C.0 POSIX File System Support

This section provides information regarding the TSAFS support of POSIX-compliant file systems like BtrFS, ReiserFS, Ext2, Ext3, and XFS file systems on the Novell Open Enterprise Server (OES) 11 SP2. These file systems are sometimes referred to in the document as non-NSS file systems.

POSIX-compliant means file systems that comply to the IEEE Std 1003.1 system interfaces. For more information, See Open Group Publications Web site.

Backup of Linux POSIX file systems requires that ACLS and POSIX permissions be set on the Linux path for the LUM-enabled user performing the backup. The root user has all permissions needed to perform backup of any Linux path. You can use the Linux chmod(8) and chown(8) commands to give the backup user the Linux POSIX permissions to the directory being backed up.

The following table lists metadata that is backed up or restored to non-NSS file systems on OES 11 SP2. The table uses the definition of metadata structure fields from the definition of the structure stat. (See man page stat(2) for more information)

Metadata

Description

st_mode

Mode of the file, including File types and File access permissions

st_nlink

Number of hard links to the file

st_uid

User ID of the file

st_gid

Group ID of the file

off_t

Size of the file

st_atime

Time of last access

st_mtime

Time of last data modification

File Types

Additionally, TSAFS also backs up the following information for a file or directory (when applicable),

For more information on extended ACLs, see POSIX Access Control Lists on Linux.

For more information on file attributes on a Linux second extended file system, see man page chattr(1), installed by the RPM e2fsprogs.

POSIX Compliant File Systems Limitations