Date: Wed, 19 Feb 2014 13:44:21 -0500 From: John Baldwin <jhb@freebsd.org> To: freebsd-current@freebsd.org Cc: Bruno =?iso-8859-1?q?Lauz=E9?= <brunolauze@msn.com> Subject: Re: Device File Creation Time Message-ID: <201402191344.21738.jhb@freebsd.org> In-Reply-To: <BLU179-W85177DFBBF69A9D7B02C66C6980@phx.gbl> References: <BLU179-W85177DFBBF69A9D7B02C66C6980@phx.gbl>
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On Tuesday, February 18, 2014 3:02:16 pm Bruno Lauzé wrote: > root@pcbsd:/dev # stat /dev/ada0 > 1895890688 97 crw-rw-rw- 1 root operator 97 0 "Feb 18 10:52:11 2014" "Feb 17 09:36:43 2014" "Feb 17 09:36:43 2014" "Dec 31 17:59:59 1969" 4096 0 0 /dev/ada0 > > root@pcbsd:/dev # stat /dev/ada0p2 > 1895890688 103 crw-rw-rw- 1 root operator 103 0 "Feb 18 10:52:05 2014" "Feb 17 09:36:43 2014" "Feb 17 09:36:43 2014" "Dec 31 17:59:59 1969" 4096 0 0 /dev/ada0p2 > > root@pcbsd:/dev # stat /dev/ada0p3 > 1895890688 105 crw-rw-rw- 1 root operator 105 0 "Feb 18 10:52:21 2014" "Feb 17 09:36:43 2014" "Feb 17 09:36:43 2014" "Dec 31 17:59:59 1969" 4096 0 0 /dev/ada0p3 > > As we can see all files in devfs reports Dec 31 1969 as creation time. > > Can we look to manage this value to know when a certain device was installed? > > It would be really great to know when a disk was replaced. > > Would there be any other mechanism to accomplish this? I think if you hot attach a device post-boot it will have the time it was attached as the birth time. I think it is only devices created during boot that use time 0. -- John Baldwin
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