Re: e2fs unstable on powerdown
Steven Jones napsal(a): convert ext2 to ext3 it is quite simple. I have had RS file systems loose iteasier then ext2...from power failures, I would advise ext3 it is very robust. OK, gonna getta tune2fs -j /dev/hda1 /etc/fstab : ext2 - ext3 /etc/default/rcS : FSCKFIX=no - FSCKFIX=yes I had a bit irrational fear about performance consequences of journaling - the machine is a bit outdated - P75 64RAM and goes 50% CPU now, but I have not the heart to give it the air :-) Your blaming a file system issue with a power failure, sorry its your power that is an issue, I have Solaris boxes, tru64 boxes and NTx boxes all get upset if they have frequent power failures, so ext2 and Linux is not at fault. It was not really blaming - I only wanted your advices how to proceed.. Get a UPS with a parachute system to shutdown your server. And/or if you know 99% of your power failures are 30 mins and only happen once a week then size the UPS to cope with a 1 hour outage with a recovery of 2 or 3 hours. Online UPSs are the best but cost the most and are usually OTT, unless your line in has severe sine wave and spike issues in which case an online ups is your only viable solution. I know - UPS would be the best solution, but the budget is extremely limited and powerdowns are not more frequent than 3x a year. The other trick is to look at a UPS with a big charging circuit but small batteries, ie one designed for expandibility) you can then add car batteries to it very cheaply to give massive capacity for at most the same cost as the dry cells that the UPS normally uses...ie keep the server up all day Really interestig... UPS tuning :) regards Steven aka thing Cheers David aka David -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: e2fs unstable on powerdown
On Tue, Nov 30, 2004 at 09:57:46AM +1300, Steven Jones wrote: -Snip- The other trick is to look at a UPS with a big charging circuit but small batteries, ie one designed for expandibility) you can then add car batteries to it very cheaply to give massive capacity for at most the same cost as the dry cells that the UPS normally uses...ie keep the server up all day Yes, but use camper bateries instead of car batteries, as they trade maks cold cranking amps for capacity (Amp hours) regards Steven aka thing -- Frode Haugsgjerd (who used to b work as car mechanicÂÂ) Norway -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
e2fs unstable on powerdown
Hi! I'm facing severe problems with e2fs on low-volume server with Postfix and NSD running. Every time the power goes off, the / is mounted ro (which is meaningful) and is a bit corrupted (10-20 files with 0 size, bad owners, completely lost etc.). I know, the best solution would be to buy the UPS, but is a such unstability common? I wouldn't be surprised in case of Raiser with cache enabled, but ext2 is known as a relative stable fs. Should I tune something or is the UPS the only way? Thanks for hints! With regards David -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: e2fs unstable on powerdown
On Mon, 2004-11-29 21:46:15 +0100, David Zejda [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]: Hi! I'm facing severe problems with e2fs on low-volume server with Postfix and NSD running. Every time the power goes off, the / is mounted ro (which is meaningful) and is a bit corrupted (10-20 files with 0 size, bad owners, completely lost etc.). I know, the best solution would be to buy the UPS, but is a such unstability common? I wouldn't be surprised Get real. If you rip off power from your computer, running an operating system that tries to *cache* things by using it's RAM, what do you expect? There's a lot of unwritten data in your computer's RAM, which isn't brought to stable storage on a power failure. in case of Raiser with cache enabled, but ext2 is known as a relative stable fs. Should I tune something or is the UPS the only way? Thanks for hints! ext2, as any other writeable filesystem not mounted in a synchronous, will just always somehow fail. Some very clever filesystems can minimize the effects, but just letting the power go away is a bad thing. If power failures are common at your site, mount the filesystem in synchronous mode (which is a *lot* slower) and/or start using ext3. This at least will keep the filesystem itself intact (but not neccessarily the file's contents). MfG, JBG -- Jan-Benedict Glaw [EMAIL PROTECTED]. +49-172-7608481 _ O _ Eine Freie Meinung in einem Freien Kopf| Gegen Zensur | Gegen Krieg _ _ O fuer einen Freien Staat voll Freier Bürger | im Internet! | im Irak! O O O ret = do_actions((curr | FREE_SPEECH) ~(NEW_COPYRIGHT_LAW | DRM | TCPA)); signature.asc Description: Digital signature
RE: e2fs unstable on powerdown
convert ext2 to ext3 it is quite simple. I have had RS file systems loose iteasier then ext2...from power failures, I would advise ext3 it is very robust. Your blaming a file system issue with a power failure, sorry its your power that is an issue, I have Solaris boxes, tru64 boxes and NTx boxes all get upset if they have frequent power failures, so ext2 and Linux is not at fault. Get a UPS with a parachute system to shutdown your server. And/or if you know 99% of your power failures are 30 mins and only happen once a week then size the UPS to cope with a 1 hour outage with a recovery of 2 or 3 hours. Online UPSs are the best but cost the most and are usually OTT, unless your line in has severe sine wave and spike issues in which case an online ups is your only viable solution. The other trick is to look at a UPS with a big charging circuit but small batteries, ie one designed for expandibility) you can then add car batteries to it very cheaply to give massive capacity for at most the same cost as the dry cells that the UPS normally uses...ie keep the server up all day regards Steven aka thing -Original Message- From: David Zejda [mailto:[EMAIL PROTECTED] Sent: Tuesday, 30 November 2004 9:46 a.m. To: Debian ISP Subject: e2fs unstable on powerdown Hi! I'm facing severe problems with e2fs on low-volume server with Postfix and NSD running. Every time the power goes off, the / is mounted ro (which is meaningful) and is a bit corrupted (10-20 files with 0 size, bad owners, completely lost etc.). I know, the best solution would be to buy the UPS, but is a such unstability common? I wouldn't be surprised in case of Raiser with cache enabled, but ext2 is known as a relative stable fs. Should I tune something or is the UPS the only way? Thanks for hints! With regards David -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
