Rock Ridge |
 |
For 10.10:
HP-UX 10.10 includes the Portable File System (PFS) from Young
Minds Inc. PFS allows mounting of Rock Ridge, ISO 9660 or High Sierra
CD-ROM disks. ISO and High Sierra file names are all uppercase 8.3;1
format, so they look like
Rock Ridge extensions to ISO 9660 allow full POSIX semantics
and POSIX-like file names, so the file name
becomes
on a Rock Ridge CD-ROM.
Even on ISO or High Sierra disks, PFS mount options allow:
translation of file names from uppercase
to lowercase.
suppression of ";1" version numbers
conversion of ";1" to ".1" suffix
CD-ROM disks mounted on a server machine may be exported to
PFS clients.
Refer to the pfs(4)
and pfs_mount(1M)
manpages for more details.
Kernel-based support for CD-ROMS has also been extended to
allow suppression of version numbers and lowercase matching and
display of names. Refer to the mount_cdfs(1M)
manpage and the description of the cdcase
option.
Journaled File System |
|
On HP-UX 10.0 and earlier releases, the High Performance File
System (HFS) is the standard file system and is the only locally
mounted read/write file system available. With HP-UX 10.01, however,
non-root file systems can use the Journaled File System (referred
to as either VxFS or JFS). HP-UX's implementation is based on the
version from Veritas Software Inc.
VxFS is an extent-based journaling file system that offers
fast file system recovery and online features such as online backup,
online resizing, and online reorganization. It supports all existing
file system interfaces except HP Access Control Lists (ACL) and
B1 security features. VxFS cannot be a root or bootable file system
in 10.01.
There are two VxFS products: base and advanced. The base VxFS
file system has a fast recovery feature and is provided on all 10.01
systems. Advanced VxFS also includes all of the online features,
and is available as an optional product.
HP-UX libraries and commands/utilities have been modified
to support VxFS, and HP-UX commands have been updated to handle
both HFS and VxFS as transparently as possible. You can continue
to use all the commands you are used to, and they will continue
to work with the HFS file system as they always have. These same
commands also support VxFS, but will perhaps have different options
that are meaningful to VxFS. Because all existing file system administration
commands (such as mkfs,
newfs, fsck,
and mount) have
been updated to support both HFS and VxFS, once a VxFS or HFS file
system is created and mounted through SAM, SAM will set up the file
system such that regular maintenance of the file systems will continue
in a manner similar to previous system administration. SAM has been
updated to support basic VxFS, with the exception of online resizing,
online backup, and online reorganization, which must be done from
the command line.
Your existing applications will continue to work with HFS,
and most of them will also work with VxFS. The only applications
that will not work with VxFS are those that are aware of HFS-specific
information, such as HFS disk format, read/write HFS file systems
using the raw or character device, and so on. These applications
cannot deal with any file system types other than HFS because of
their dependency on the HFS disk format. All applications that use
portable file system interfaces such as those specified by POSIX,
X/Open, AES, SVID, and so on will work with all file system types
that support these interfaces.
For an HP-UX file system overview and information on converting
a non-root HFS file system to VxFS, refer to Chapter 4, "Working
with HP-UX File Systems," in the 10.01 version of the HP-UX
System Administration Tasks manual.
Multiple File
System Types |
|
The interface for specifying and detecting file system types
has been expanded in 10.01 so that file systems from HP and third-parties
will be handled more consistently.
In 9.0, there is a constant in mount.h
for each file system type: MOUNT_UFS, MOUNT_CDFS, and MOUNT_NFS.
These constants are used in vfsmount(2),
and are returned by stat(2),
statfs(2), and
statfsdev(3).
To handle more file systems on HP-UX 10.01, an interface similar
to AT&T's SVR4 is used to specify the file system type.
The following is a summary of changes:
vfsmount(2)
is no longer supported, though existing calls still work. Use mount(2)
instead.
mount(2)
is still supported in its old form (HFS only), but also has a new
form in which the file system type is specified as a string.
stat(2),
statfs(2), and
statfsdev(3)
still return file system types as integers. For HFS, NFS, and CDFS,
the mount constants in mount.h
are still valid. However, the more general method for translating
types from integers to strings, or the reverse, is to use sysfs(2),
which works with both old and new file systems. Using sysfs(2)
does the mapping at run time rather than compile time, which allows
you to assign file system type numbers dynamically.
The new routines statvfs(2)
and statvfsdev(3)
return the file system type as a string directly. The older routines
statfs(2) and
statfsdev(3)
are still supported.
Printable version
