Installation guide

Administration of the NFS is documented in the Network Administration
manual.
The Technical Overview points you to sources of information about these
file systems:
• Memory File System (MFS)
• /proc File System (PROCFS)
• File-on-File Mounting File System (FFM)
• File Descriptor File System (FDFS)
7.1.1 Disk Partitions
A disk consists of storage units called sectors. Each sector is usually 512
bytes. A sector is addressed by the logical block number (LBN). The LBN is
the basic unit of the disk’s user-accessible data area that you can address.
The first LBN is numbered 0, and the highest LBN is numbered one less
than the number of LBNs in the user-accessible area of the disk.
Sectors are grouped together to form up to eight disk partitions. However,
disks differ in the number and size of partitions. The /etc/disktab file
contains a list of supported disks and the default partition sizes for the
system. Refer to the disktab
(4) reference page for more information.
Disk partitions are logical divisions of a disk that allow you to organize
files by putting them into separate areas of varying sizes. Partitions hold
data in structures called file systems and can also be used for system
operations such as paging and swapping. File systems have a hierarchical
structure of directories and files, which is described in Section 7.1.3. By
selecting the file systems to be placed in a partition, you can monitor the
growth and activity of the disk.
Disk partitions have default sizes that depend on the type of disk and that
can be altered by using the disklabel command. Partitions are named a
to h. While the allocated space for a partition can overlap another partition,
a properly partitioned disk should not have file systems on overlapping
partitions.
Figure 7–1 shows the default partitions and starting (offset) sectors for an
RZ73 disk:
7–2 Administering the UNIX File System