HP Visualize b2000 hp enterprise file system: release note for hp DCE/9000 enh - Page 28

cm sethardmount

Page 28 highlights

Information About This Version Known Problems and Workarounds • Files exported from an (Episode) LFS will behave as if POSIX_CHOWN_RESTRICTED is true. This means that only a privileged user can change ownership of (chown) a file. In general, the file owner is not privileged, and cannot chown a file. This differs from the behavior of other HP-UX file systems (HFS, VxFS, NFS) and from a DFS exported UFS file, all of which allow file owners to chown files they own. A privileged user is either the DCE network root identity or a user specified in the group specified by the -admingroup option of the fxd command that starts a DFS file server. By default, that group is subsys/dce/dfs-admin and its members include cell_admin. • A daemon process needs appropriate DCE credentials to access files and perform its duties; or the files need to have the correct ACLs to allow the daemon to access it. • DFS behaves like NFS soft-mount by default if a file server becomes unavailable. (See the cm sethardmount command in the "Installing and Configuring Enhanced DFS 3.0" chapter for information about setting hard mount semantics.) • DFS file locking works just like local file locking via lockf() or fcntl(). 28

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40

28
Information About This Version
Known Problems and Workarounds
Files exported from an (Episode) LFS will behave as if
POSIX_CHOWN_RESTRICTED is true. This means that only a privileged user
can change ownership of (
chown
) a file. In general, the file owner is not
privileged, and cannot
chown
a file. This differs from the behavior of other
HP-UX file systems (HFS, VxFS, NFS) and from a DFS exported UFS file, all of
which allow file owners to
chown
files they own.
A privileged user is either the DCE network root identity or a user specified in
the group specified by the
-admingroup
option of the
fxd
command that starts a
DFS file server. By default, that group is
subsys/dce/dfs-admin
and its members
include
cell_admin
.
A daemon process needs appropriate DCE credentials to access files and perform
its duties; or the files need to have the correct ACLs to allow the daemon to access
it.
DFS behaves like NFS
soft-mount
by default if a file server becomes unavailable.
(See the
cm sethardmount
command in the “Installing and Configuring
Enhanced DFS 3.0” chapter for information about setting hard mount semantics.)
DFS file locking works just like local file locking via
lockf()
or
fcntl()
.