Re: [reiserfs-list] O/T but expert answer needed: MS says NTFS does full data journaling
On Thu, 14 Feb 2002 20:25, Paul Robertson wrote: > > When a maching gets an Oops or BSOD condition then the kernel is > > inherantly > > > doing improper and unpredictable things with memory. Therefore > > regardless > > of > > > what file system you use it could get trashed and data could get lost. > > > > Oops conditions are generally rare on Linux machines so this shouldn't be > > much of an issue. BSOD on NT is quite common... > > IMO oops and BSOD are quite different. There are many possible reasons why > an NT kernel component might decide to call KeBugCheck() which generates > the BSOD. I have a book which lists around 100 "common" bugcheck codes. In > particular, NT can be configured to dump the system state to a file on the > boot partition when a crash occurs. There are also a couple of Linux kernel patches to support dumping the memory to the swap partition on an Oops, and an Oops can be triggered by any condition that some kernel code considers Oops-worthy. IMHO The biggest difference between an Oops and a BSOD is that a machine doesn't totally die after an Oops (which can be considered a good or a bad thing). -- http://www.coker.com.au/bonnie++/ Bonnie++ hard drive benchmark http://www.coker.com.au/postal/ Postal SMTP/POP benchmark http://www.coker.com.au/projects.html Projects I am working on http://www.coker.com.au/~russell/ My home page
Re: [reiserfs-list] O/T but expert answer needed: MS says NTFS does full data journaling
> On Thu, 14 Feb 2002 02:58, [EMAIL PROTECTED] wrote: > > On Wed, 13 Feb 2002 12:26:59 +1300, Adam Warner <[EMAIL PROTECTED]> > said: > > >Does Windows journal the metadata, data or both? > > > > > >Answer: Windows NT/2000 systems that utilize NTFS since NT3.1 have > > >always journalled and logged metadata and data, so we've been doing > > >this for close to a decade. > > > > > > I just want to confirm if this is in fact true. I can't find a > > > > Hint: If they journal both, why do you ever hear of people getting > > corrupted filesystems when the box BSOD's? > > > > (No, I don't know if it does or not - but I've heard *too* many people say > > "It hosed the disk and I had to reinstall" for me to think that it's done > > correctly) > > When a maching gets an Oops or BSOD condition then the kernel is inherantly > doing improper and unpredictable things with memory. Therefore regardless of > what file system you use it could get trashed and data could get lost. > > Oops conditions are generally rare on Linux machines so this shouldn't be > much of an issue. BSOD on NT is quite common... > > -- > http://www.coker.com.au/bonnie++/ Bonnie++ hard drive benchmark > http://www.coker.com.au/postal/ Postal SMTP/POP benchmark > http://www.coker.com.au/projects.html Projects I am working on > http://www.coker.com.au/~russell/ My home page IMO oops and BSOD are quite different. There are many possible reasons why an NT kernel component might decide to call KeBugCheck() which generates the BSOD. I have a book which lists around 100 "common" bugcheck codes. In particular, NT can be configured to dump the system state to a file on the boot partition when a crash occurs. -- Paul Robertson
Re: [reiserfs-list] O/T but expert answer needed: MS says NTFS does full data journaling
On Thu, 14 Feb 2002 02:58, [EMAIL PROTECTED] wrote: > On Wed, 13 Feb 2002 12:26:59 +1300, Adam Warner <[EMAIL PROTECTED]> said: > >Does Windows journal the metadata, data or both? > > > >Answer: Windows NT/2000 systems that utilize NTFS since NT3.1 have > >always journalled and logged metadata and data, so we've been doing > >this for close to a decade. > > > > I just want to confirm if this is in fact true. I can't find a > > Hint: If they journal both, why do you ever hear of people getting > corrupted filesystems when the box BSOD's? > > (No, I don't know if it does or not - but I've heard *too* many people say > "It hosed the disk and I had to reinstall" for me to think that it's done > correctly) When a maching gets an Oops or BSOD condition then the kernel is inherantly doing improper and unpredictable things with memory. Therefore regardless of what file system you use it could get trashed and data could get lost. Oops conditions are generally rare on Linux machines so this shouldn't be much of an issue. BSOD on NT is quite common... -- http://www.coker.com.au/bonnie++/ Bonnie++ hard drive benchmark http://www.coker.com.au/postal/ Postal SMTP/POP benchmark http://www.coker.com.au/projects.html Projects I am working on http://www.coker.com.au/~russell/ My home page
