Q: How does raid1 sync if superblocks are dirty?

Hi,

I have oberserved a little bit obscure behavior of my RAID setup if my
system 
comes up after a reset. I have setup a mirror and if I start the RAID after
a 
reset MD detects that the superblocks on the disks are not clean and starts
a 
resync.

If I check the output MD tells me that both disks of the mirror are
operational;
the same if I look at the output of /proc/mdstat: both disks are operational

"... [2/2] [UU] ...". But a resync is still in progress.

My question is: In which direction the resync is done; resp. what is the
sync algorithm in that case?

The kernel version is 2.4.10 (md driver 0.90.0).

regards, Kay

######################################################
# Kay Potthoff              Senior Software Engineer
#
# FORCE Computers GmbH        Tel.: +49-89-60814-356
# Lilienthalstrasse 15        FAX : +49-89-6097793
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# Deutschland/Germany
#
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