CONTROL Mode Page - Which document should I read? spc-2 or scp-5?

Felipe Gutierrez felipe at
Tue Apr 21 07:08:06 PDT 2015

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Hi, I am new in SCSI commands, so I would like a help to see if I am
understanding well these messagens.
My first scenario is at windows and I am analyzing Mode Sense (6)
messagens. With wireshark I can see that the initiator (83) sends a message
Mode Sense(6) and the target (117) respond with a message Data In LUN (Mode
Sense (6) Respond Data) and after that there is another respond from the
target (117) Respond LUN (Mode Sense(6) Good), which means the target is
responding well to the initiator. I presume.... Is that right?
14724 38.244115000 50501 50501 iSCSI iscsi-target
102 SCSI:
Mode Sense(6) LUN: 0x00
14725 38.255535000 iscsi-target 3260 iSCSI 50501 126
Data In LUN: 0x00 (Mode Sense(6) Response Data)
14726 38.255616000 iscsi-target 3260 iSCSI 50501 102
Response LUN: 0x00 (Mode Sense(6)) (Good)
My second scenario is where I am trying to implement the code. I connect
from vmware initiator (61) ant it send a message Mode Sense(6) and the
target does not seem to respond. After that there is another message from
the initiator Read(10) LUN. Is the right?
43028 166.062627000 60209 60209 iSCSI
iscsi-target 114 SCSI:
Mode Sense(6) LUN: 0x13
53657 194.869915000 25713 25713 iSCSI
iscsi-target 114 SCSI:
Read(10) LUN: 0x13 (LBA: 0x00000000, Len: 1)
I am implementing the Mode Sense(6) - Control Mode Page as says spc5, but looking at
wireshark the SCSI CDB Mode Sense(6) says "..00 1010 = SPC-2 Page Code:
Control (0x0a)" SPC-2. I think it is why my implementation is not sending
the correct message to the initiator. Is that right?
looking at the I don't have access to this document ( If I am at the right path could please
anyone send to me this document?
And... if you have other tips that will help.
Thanks a lot.

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