On Monday July 10, [EMAIL PROTECTED] wrote:
> Karl Voit wrote:
> [snip]
> > Well this is because of the false(?) superblocks of sda-sdd in comparison to
> > sda1 to sdd1.
> 
> I don't understand this. Do you have more than a single partion on sda?
> Is sda1 occupying the entire disk? since the superblock is the /last/
> "128Kb" (I'm assuming 128*1024 bytes) the superblocks should be one and
> the same.

Not exactly.
The superblock locations for sda and sda1 can only be 'one and the
same' if sda1 is at an offset in sda which is a multiple of 64K, and
if sda1 ends near the end of sda.  This certainly can happen, but it
is by no means certain.

For this reason, version-1 superblocks record the offset of the
superblock in the device so that if a superblock is written to sda1
and then read from sda, it will look wrong (wrong offset) and so will
be ignored (no valid superblock here).

NeilBrown
-
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Reply via email to