[pca] Install in Single User Mode?

[Christophe Kalt]

On May 26, Martin Paul wrote:
| Romeo Theriault wrote:
| >First, Sun "strongly" recommends that the patch clusters be installed in 
| >single-user mode. Is it recommended to install the patches with pca in 
| >single-user mode? At least the ones that require a reboot to finish? Or 
| >is it safe to install them in multi-user mode but with just all the 
| >applications using the system turned off?
| 
| The recommendation/requirement to install in single user mode is a 
| per-patch property; the README of each patch will tell you whether it is 
| to be installed in single user mode or not. Quite often, patches which 
| require a reboot also are recommended to be installed in single user 
| mode, and vice versa.
| 
| How hard this recommendation/requirement is debatable. On one hand it's 
| Sun which says so, and they should know. On the other hand, people 
| (including me) have been installing all patches in multi-user mode for 
| years without problems.

i think this luxury may be ending.
Recent patch(es?) definitely had issues in multi-user mode
(usually because of NFS and/or lofs mounts).  Too early to
tell whether these were odd balls, but i doubt it.