Open System Services Management and Operations Guide (G06.30+, H06.08+, J06.03+)

Table 2 Management and Operations Tasks (continued)
SeeSubtaskTask
“Managing and Repairing Fileset Catalog Files” (page 170)CVTUsing
“Checking and Repairing Fileset Integrity” (page 159)FSCK
“Open System Services Monitor” (page 251)OSS Monitor
“Using OSS Monitor Commands” (page 55), and the SCF Reference
Manual for G-Series RVUs
SCF
“Managing Problems” (page 249), and the Guardian User’s GuideVPROC
OSS File System Concepts
You use the OSS file system in the same way as you use a UNIX file system. The OSS file system
provides the same functionality as a UNIX file system, but the OSS system is implemented differently
internally. Because the OSS environment must work with the Guardian environment and the NonStop
operating system, the OSS environment has the following major differences from the standard
UNIX operating system:
• Disk management through the NonStop operating system. The portion of the NonStop operating
system software that performs read, write, and lock operations on disk volumes is known as
the disk process, shown in Figure 1 (page 30).
• OSS pathnames, which have underlying Guardian filenames. The mapping between OSS
pathnames and Guardian filenames is known as filename resolution, and it is done by an
OSS name server.
• The /G directory, which contains filesets for local files in the Guardian namespace, and the
/E directory, which contains files on other nodes in the network.
• The /dev directory being used in a special way.
Figure 1 Guardian Filenames and OSS Files
OSS Files
OSS data files are stored under directories. Directories are grouped together for storage purposes;
each group of directories is administered as an entity called a fileset.
Every OSS data file (called a disk file or a regular file) has a unique pathname and an underlying
Guardian filename. An OSS name server process translates OSS file pathnames to and from
Guardian filenames. The OSS name server also maintains the file and directory catalogs for the
30 Introducing Open System Services