proy's questions

I have set up a RAID5 array using 4 disk partition. All disks are 2TB. When the RAID5 array was initially syncing it was too slow. So I did a

echo 32768 > /sys/block/md2/md/stripe_cache_size

and then it was quiet fast. But still it took a days time to finish syncing. Now I want am doing a

dd if=/dev/zero of=/dev/md2 bs=1024k

onto the RAID5 array and it is like a day over and yet it has not finished. Will this take too much time am I doing some thing wrong.

My raid details are here http://dpaste.com/749742/
Iostat details here http://dpaste.com/749761/ hdd partitioning details here http://dpaste.com/749765/

I have an identical machine with the similar details. But that's quiet faster.

UPDATE: I have added my hdd partitioning details.

I want to do something like this

unison 192.168.1.1:/data/<example directory> /data/server_backup

There is a space in the source directory. Is there some way I can do this with out using "\"

I have a postfix + virtual users setup. I have enabled maildrop as the delivery agent. How can I write a filter for a user so that if mail comes from a particular domain to that user a copy also goes to another email address.

I have a mail server for a domain foo.com. Currently all users mail box is also in the same server. Now this company is starting its operation in multiple Countries. How can I have mailbox store of the users in one country to be stored locally in a server in that country office server. My current setup is a combination of Postfix + Courier IMAP + MySQL + Amavisd-new + SpamAssassin + ClamAV + SASL . Basically what I need is user A's mails should go to the server in Country A and user B's mails should go to the server in Country B. If my question is not clear enough I am open to questions. One main thing here is the domain name should be the same for all users.