Even new hardware doesn't last forever. An hard disk in the raid-5 array broke. The disk still works, but after a few days it just stops. the complete array is frozen, a reset of the machine makes it working again. A new (well, almost new) disk (Seagate Cheetah 18,2GB-SCSI-WU3-10K-SCA-1inch) from Proliantonderdelen (the website http://proliantonderdelen.nl is gone) is the replacement (leftside at picture)

The machine is relocated and has been offline for almost two hours.