Paper reading homework

In preparation for lecture, first read the paper Journaling the Linux ext2fs Filesystem. You may find it helpful to refer to our FAQ for this paper.

The paper uses "journal" to refer to the same idea that xv6 calls a "log". The file system described in the paper is now called ext3.

Mid-way down the left column on page 6, the Journaling paper says "However, until we have finished syncing those buffers, we cannot delete the copy of the data in the journal". What is a concrete example in which removing this rule would lead to disaster?

Submit your answer in an ASCII text file named homework.txt to the corresponding "Lecture N" assignment on Gradescope.

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