Date: Tue, 20 Jan 2004 00:31:30 +0100 From: Peter Schuller <peter.schuller@infidyne.com> To: <freebsd-questions@freebsd.org> Subject: Unexpected soft update inconsistency Message-ID: <200401200031.31026.peter.schuller@infidyne.com>
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Hello, What's the deal with soft updates and guaranteed consistency? Every time journaling is brought up by someone, he/she is promptly told about how soft updates does the job at least as well. I never had a problem with this based on what I have read about soft updates. However: I *very* quickly ran into a case where I got an "unexpected soft update inconsistency" after crashing the machine by doing something naughty with Vinum while there was disk activity (note: the filesystem which exhibited the problem was not on a vinum volume). So my question is: Do soft updates, or do they not, algorithmically guarantee filesystem meta-data consistency in the event of a crash? or to put it another way: Was this an implementation bug or a fact of life with soft updates? Thanks, -- / Peter Schuller, InfiDyne Technologies HB PGP userID: 0xE9758B7D or 'Peter Schuller <peter.schuller@infidyne.com>' Key retrieval: Send an E-Mail to getpgpkey@scode.org E-Mail: peter.schuller@infidyne.com Web: http://www.scode.org
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