El vie, 04-07-2008 a las 22:11 +0800, Bean escribió: > About the flags, no one can guarantee that the incompat bit would > result in an unreadable fs. The journal is a good example. Even with > journal enabled, we can read from it most of the time. The journal: EXT3_FEATURE_COMPAT_HAS_JOURNAL (R/W compatibility) The btree: EXT2_FEATURE_RO_COMPAT_BTREE_DIR (R/O compatibility) Can you grasp the difference between these back-compatible additions to the filesystem and incompatible changes that break readers like the EXT2_FEATURE_INCOMPAT_META_BG lazy inode writing I mentioner earlier?
> Note that the > /boot directory is rarely touched, and we sync twice when modifying > it. You may argue that there is still a chance of failure. Well, there > certainly is, but should we disable install to ext3 ? > No, because the journal flag has read-write compatibility: we are guaranteed to be able to mess with the FS with our current driver.
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