*** UNIX MANUAL PAGE BROWSER ***

A Nergahak database for man pages research.

Navigation

Directory Browser

1Browse 4.4BSD4.4BSD
1Browse Digital UNIXDigital UNIX 4.0e
1Browse FreeBSDFreeBSD 14.3
1Browse MINIXMINIX 3.4.0rc6-d5e4fc0
1Browse NetBSDNetBSD 10.1
1Browse OpenBSDOpenBSD 7.7
1Browse UNIX v7Version 7 UNIX
1Browse UNIX v10Version 10 UNIX

Manual Page Search

Manual Page Result

0 Command: update | Section: 8 | Source: UNIX v7 | File: update.8
UPDATE(8) System Manager's Manual UPDATE(8) NAME update - periodically update the super block SYNOPSIS /etc/update DESCRIPTION Update is a program that executes the sync(2) primitive every 30 sec- onds. This insures that the file system is fairly up to date in case of a crash. This command should not be executed directly, but should be executed out of the initialization shell command file. SEE ALSO sync(2), sync(1), init(8) BUGS With update running, if the CPU is halted just as the sync is executed, a file system could be damaged. (This used to be the case with DEC hardware that wrote zeros when NPR requests failed.) A fix would be to have sync(1) temporarily increment the system time by at least 30 sec- onds to trigger the execution of update. This would give 30 seconds grace to halt the CPU. UPDATE(8)

Navigation Options