This is a Dell PV 760 (aka NetApp F760, fw 2.8_a2)
3 Dell 700 shelves with Ids 0, 1, 2 connected to isp2100 in slot 2

Crash log on console :
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Mon Dec 20 09:15:45 GMT [ispfc_init_1:error]: Device 2.0 (0x02000000) appears to have taken a soft address: expected hard address 7 (0xda), assigned soft address 0 (0xef).
Mon Dec 20 09:15:52 GMT [ispfc_init_1:error]: Device 2.0 (0x02000000) appears to have taken a soft address: expected hard address 7 (0xda), assigned soft address 0 (0xef).

ispfc: Fibre Channel adapter 0a appears to be unattached/disconnected.  If 
   adapter is in use, check cabling and seating of LRC cards in disk shelves.
Mon Dec 20 09:15:54 GMT [ispfc_init_0:error]: Initialization failed on Fibre Channel adapter 0a.

NetApp Release 6.4.5: Wed Jul 14 04:27:30 PDT 2004
Copyright (c) 1992-2004 Network Appliance, Inc.
Starting boot on Mon Dec 20 09:15:37 GMT 2004
Mon Dec 20 09:15:56 GMT [ispfc_timeout_1:error]: Invalidating disk device 2.0 (0x02000000) which appears to have taken a soft address, possibly due to conflicting shelf ids.
Mon Dec 20 09:15:58 GMT [net_e0:info]: Ethernet e0: Link up.
level1 pte is 1fa3400001101
level2 pte is 1fa3300001101
level3 pte is NULL
MM fault MMCSR=1, type=1, VA=0x0, PC=0xfffffc000060d4a0, RA=0xfffffc00004a9bc0

PANIC: MM fault MMCSR=1, type=1, VA=0x0, PC=0xfffffc000060d4a0, RA=0xfffffc00004a9bc0 in process ses_admin on release NetApp Release 6.4.5 on Mon Dec 20 09:16:00 GMT 2004

version: NetApp Release 6.4.5: Wed Jul 14 04:27:30 PDT 2004 cc flags: 1

DUMPCORE: START

DUMPCORE: END -- coredump *NOT* written.
halt after panic during system initialization

ok Killed
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It can boot sometimes, but some drives are missing after boot !!

I have nearly the same crash with shelves connected to internal fc-al
and fc card removed.

any idea ?

Thanks