[ptxdist] automatic root-fs fsck at boottime with autorepair

[ptxdist] automatic root-fs fsck at boottime with autorepair

[Marc Michalewicz]

Hello,

how can I configure an automatic filesystemcheck of the root filesystem at boottime ?

The rootf seems to be mounted via udev, in /etc/fstab i could not find anything.
So is it possible ? On one webpage I found "inserting fsck -Aa into /etc/init.d/rcS" before the "mount -a" but this applys only to filesystems which are mounted
via /etc/fstab I think.

I am using a quite old version ptxdist-2011.07.0.

Any help highly appreciated.

Marc


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Re: [ptxdist] automatic root-fs fsck at boottime with autorepair

[Tim Sander]

Hi Marc
> how can I configure an automatic filesystemcheck of the root filesystem at
> boottime ?
I think you need an initrd image for that?

Tim

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Re: [ptxdist] automatic root-fs fsck at boottime with autorepair

[Michael Olbrich]

On Thu, Jan 22, 2015 at 04:59:45PM +0100, Tim Sander wrote:
> > how can I configure an automatic filesystemcheck of the root filesystem at
> > boottime ?
> I think you need an initrd image for that?

No, the rootfs can be checked and fixed, if it is mounted read-only.
Systemd will do this automatically. For a busybox init you need to add the
check yourself.

Michael

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Re: [ptxdist] automatic root-fs fsck at boottime with autorepair

[Marc Michalewicz]

Hi,

thanks for your hint; the issue is still open and I have no clue what to do next
although your answer helped a little bit.

But how/where do I have to install the check ?
Can you detail your idea a little bit more ?

I tried "fsck.ext3 -p /dev/mmvblk0p1" on the line before "mount -a ..." in rcS but this 
did not work: 
"fsck.ext3: No such file or directory while trying to open /dev/mmcblk0p1"


Just fyi in the syslog I found these lines:

Apr 21 11:50:11 [..] [ 1.854104] EXT3-fs: barriers not enabled 
Apr 21 11:50:11 [..] [12.856129] kjournald starting.  Commit interval 5 seconds 
Apr 21 11:50:11 [..] [12.856223] EXT3-fs (mmcblk0p1): warning: maximal mount count reached, running e2fsck is recommended
Apr 21 11:50:11 [..] [13.091387] EXT3-fs (mmcblk0p1): using internal journal 
Apr 21 11:50:11 [..] [13.091398] EXT3-fs (mmcblk0p1): recovery complete 
Apr 21 11:50:11 [..] [13.093917] EXT3-fs (mmcblk0p1): mounted filesystem with ordered data mode

What does all this mean in detail - especially "recovery complete" ?
so another question would be: do you think a (automatic) fsck is needed at all ?
We just encountered an issue in a mysqld-logfile upon an unexpected power-off but 
this was actually not an issue of the filesystem. Anyway I thought a fsck might be helpful sometimes.

Thanks for any help,

Marc


On Mon, 26 Jan 2015, Michael Olbrich wrote:

> On Thu, Jan 22, 2015 at 04:59:45PM +0100, Tim Sander wrote:
>>> how can I configure an automatic filesystemcheck of the root filesystem at
>>> boottime ?
>> I think you need an initrd image for that?
>
> No, the rootfs can be checked and fixed, if it is mounted read-only.
> Systemd will do this automatically. For a busybox init you need to add the
> check yourself.
>
> Michael
>
> -- 
> Pengutronix e.K.                           |                             |
> Industrial Linux Solutions                 | http://www.pengutronix.de/  |
> Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
> Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |
>
> -- 
> ptxdist mailing list
> ptxdist@pengutronix.de
>

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Re: [ptxdist] automatic root-fs fsck at boottime with autorepair

[Bruno Thomsen]

Hi Marc,


> Just fyi in the syslog I found these lines:
>
> Apr 21 11:50:11 [..] [ 1.854104] EXT3-fs: barriers not enabled 
> Apr 21 11:50:11 [..] [12.856129] kjournald starting.  Commit interval 5 seconds 
> Apr 21 11:50:11 [..] [12.856223] EXT3-fs (mmcblk0p1): warning: maximal mount count reached, running e2fsck is recommended
> Apr 21 11:50:11 [..] [13.091387] EXT3-fs (mmcblk0p1): using internal journal 
> Apr 21 11:50:11 [..] [13.091398] EXT3-fs (mmcblk0p1): recovery complete 
> Apr 21 11:50:11 [..] [13.093917] EXT3-fs (mmcblk0p1): mounted filesystem with ordered data mode
>
> We just encountered an issue in a mysqld-logfile upon an unexpected power-off but 
> this was actually not an issue of the filesystem. Anyway I thought a fsck might be helpful sometimes.

You are using the ext3 filesystem in a unsafe manner (default) that can cause data corruption.
Enable barriers and change data mode to journal. The downside to safety is lower R/W performance.

/Bruno

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Re: [ptxdist] automatic root-fs fsck at boottime with autorepair

[Marc Michalewicz]

[-- Attachment #1: Type: text/plain, Size: 2261 bytes --]

Hi,

thanks for your hint; the issue is still open and I have no clue what to do next
although your answer helped a little bit.

But how or where do I have to install the check ?
Could you please detail your idea a little bit more ?

I tried "fsck.ext3 -p /dev/mmvblk0p1" on the line before "mount -a ..." in 
rcS but this did not work:

=> "fsck.ext3: No such file or directory while trying to open /dev/mmcblk0p1"

Just fyi in the syslog I found these lines:

Apr 21 11:50:11 [..] [ 1.854104] EXT3-fs: barriers not enabled 
Apr 21 11:50:11 [..] [12.856129] kjournald starting.  Commit interval 5 seconds 
Apr 21 11:50:11 [..] [12.856223] EXT3-fs (mmcblk0p1): warning: maximal mount count reached, running e2fsck is recommended
Apr 21 11:50:11 [..] [13.091387] EXT3-fs (mmcblk0p1): using internal journal 
Apr 21 11:50:11 [..] [13.091398] EXT3-fs (mmcblk0p1): recovery complete 
Apr 21 11:50:11 [..] [13.093917] EXT3-fs (mmcblk0p1): mounted filesystem with ordered data mode

What does all this mean in detail - especially "recovery complete" ?

Another question in this context: do you think a (automatic) fsck is needed at all with ext3 ?

Thanks for any help,

Marc


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On Mon, 26 Jan 2015, Michael Olbrich wrote:

> On Thu, Jan 22, 2015 at 04:59:45PM +0100, Tim Sander wrote:
>>> how can I configure an automatic filesystemcheck of the root filesystem at
>>> boottime ?
>> I think you need an initrd image for that?
>
> No, the rootfs can be checked and fixed, if it is mounted read-only.
> Systemd will do this automatically. For a busybox init you need to add the
> check yourself.
>
> Michael
>
> -- 
> Pengutronix e.K.                           |                             |
> Industrial Linux Solutions                 | http://www.pengutronix.de/  |
> Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
> Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |
>
> -- 
> ptxdist mailing list
> ptxdist@pengutronix.de
>

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