Path: utzoo!attcan!uunet!elroy.jpl.nasa.gov!sdd.hp.com!ucsd!nosc!crash!pnet01!cwr
From: cwr@pnet01.cts.com (Will Rose)
Newsgroups: comp.os.minix
Subject: Sync()
Message-ID: <7780@crash.cts.com>
Date: 1 Mar 91 07:56:01 GMT
Sender: root@crash.cts.com
Organization: People-Net [pnet01], El Cajon CA
Lines: 32

greg@viewlogic.com (Gregory Larkin) writes:
 
>related question:  say I have 3 HD partitions mounted.  I log out. Is
>                  it safe to reboot at this time, or must all
>                  partitions be umounted first?
 
cechew@bruce.cs.monash.edu.au (Earl Chew) writes:
 
>No. You must sync all file systems before rebooting. I also unmount all file
>systems before sync().
 
Init does a sync call at the top of its main loop, so logging-out will
clean up everything provided that you wait until disk activity ceases.
An extra sync doesn't hurt, though.
 
I keep the root file system in RAM (the default), so don't have to unmount
file systems before rebooting.  I assume if I kept the root file system
on the HD, and rebooted without first unmounting additional file systems,
I'd get complaints from mount of the form "device in use"; but I haven't
tried this.
 
Good luck - Will
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