Well, I guess I really have to live with that problem... Apps do not show any slowness. I work e.g. with Logic 7.1 that needs a lot of CPU power and everything is ok.
I'm asking myself if maybe my Western Digital Harddisk is not ok. The boot time problem exists since I installed Tiger - and this was the first time I used this disk as boot disk. On Panther I used the original Seagate drive that now is my second HD.
Problems with the Western Digital HD could also explain why the startup time from a firewire clone is faster. But how can I check my suggestion? Checking my disk with the Mac OS X Disk Utility (I don't know how it's named in English) I got no error - also when I use the Hardware Diagnosis CD that was delivered with my G5.
I'm a bit annoyed: I own one of the fastest G5 and spent a lot of money for it - and the startup time is much slower than on my PowerBook.
Ulf
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Mercedes-Benz W126 specifications