Messages in this thread | | | Date | Thu, 1 Apr 1999 21:42:33 +0200 | From | Pavel Machek <> | Subject | Re: Flaw in ext2? |
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Hi!
> > The version of the kernel that you have deletes the inode number from the directory when > > it deletes the file. This makes us lose the connection between the name and the data. > > So we have names and we have inodes which point to data but the connection between the 2 > > is lost. This version also deletes the indirect block. These are the blocks that point to > 63kb sections of the file. Once a file gets over 12 blocks long (about 6k) the system the > > system stores the address pointers on the disk. In indirect blocks. Each indirect block > > points to 64kb of data. Anyway these are also zeroed out. I know of no other unix that > > zeros the indirect blocks. Most of the unix recoveries I have done is where the system is > corrupted and wont mount. I have also done unixes that have been deleted and used the > > indirect blocks to recover vast amounts of data. I didn't realize that linux zeroed the > > indirect blocks. > > The worrisome part, of course, is the "I know of no other Unix that does > this." > > Could someone who is in the know please provide me with a source, > perhaps, for the answer to this question?
Something similar happened to our artax server.
2.0.0 clears indirect blocks. That is fixed in 2.2.X. Pavel -- I'm really pavel@atrey.karlin.mff.cuni.cz. Pavel Look at http://atrey.karlin.mff.cuni.cz/~pavel/ ;-).
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