MDC can potentially cause problems with any journaling filesystem. I think that VM would have to crash for it to actually cause corruption.
-----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of Ranga Nathan Sent: Tuesday, June 14, 2005 11:17 AM To: [email protected] Subject: Re: reiserfs file system corruption I got a quick response from SuSE. Here is what they say: You shouldn't see any file corruption at all. Does this happen on an MDISK on z/VM, by any chance? In this case please turn off MDISK caching. Another common cause for seemingly unexplainable corruptions is if you assign more than 2 GB of RAM to a 31-bit mode Linux system the kernel I/O behaves erratically. If I turn MDC off, I need to bump up Linux memory as it would need to do some caching. I like my Linux machines run lean. Are there similar issues with other file systems? Is there a performance hit in turning MDC off? __________________________________________ Ranga Nathan / CSG Systems Programmer - Specialist; Technical Services; BAX Global Inc. Irvine-California Tel: 714-442-7591 Fax: 714-442-2840 "Fargusson.Alan" <[EMAIL PROTECTED]> Sent by: Linux on 390 Port <[email protected]> 06/14/2005 08:20 AM Please respond to Linux on 390 Port <[email protected]> To [email protected] cc Subject Re: reiserfs file system corruption When you say re-format I suspect you mean that you did actually re-format. You could have fixed this with a mkfs. I am a little surprised that fsck didn't fix the problem. That sounds like a bug. You didn't say if you are using a supported distribution or something else. I assume that you don't have support or you would have reported this to the vendor. You should probably report this to the reiserfs folks, or at least send something to the Linux Kernel Mail List. I tend to shy away from reiserfs since I have noticed that a large number of bugs have been reported on the Linux Kernel Mail List relative to the other filesystems. -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of Ranga Nathan Sent: Monday, June 13, 2005 5:37 PM To: [email protected] Subject: reiserfs file system corruption Some of our partitions using reiserfs are showing a large amount of file corruptions ... like below. I could not fix it using --fix-fixable or even --rebuild-tree. I even copied the data using cp-ax and copied back. Same result. I had to re-format the partition and copy back the data. Is this the only way to fix reiserfs partitions? I am not sure why the --fix-fixable and --rebuild-tree dont work. bad_stat_data: The objectid (1946160282) is marked free, but used by an object [1946160279 1946160282 0x0 SD (0)] bad_stat_data: The objectid (1946160283) is marked free, but used by an object [1946160279 1946160283 0x0 SD (0)] bad_stat_data: The objectid (1946160284) is marked free, but used by an object [1946160279 1946160284 0x0 SD (0)] finished Comparing bitmaps..finished Checking Semantic tree: finished 4312 found corruptions can be fixed when running with --fix-fixable ########### reiserfsck finished at Mon Jun 13 16:54:48 2005 ########### __________________________________________ Ranga Nathan / CSG Systems Programmer - Specialist; Technical Services; BAX Global Inc. Irvine-California Tel: 714-442-7591 Fax: 714-442-2840 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
