Messages in this thread | | | Date | Fri, 12 Sep 2003 00:50:08 +0200 | From | Rogier Wolff <> | Subject | Re: Reiser3/4 & Ext2/3 was: First impressions of reiserfs4 |
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On Thu, Sep 11, 2003 at 09:27:40PM +0400, Oleg Drokin wrote: > > > as are superblock, journal and journal header. > > How many superblocks are there in reiser3? Also, the bitmap locations are > > One superblock.
As we've experienced that it's possible to lose the one-and-only superblock, I would recommend that you build a backup superblock in the future. Of course you're going to argue that some parameters constantly change in the superblock so that it would mean a performance penalty to have two of them. Well, the backup superblock should be marked and used as such: It will allow a more "easy" recovery of the filesystem parameters, should the primary be "gone", but it should not interfere with "normal operation". So, feel free to only update it once every ten minutes or so. Or just initialize it and only write it when the fs is unmouted. Or don't update it at all. But no backup superblock, is just plain wrong.
Roger.
-- ** R.E.Wolff@BitWizard.nl ** http://www.BitWizard.nl/ ** +31-15-2600998 ** *-- BitWizard writes Linux device drivers for any device you may have! --* **** "Linux is like a wigwam - no windows, no gates, apache inside!" **** - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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