On Mittwoch, 22. März 2017 08:43:43 CET Per Jessen wrote:
> Alexander Graf wrote:
> > On 20/03/2017 16:11, Eric Curtin wrote:
> >> Yeah "iburst" was all that this needed. It's perfect for my needs at
> >> least. Haven't seen anything like that in my dracut scripts either.
> >> Similar to Per, I may not be looking for the right thing.
> > 
> > I can't find it anymore either. Odd.
> > 
> > So historically we used to have a hack that set the system time to the
> >
> > initrd build time if it was bogus:
> >https://github.com/openSUSE/mkinitrd/blob/ad190ad24a9f3881afa11c47aecc8625b
> >286d0d4/scripts/boot-start.sh#L210>
> > That got removed with the transition to dracut and I seem to remember
> > that the hack we then added was to take the last mounted time from
> > your / file system and apply that as system time. But I agree that I
> > can't find any reference to it.
> > 
> > I'm surprised any of the non-RTC ARM systems boot at all then - ext3
> > used to complain really loudly if the last mount time was newer than
> > the system time.
> 
> I've just had to reboot my nanopi, it came up with "2017-01-10
> 11:53:57".  In dmesg, the built-in rtc reports
> 
> [    6.965339] sun6i-rtc 1f00000.rtc: setting system clock to 1970-01-01
> 00:00:13 UTC (13)
> 
> Looking at the root file system:
> 
> # tune2fs -l /dev/mmcblk0p2
> tune2fs 1.43.3 (04-Sep-2016)
> Filesystem volume name:   ROOT
> Last mounted on:          /
> [snip]
> Filesystem created:       Thu Jan 19 04:00:24 2017
> Last mount time:          Tue Jan 10 11:54:03 2017
> Last write time:          Tue Jan 10 11:53:59 2017
> Mount count:              57
> Maximum mount count:      -1
> Last checked:             Tue Mar  7 21:59:21 2017
> 
> So, something did set the time?  I mean, that timestamp from 2017/01/10
> must come from somewhere?

If you only reboot, i.e. keep the power supply connected, the RTC does its 
job. It is not battery backed, but still an RTC.

Kind regards,

Stefan


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