On Fri, 27 Jan 2006 08:10:58 +0100 Sven Luther <Sven Luther <[EMAIL PROTECTED]>> wrote:
| I don't like this, it is indeed in line with Andrew's way of doing stuff, and
| helps with recovery, but i believe also somewhat error prone.
Why? Where do you see the possibility of error?
Look at this:
- we mistakenly calculate the wrong block size
- there is always the right one, so we have two blocksize possibilities
- always fall back to partition table when there are two possiblities
- problem fixed
| How can you check the possible ends ? I am not all that familiar with block
| endings though.
Example for an affs with bs=1024 on a hdd with bs=512:
1. check if bs=512:
- read 512/512=1 sectors into buf
- check whether the aforementioned conditions are true for buf
-> they shouldn't be, so the bs is not 512
2. check if bs=1024:
- read 1024/512=2 sectors into buf
- check whether the aforementioned conditions are true for buf
-> they will definitely be, so the bs is 1024
3. check if bs=2048:
[...]
4. check if bs=4096:
[...]
last step: check whether this algorithm found multiple block sizes.
if yes, fall back to partition table.
Let me know of more things unclear.
Best wishes,
Leslie
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