I'm having the same problem after adding 2 SSD disks to my machine.
The controller is LSI SAS9211-8i PCI Express.

# format
Searching for disks...Arithmetic Exception (core dumped)



# pstack core.format.1016
core 'core.format.1016' of 1016:        format
 fee62e4a UDiv     (4, 0, 8046bf0, 8046910, 80469a0, 80469c0) + 2a
 08079799 auto_sense (4, 0, 8046bf0, 1c8) + 281
 080751a6 add_device_to_disklist (8047930, 8047530, feffb8f4, 804716c) + 62a
 080746ff do_search (0, 1, 8047d98, 8066576) + 273
 0806658d main     (1, 8047dd0, 8047dd8, 8047d8c) + c1
 0805774d _start   (1, 8047e88, 0, 8047e8f, 8047e99, 8047ead) + 7d


I'm on b147.

# uname -a
SunOS geneva5 5.11 oi_147 i86pc i386 i86pc Solaris


On Tue, Nov 2, 2010 at 7:17 AM, Joerg Schilling
<joerg.schill...@fokus.fraunhofer.de> wrote:
> Roy Sigurd Karlsbakk <r...@karlsbakk.net> wrote:
>
>> Hi all
>>
>> (crossposting to zfs-discuss)
>>
>> This error also seems to occur on osol 134. Any idea what this might be?
>>
>> > ioctl(4, USCSICMD, 0x08046910) = 0
>> > ioctl(4, USCSICMD, 0x08046900) = 0
>> > ioctl(4, USCSICMD, 0x08046570) = 0
>> > ioctl(4, USCSICMD, 0x08046570) = 0
>> > Incurred fault #8, FLTIZDIV %pc = 0xFEE62E4A
>> > siginfo: SIGFPE FPE_INTDIV addr=0xFEE62E4A
>> > Received signal #8, SIGFPE [default]
>> > siginfo: SIGFPE FPE_INTDIV addr=0xFEE62E4A
>> > r...@tos-backup:~#
>
> You need to find out at which source line the integer division by zero occurs.
>
> Jörg
>
> --
>  EMail:jo...@schily.isdn.cs.tu-berlin.de (home) Jörg Schilling D-13353 Berlin
>       j...@cs.tu-berlin.de                (uni)
>       joerg.schill...@fokus.fraunhofer.de (work) Blog: 
> http://schily.blogspot.com/
>  URL:  http://cdrecord.berlios.de/private/ ftp://ftp.berlios.de/pub/schily
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