Re: how to disable fsck when power failure
On Tue, 08 Nov 2011, co...@tetrachina.com wrote: misc#,Dz:C#! when the box with OpenBSD had a power failure and the system did not unmount properly. it sometimes gets stuck.The system is asking me to RUN fsck MANUALLY. as a gateway ,so i can't go to fix it manually everytime.How do I advoid this? i want to disable it crumbling to single mode. thanks. /dev/rwd0e: UNEXPECTED INCONSISTENCY; RUN fsck_ffs MANUALLY. AUTOMATIC FILE SYSTEM CHECK FAILED; HELP! Enter pathname of shell or RETURN for sh: Best Regards You can try something like this patch: Index: rc === RCS file: /cvs/src/etc/rc,v retrieving revision 1.396 diff -u -p -r1.396 rc --- rc 13 Oct 2011 07:54:06 - 1.396 +++ rc 8 Nov 2011 10:08:35 - @@ -294,8 +294,16 @@ elif [ X$1 = Xautoboot ]; then exit 1 ;; 8) - echo Automatic file system check failed; help! - exit 1 + echo File system check failed; trying fsck -y. + fsck -y + case $? in + 0) + ;; + *) + echo Ok, now it's really fscked... + exit 1 + ;; + esac ;; 12) echo Boot interrupted.
Re: how to disable fsck when power failure
On Tue Nov 8 2011 17:41, co...@tetrachina.com wrote: misc#,Dz:C#! when the box with OpenBSD had a power failure and the system did not unmount properly. it sometimes gets stuck.The system is asking me to RUN fsck MANUALLY. as a gateway ,so i can't go to fix it manually everytime.How do I advoid this? Disabling or skipping fsck(8)s is generally a very bad idea. However, you could install a UPS. Further, partition your discs properly and mount filesystems, if possible, read-only. This greatly minimises the risk of filesystem inconsistencies/corruption. Norman.
Re: how to disable fsck when power failure
On Tue, 8 Nov 2011 11:09:32 +0100 David Coppa dco...@gmail.com wrote: You can try something like this patch: Index: rc === RCS file: /cvs/src/etc/rc,v retrieving revision 1.396 diff -u -p -r1.396 rc --- rc13 Oct 2011 07:54:06 - 1.396 +++ rc8 Nov 2011 10:08:35 - @@ -294,8 +294,16 @@ elif [ X$1 = Xautoboot ]; then exit 1 ;; 8) - echo Automatic file system check failed; help! - exit 1 + echo File system check failed; trying fsck -y. + fsck -y + case $? in + 0) + ;; + *) + echo Ok, now it's really fscked... + exit 1 + ;; + esac ;; 12) echo Boot interrupted. It would depend on your purpose as to whether the above was the best aproach or making the system read-only with an mfs /tmp /var? and exported logs. Something which is far easier with OpenBSD than most OS.
Re: how to disable fsck when power failure
Disabling or skipping fsck(8)s is generally a very bad idea. Norman. @Norman: is it! BTW... @Cosmo Wu man 5 fstab is your friend. Quick and dirt: Edit /etc/fstab and change the last digit of the corrispondent mount point line form [1|2] to 0 Ex. default 515f3560ef6f35f5.a / ffs rw 1 1 to 515f3560ef6f35f5.a / ffs rw 1 0 Bye Matteo
Re: how to disable fsck when power failure
On Tue Nov 8 2011 12:03, Matteo Leccardi wrote: Disabling or skipping fsck(8)s is generally a very bad idea. Norman. @Norman: is it! BTW... @Cosmo Wu man 5 fstab is your friend. Quick and dirt: Edit /etc/fstab and change the last digit of the corrispondent mount point line form [1|2] to 0 Ex. default 515f3560ef6f35f5.a / ffs rw 1 1 to 515f3560ef6f35f5.a / ffs rw 1 0 It must be said again, it is absolutely risky and unsafe to skip fsck(8)s for root filesystems in particular. If you have not taken any precaution to prevent or to detect a filesystem corruption, then chances are, you render your system non-operational very easily. You have the choice.
Re: how to disable fsck when power failure
On Nov 08 12:03:33, Matteo Leccardi wrote: Quick and dirt: Edit /etc/fstab and change the last digit of the corrispondent mount point line form [1|2] to 0 Ex. default 515f3560ef6f35f5.a / ffs rw 1 1 to 515f3560ef6f35f5.a / ffs rw 1 0 and run with an unclean root filesystem. Way to go!
Re: how to disable fsck when power failure
Curiosity killed the cat What I wrote is (totally unwise and) wrong. Setting 515f3560ef6f35f5.a / ffs rw 1 0 result is a system with an unclean root filesystem, mounted read-only booting in single user mode. Btw; from fstab(5) If the sixth field is not present or is zero, a value of zero is returned and fsck(8) will assume that the filesystem does not need to be checked. Fall back to previuos post: properly partition your drive and mount filesystems, if possible, read-only. for i in 1 2 3 4 5; do echo I'm sorry sleep 2; done Matteo 2011/11/8 Matteo Leccardi m.lecca...@gmail.com Disabling or skipping fsck(8)s is generally a very bad idea. Norman. @Norman: is it! BTW... @Cosmo Wu man 5 fstab is your friend. Quick and dirt: Edit /etc/fstab and change the last digit of the corrispondent mount point line form [1|2] to 0 Ex. default 515f3560ef6f35f5.a / ffs rw 1 1 to 515f3560ef6f35f5.a / ffs rw 1 0 Bye Matteo
Re: how to disable fsck when power failure
Hi,Matteo Leccardi ccThanks guys for all your replys. appreciate it. Matteo , before i maned the fstab ,and found it ' If the sixth field is not present or is zero, a value of zero is returned and fsck(8) will assume that the filesystem does not need to be checked. but it didn't works ,there something funny came across . after the failure ,the OpenBSD system repeated rebooting. so i had to boot into single mode ,and edited it again to the default setting ,then it recovered. i can't transfer the /var to mfs ,because i have to accumulate some logs ,such as mrtg/trafd logs .--would you mind telling how to transfer the /var/ to MFS ? thank you very much . @Norman Golisz , thanks your suggesting . but the little box with OpenBSD like Soekris works under mal-condition , i don't intend to suply a UPS. could any ways be done to avoid /disable fsck and jump to single user mode ? thanks. @David Coppa , thanks for your patch , i will try that .did it work for you now ? Disabling or skipping fsck(8)s is generally a very bad idea. Norman. @Norman: is it! BTW... @Cosmo Wu man 5 fstab is your friend. Quick and dirt: Edit /etc/fstab and change the last digit of the corrispondent mount point line form [1|2] to 0 Ex. default 515f3560ef6f35f5.a / ffs rw 1 1 to 515f3560ef6f35f5.a / ffs rw 1 0 Bye Matteo = = = = = = = = = = = = = = = = = = = = = = h4 g$o ccco...@tetrachina.com ccco...@tetrachina.com c2011-11-09
Re: how to disable fsck when power failure
On 11/08/11 04:41, co...@tetrachina.com wrote: misc#,Dz:C#! when the box with OpenBSD had a power failure and the system did not unmount properly. it sometimes gets stuck.The system is asking me to RUN fsck MANUALLY. as a gateway ,so i can't go to fix it manually everytime.How do I advoid this? i want to disable it crumbling to single mode. thanks. /dev/rwd0e: UNEXPECTED INCONSISTENCY; RUN fsck_ffs MANUALLY. AUTOMATIC FILE SYSTEM CHECK FAILED; HELP! Enter pathname of shell or RETURN for sh: Best Regards Cosmo Wu I have run a lot of OpenBSD gateway machines, I almost always power them down by wacking the power switch, not by orderly shutdown, and yet, only a very few times has one not come back up well and on their own. I tend to use very small (by modern standards) partitions (i.e., only a small part of a modern disk. No one says you have to allocate all 250G of a 250G disks. You can leave 246G unallocated!), so the fsck times will be tolerable. So, I suspect you are doing something OTHER than running just a gateway, something that is causing more disk activity than a typical gateway does. After your first post, you mentioned mrtg. Ah-hah. I think the answer is, move mrtg to another machine, let your gateway be a gateway. I think that will reduce your problem to manageable levels. The few times I had an OpenBSD gateway not come up on their own at a customer site (I can think of once), I had no trouble walking non-technical people through fsck over the phone. Nick.
