[Dovecot] very slow imap opens in pine after moving maildirs to new drive

[Jakob Hirsch]

Dave Lugo wrote:

> users' imap maildirs was getting close to full.  So... last night, I
> used tar to copy /var/spool/imap to a new drive (9G scsi, reiserfs) that
> I then mounted under /var/spool/imap (after moving the old dir aside).

What was the old fs? I remember something in the reiserfs FAQ about bad
performance if you tar-copied from some other fs... ah, yes:
http://www.namesys.com/faq.html#file-ordering-speed