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Pi3: /etc/default/rcS --> FSCKFIX=yes?
Posted: Wed Apr 13, 2016 12:50 am
by Rive
Pros and cons to leaving this file checker uncommented and enabled on an overclocked pi3?
Code: Select all
# automatically repair filesystems with inconsistencies during boot
FSCKFIX=yes
Re: Pi3: /etc/default/rcS --> FSCKFIX=yes?
Posted: Wed Apr 13, 2016 3:36 pm
by Rive
Anyone familiar with FSCKFIX?
Re: Pi3: /etc/default/rcS --> FSCKFIX=yes?
Posted: Sun Apr 17, 2016 3:37 pm
by Rive
Anyone?
Re: Pi3: /etc/default/rcS --> FSCKFIX=yes?
Posted: Sun Apr 17, 2016 3:46 pm
by jojopi
If you do not know what FSCKFIX means, then it is best not to change it.
I suspect you do have some idea what it means, and some theory why you might want to change it. It would be good to outline your thoughts and understandings and then ask for advice. People are unlikely to write a detailed response to a vague question, and even if they did it might not address your particular concerns.
Re: Pi3: /etc/default/rcS --> FSCKFIX=yes?
Posted: Sun Apr 17, 2016 3:53 pm
by Rive
jojopi wrote:If you do not know what FSCKFIX means, then it is best not to change it.
I suspect you do have some idea what it means, and some theory why you might want to change it. It would be good to outline your thoughts and understandings and then ask for advice. People are unlikely to write a detailed response to a vague question, and even if they did it might not address your particular concerns.
It is simple. I am heavily overclocked (both SoC and HC-1 Sdcard). I want the file system scanned for inconsistencies, fixed/repaired as necessary at boot to prevent potential issues/corruption that could result in a non-bootable event (requiring restoral of backup image to sdcard).
My question is thus:
This is by default, commented out and set to"no" (which I assume means (if uncommented) run at boot, but do not auto fix).
I just want to know is it advantageous in any way to run this automatically at boot, or is it commented out/disabled for a reason? and not worth enabling or setting to "yes"?
In otherwords, simply put, and in a nutshell:
Pros and cons to leaving this file checker uncommented and enabled on an overclocked pi3?
Re: Pi3: /etc/default/rcS --> FSCKFIX=yes?
Posted: Sun Apr 17, 2016 4:14 pm
by DirkS
Isn't this overridden in current RPF Raspbian images using the kernel command line?
/boot/cmdline.txt:
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dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait
Re: Pi3: /etc/default/rcS --> FSCKFIX=yes?
Posted: Sun Apr 17, 2016 4:18 pm
by Rive
DirkS wrote:Isn't this overridden in current RPF Raspbian images using the kernel command line?
/boot/cmdline.txt:
Code: Select all
dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait
Are you saying that uncommenting this is useless?
sudo nano /etc/default/rcS
Code: Select all
# automatically repair filesystems with inconsistencies during boot
#FSCKFIX=no
Re: Pi3: /etc/default/rcS --> FSCKFIX=yes?
Posted: Sun Apr 17, 2016 4:21 pm
by jojopi
Nothing can repair data corruption if it has happened. fsck simply makes filesystem metadata consistent. (So, directories cannot be their own parent, no two files have the same name, all space either belongs to exactly one file or is free; things like that.) You may still lose data, including stuff that is needed for boot.
FSCKFIX does not control whether fsck runs, but whether it "fixes" everything without user interaction. With "no", it will abort and give you a root shell if the errors are too serious. If your goal is to manually recover as much data as possible, you might want that. If you have backups, you might prefer to let fsck try its best.
In the Foundation's spindle-era images, FSCKFIX=yes was actually the default. In recent images, /boot/cmdline.txt has "fsck.repair=yes". I believe that takes precedence and is basically equivalent. If you want "no", remove the stanza from /boot/cmdline.txt as well.
Re: Pi3: /etc/default/rcS --> FSCKFIX=yes?
Posted: Sun Apr 17, 2016 4:28 pm
by Rive
jojopi wrote:Nothing can repair data corruption if it has happened. fsck simply makes filesystem metadata consistent. (So, directories cannot be their own parent, no two files have the same name, all space either belongs to exactly one file or is free; things like that.) You may still lose data, including stuff that is needed for boot.
FSCKFIX does not control whether fsck runs, but whether it "fixes" everything without user interaction. With "no", it will abort and give you a root shell if the errors are too serious. If your goal is to manually recover as much data as possible, you might want that. If you have backups, you might prefer to let fsck try its best.
In the Foundation's spindle-era images, FSCKFIX=yes was actually the default. In recent images, /boot/cmdline.txt has "fsck.repair=yes". I believe that takes precedence and is basically equivalent. If you want "no", remove the stanza from /boot/cmdline.txt as well.
Thanks.