IBM HD powerdown

[John2B]

Problem:
When working a error occurred whit popup from the Escalade RAID Card:

Error: Port 0 unexpected power down IBM harddisk 0,

The disk is still working, and visible, so I think there was a temporarily powerdown..?
Even the fact that this harddisk is the last one on this powercable, I suppose there shoot be power enough.

Do someone have some suggestions what the problem it good be, or what is shoot check or do.??

You can put answers in Dutch to!!!

Configuration:

Computer housing AOPEN HQ08 with 300watt power supply,
ASUS CUSLE 2C Motherboard no soundcard onboard
Intel pentium III 1000Mhz processor
512Mb Sdram Cas2
Adaptec SCSI Card Ultra 2940AU
Yamaha SCSI CD Recorder 6410
Nikon Coolscan II
Epson Color Photo Printer
Asus DVD Player
Sony diskette station
AGP Matrox Marvel G450 TV AGP
PCI Matrox Marvel TV in and out
PCI Soundblaster live 5.1
PCI 3Ware Escalade 6410 IDE RAID Controller with 4 IDE controllers RAID 0,1,5 or10
PCI 3Com 10/100mb EthernetCard
PCI LT Modem
3x IBM Harddisk DTLA 307030
2x IBM Harddisk IC35L040AVER07

RAID Configuration RAID 10,
2xDTLA307030 Stripeset and mirror 1xDTLA30703, 1x IC35L040AVER07

on IDE from motherboard 1xIBM IC35L040AVER07