Sun Fire V65x Server with external scsi unit will not boot

Hi:

I have a Sun Fire V65x Server installed with redhat 9.0, (krud) which 
works ok, I have installed an external box with a disk an a tape.
When I connect the external device, it starts booting but it gets 
messed, it cannot find swap partition, it looks for it on the wrong 
drive. I supose I have to configure properly  the scsi subsystem, but 
dont know what exactly.

When the system says "Cannot memory map device" should I change also 
scsi configuration?

Thank you
Adam

this is what dmesg says about it:

SCSI subsystem driver Revision: 1.00
aic79xx: PCI4:7:1 MEM region 0x0 unavailable. Cannot memory map device.
nvram_scb == 0xfe
SCBPTR == 0xff
Signature = BIOS
aic79xx: PCI4:7:0 MEM region 0x0 unavailable. Cannot memory map device.
nvram_scb == 0xfe
SCBPTR == 0xff
Signature = BIOS
scsi0 : Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev 1.0.0
         <Adaptec aic7902 Ultra320 SCSI adapter>
         aic7902: Ultra320 WideChannel A, SCSI Id=7, PCI-X 67-100Mhz, 
512 SCBs

scsi1 : Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev 1.0.0
         <Adaptec aic7902 Ultra320 SCSI adapter>
         aic7902: Ultra320 WideChannel B, SCSI Id=7, PCI-X 67-100Mhz, 
512 SCBs

   Vendor: SEAGATE   Model: ST336607LSUN36G   Rev: 0307
   Type:   Direct-Access                      ANSI SCSI revision: 03
   Vendor: SEAGATE   Model: ST336607LSUN36G   Rev: 0307
   Type:   Direct-Access                      ANSI SCSI revision: 03
   Vendor: ESG-SHV   Model: SCA HSBP M16      Rev: 0.05
   Type:   Processor                          ANSI SCSI revision: 02
scsi1:A:0:0: Tagged Queuing enabled.  Depth 32
scsi1:A:1:0: Tagged Queuing enabled.  Depth 32
Attached scsi disk sda at scsi1, channel 0, id 0, lun 0
Attached scsi disk sdb at scsi1, channel 0, id 1, lun 0
(scsi1:A:0): 320.000MB/s transfers (160.000MHz DT, offset 63, 16bit)
(scsi1:A:0:0): Now packetized.
SCSI device sda: 71132959 512-byte hdwr sectors (36420 MB)
Partition check:
  sda: sda1 sda2 sda3
(scsi1:A:1): 320.000MB/s transfers (160.000MHz DT, offset 63, 16bit)
(scsi1:A:1:0): Now packetized.
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