. For 1-KB and 2-KB filesystems, ptx/EFS reallocates extents to be multiples of 4-KB bytes as needed, but performance is slower.


Related Documentation

The following documentation is available on the online documentation CD and at http://webdocs.numaq.ibm.com/:


Problem Reports

This section lists the following problem report summaries:

The numbers in parentheses identify the problems in the problem-tracking system.


Fixed Problems in ptx/EFS V1.5.1

This release of ptx/EFS includes a fix for the following software defect:


Fixed Problems in ptx/EFS V1.5.0

ptx/EFS V1.5.0 includes fixes for the following software defects:


Open Problems in ptx/EFS V1.5.1

This release of ptx/EFS has no known open problems.