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Hi  Alex,

> Please try the mysql5 packages in /testing again.

I did and it looks good. I did a fresh install without existing DBs. It
created /opt/csw/mysql5/var/mysql, registered and started the service
via SMF.

I noticed one typo in postinstall:
  MySQL 4 is initialized for a small memory footprint.
That should be "MySQL 5". ;-)

I did not try MySQL 4 and MySQL 5 together.

Regards,
Markus

PS: Sample output:

[...]
Installing class <smfyes>.
/opt/csw/lib/svc/method/svc-mysql5
/opt/csw/var/svc/manifest/network/mysql5.xml
[ verifying class <smfyes> ]
## Executing postinstall script.
Creating default data directory /opt/csw/mysql5/var
MySQL 4 is initialized for a small memory footprint.
PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
To do so, issue the following commands: ($bindir is /opt/csw/mysql5/bin)
$bindir/mysqladmin -u root password 'new-password'
$bindir/mysqladmin -u root -h  password 'new-password'
See the manual for more instructions and use of my.cnf.
Configuring service in SMF
MySQL 5 is using Service Management Facility.  The FMRI is:
  svc:network/cswmysql5:default
Starting mysql5

Installation of <CSWmysql5> was successful.