Re: recovering from a power outage

2009-02-16 Thread Mel
On Thursday 12 February 2009 16:24:25 A. Wright wrote: Can anyone corroborate that? If so, does anyone know when ed started wanting to make a temp file even before any edits are made? I am sure that ed has gotten me out of similar jams in the past, when I wanted to see part of a file in an

Re: recovering from a power outage

2009-02-13 Thread Polytropon
On Thu, 12 Feb 2009 23:00:16 -0500, Robert Huff roberth...@rcn.com wrote: 1) It was my understanding one has to force-mount a dirty filesuystem. IF this sounds like a practice best left to senior Jedi Masters ... it porbably is. Mounting possibly defective file systems is not a good

Re: recovering from a power outage

2009-02-13 Thread Wojciech Puchar
seeing fsck checking partitions after unclean shutdown, but when everything's okay, there's no problem running into MUM *afterwards*. exactly like me i have background_fsck=NO in rc.conf unix doesn't crash every few hours so it's really not a problem to wait a bit more

Re: recovering from a power outage

2009-02-13 Thread Robert Huff
Wojciech Puchar writes: background_fsck=NO in rc.conf unix doesn't crash every few hours so it's really not a problem to wait a bit more Cases and personal tolerance may vary. One of my machines has a pair of 50gb SCSI disks; running two full passes takes about 7

Re: recovering from a power outage

2009-02-13 Thread Polytropon
On Fri, 13 Feb 2009 08:11:56 -0500, Robert Huff roberth...@rcn.com wrote: One of my machines has a pair of 50gb SCSI disks; running two full passes takes about 7 minutes. I have no idea how long it might take to check a multi-terabyte RAID-mumble set-up. It's not *that* hard to

Re: recovering from a power outage

2009-02-13 Thread Jerry
On Fri, 13 Feb 2009 14:16:13 +0100 Polytropon free...@edvax.de wrote: On Fri, 13 Feb 2009 08:11:56 -0500, Robert Huff roberth...@rcn.com wrote: One of my machines has a pair of 50gb SCSI disks; running two full passes takes about 7 minutes. I have no idea how long it might take to check a

Re: recovering from a power outage

2009-02-13 Thread Wojciech Puchar
One of my machines has a pair of 50gb SCSI disks; running two full passes takes about 7 minutes. I have no idea how long it might take to check a multi-terabyte RAID-mumble set-up. depends of how filesystem was created. multiterabyte arrays are usually used for large files, and

Re: recovering from a power outage

2009-02-13 Thread Robert Huff
IMHO, if you are running a system where 'power outages' cannot be tolerated, why not install a UPS, they are really quite cheap, and be done with it? I cannot imagine any high end, mission critical system not employing one. Power outages are not the only thing which can

Re: recovering from a power outage

2009-02-13 Thread Jerry
On Fri, 13 Feb 2009 10:22:55 -0500 Robert Huff roberth...@rcn.com wrote: IMHO, if you are running a system where 'power outages' cannot be tolerated, why not install a UPS, they are really quite cheap, and be done with it? I cannot imagine any high end, mission critical system not employing

Re: recovering from a power outage

2009-02-13 Thread Polytropon
On Fri, 13 Feb 2009 10:22:55 -0500, Robert Huff roberth...@rcn.com wrote: Power outages are not the only thing which can cause (directly or indirectly) file system corruption. Oh yes, that's so true - I experienced it in July 2008, and I still think it was a software problem... --

Re: recovering from a power outage

2009-02-13 Thread David Newman
On 2/13/09 7:22 AM, Robert Huff wrote: IMHO, if you are running a system where 'power outages' cannot be tolerated, why not install a UPS, they are really quite cheap, and be done with it? I cannot imagine any high end, mission critical system not employing one. Power

Re: recovering from a power outage

2009-02-12 Thread Jerry McAllister
On Thu, Feb 12, 2009 at 04:06:49PM -0800, David Newman wrote: What's the canonical method for checking ufs file systems on a FreeBSD 7.1/amd64 system after an unscheduled power outage? How about fsck jerry thanks dn ___

Re: recovering from a power outage

2009-02-12 Thread David Newman
On 2/12/09 4:41 PM, Jerry McAllister wrote: On Thu, Feb 12, 2009 at 04:06:49PM -0800, David Newman wrote: What's the canonical method for checking ufs file systems on a FreeBSD 7.1/amd64 system after an unscheduled power outage? How about fsck Right. I'm asking procedurally how that's

Re: recovering from a power outage

2009-02-12 Thread Tim Judd
David Newman wrote: On 2/12/09 4:41 PM, Jerry McAllister wrote: On Thu, Feb 12, 2009 at 04:06:49PM -0800, David Newman wrote: What's the canonical method for checking ufs file systems on a FreeBSD 7.1/amd64 system after an unscheduled power outage? How about fsck Right.

Re: recovering from a power outage

2009-02-12 Thread prad
On Thu, 12 Feb 2009 16:45:18 -0800 David Newman dnew...@networktest.com wrote: do I need to boot into single-user mode, what filesystem(s) do I mount and how, what switches if any do I use with fsck and so on. i thought it happens in the background anyway. i don't recall having to do anything

Re: recovering from a power outage

2009-02-12 Thread A. Wright
[ deletia introducing discussion of fsck ] On Thu, 12 Feb 2009, Tim Judd wrote: It's part of the bootup scripts now. It runs in the background 60 seconds after the login prompt shows up (not exactly, but close to 60 secs) it's the background_fsck option that defaults to YES in

Re: recovering from a power outage

2009-02-12 Thread Jamie
On Thu, 12 Feb 2009, David Newman wrote: On 2/12/09 4:41 PM, Jerry McAllister wrote: On Thu, Feb 12, 2009 at 04:06:49PM -0800, David Newman wrote: What's the canonical method for checking ufs file systems on a FreeBSD 7.1/amd64 system after an unscheduled power outage? How about fsck

Re: recovering from a power outage

2009-02-12 Thread Jerry McAllister
On Thu, Feb 12, 2009 at 05:16:53PM -0800, prad wrote: On Thu, 12 Feb 2009 16:45:18 -0800 David Newman dnew...@networktest.com wrote: do I need to boot into single-user mode, what filesystem(s) do I mount and how, what switches if any do I use with fsck and so on. i thought it happens

Re: recovering from a power outage

2009-02-12 Thread Robert Huff
Jerry McAllister writes: do I need to boot into single-user mode, what filesystem(s) do I mount and how, what switches if any do I use with fsck and so on. i thought it happens in the background anyway. i don't recall having to do anything other than listen to the drive

Re: recovering from a power outage

2009-02-12 Thread Bill Moran
David Newman dnew...@networktest.com wrote: What's the canonical method for checking ufs file systems on a FreeBSD 7.1/amd64 system after an unscheduled power outage? Wait. The system will automatically detect a dirty shutdown and check the disks during the boot process. If the disks are