[SPARCbook] I need help

[Bit Iron]

 Hi,
 I have a Sparcbook 3GX and I have a problem, my
 computer doesn't boot(my disk is configuring for scsi
3), it display this:
 Boot device:
 /iommu/sbus/espdma at 4,8400000/esp at 4,8800000/sd at 1,0
 File and args:
 Can't open boot device
 Type help for more information
 ok
 What can I do for boot the system ? , thanks for your
help
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