Thank Nigel,

Disabling jumbo and tso on win server allowed formatting to be done. SUN had 
unchanged config:

e1000g1: flags=1001000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4,FIXEDMTU> mtu 
9000 index 3
        inet 10.10.110.101 netmask ffffff00 broadcast 10.10.110.255
        ether 0:15:17:89:97:1 

I'm attaching traces from both sides during iscsi session: logon to target, 
online volume in Windows and do quick format.

For jumbo on mode I saw a warning while tracing on SUN:

snoop -r -d e1000g1 -o jambo_on_tso_off.cap 

Using device e1000g1 (promiscuous mode)
42817 (warning) packet length greater than MTU in buffer offset 0: length=26960
42819 (warning) packet length greater than MTU in buffer offset 27048: 
length=18000
42828 (warning) packet length greater than MTU in buffer offset 16728: 
length=27680
42830 (warning) packet length greater than MTU in buffer offset 44496: 
length=13728

File to download:
http://www.speedyshare.com/538479835.html

Careful, unpacked traces are big
--
Roman
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