Analyis of GlobalSAN iscsi Initiator trying
to connect to the OpenSolaris iscsi target
by
Nigel Smith
http://www.nwsmith.net/solaris/
http://nwsmith.blogspot.com/

:---------------------------------------:

GlobalSAN Initiator is 192.168.1.5    
Solaris Target is 192.168.1.1

### Initiator Login (packet #6)

SessionType=Normal
InitialR2T=No
HeaderDigest=None
DataDigest=None
MaxConnections=1
ImmediateData=Yes
MaxOutstandingR2T=4
DataPDUInOrder=Yes
DataSequenceInOrder=Yes
ErrorRecoveryLevel=0.TargetName=iqn.1986-03.com.sun:02:15665ce1-a3a0-e5bd-e9dd-d78783dec173.media
InitiatorName=iqn.2005-03.com.studionetworksolutions:mac-1093623522

### Target Response - Success (packet #8+9+10)

InitialR2T=Yes
HeaderDigest=None
DataDigest=None
MaxConnections=1
ImmediateData=Yes
MaxOutstandingR2T=4
DataPDUInOrder=Yes
DataSequenceInOrder=Yes
ErrorRecoveryLevel=0
TargetAlias=media
TargetPortalGroupTag=1

Init->Tgt (packet#14)    SCSI: Test Unit Ready LUN: 0x00
Tgt->Init (packet#16)    SCSI: Response LUN: 0x00 (Good)

Init->Tgt (packet#19)    SCSI: Inquiry LUN: 0x00 - (EVPD=0, Allocation Length=6)
Tgt->Init (packet#20-23) SCSI: Data In LUN: 0x00 (Inquiry Response) SCSI: Response LUN: 0x00 (Good)
Init->Tgt (packet#27)    SCSI: Inquiry LUN: 0x00 - (EVPD=0, Allocation Length: 49)
Tgt->Init (packet#28-30) SCSI: Data In LUN: 0x00 (Inquiry Response) SCSI: Response LUN: 0x00 (Good)

Init->Tgt (packet#35)    SCSI: Inquiry LUN: 0x00 - (EVPD=1 & Page Code 0x00, Allocation Length=4)
Tgt->Init (packet#36-37) SCSI: Data In LUN: 0x00 (Inquiry Response) SCSI: Response LUN: 0x00 (Good)
Init->Tgt (packet#41)    SCSI: Inquiry LUN: 0x00 - (EVPD=1 & Page Code 0x00, Allocation Length: 8)
Tgt->Init (packet#42-43) SCSI: Data In LUN: 0x00 (Inquiry Response) SCSI: Response LUN: 0x00 (Good)

Init->Tgt (packet#47)    SCSI: Inquiry LUN: 0x00 - (EVPD=1 & Page Code 0x80, Allocation Length=4)
Tgt->Init (packet#48-49) SCSI: Data In LUN: 0x00 (Inquiry Response) SCSI: Response LUN: 0x00 (Good)
Init->Tgt (packet#53)    SCSI: Inquiry LUN: 0x00 - (EVPD=1 & Page Code 0x80, Allocation Length: 8)
Tgt->Init (packet#54-55) SCSI: Data In LUN: 0x00 (Inquiry Response) SCSI: Response LUN: 0x00 (Good)

Init->Tgt (packet#59)    SCSI: Inquiry LUN: 0x00 - (EVPD=1 & Page Code 0x83, Allocation Length=4)
Tgt->Init (packet#60-61) SCSI: Data In LUN: 0x00 (Inquiry Response) SCSI: Response LUN: 0x00 (Good)
Init->Tgt (packet#65)    SCSI: Inquiry LUN: 0x00 - (EVPD=1 & Page Code 0x83, Allocation Length: 152)
Tgt->Init (packet#66-67) SCSI: Data In LUN: 0x00 (Inquiry Response) SCSI: Response LUN: 0x00 (Good)

{Now, for some unknown reason, it repeats those inquiries!}

Init->Tgt (packet#71)    SCSI: Test Unit Ready LUN: 0x00
Tgt->Init (packet#72)    SCSI: Response LUN: 0x00 (Good)

Init->Tgt (packet#75)    SCSI: Inquiry LUN: 0x00 - (EVPD=1 & Page Code 0x00, Allocation Length=4)
Tgt->Init (packet#76-77) SCSI: Data In LUN: 0x00 (Inquiry Response) SCSI: Response LUN: 0x00 (Good)
Init->Tgt (packet#81)    SCSI: Inquiry LUN: 0x00 - (EVPD=1 & Page Code 0x00, Allocation Length: 8)
Tgt->Init (packet#82-83) SCSI: Data In LUN: 0x00 (Inquiry Response) SCSI: Response LUN: 0x00 (Good)

Init->Tgt (packet#87)    SCSI: Inquiry LUN: 0x00 - (EVPD=1 & Page Code 0x80, Allocation Length=4)
Tgt->Init (packet#88-89) SCSI: Data In LUN: 0x00 (Inquiry Response) SCSI: Response LUN: 0x00 (Good)
Init->Tgt (packet#92)    SCSI: Inquiry LUN: 0x00 - (EVPD=1 & Page Code 0x80, Allocation Length: 8)
Tgt->Init (packet#93-94) SCSI: Data In LUN: 0x00 (Inquiry Response) SCSI: Response LUN: 0x00 (Good)

Init->Tgt (packet#98)     SCSI: Inquiry LUN: 0x00 - (EVPD=1 & Page Code 0x83, Allocation Length=4)
Tgt->Init (packet#99-100) SCSI: Data In LUN: 0x00 (Inquiry Response) SCSI: Response LUN: 0x00 (Good)
Init->Tgt (packet#103)    SCSI: Inquiry LUN: 0x00 - (EVPD=1 & Page Code 0x83, Allocation Length: 152)
Tgt->Init (packet#104-105)SCSI: Data In LUN: 0x00 (Inquiry Response) SCSI: Response LUN: 0x00 (Good)

{Then it does the EVPD=0 inquiry again!}

Init->Tgt (packet#103)    SCSI: Test Unit Ready LUN: 0x00
Tgt->Init (packet#104)    SCSI: Response LUN: 0x00 (Good)

Init->Tgt (packet#113)    SCSI: Inquiry LUN: 0x00 - (EVPD=0, Allocation Length=36)
Tgt->Init (packet#114-115)SCSI: Data In LUN: 0x00 (Inquiry Response) SCSI: Response LUN: 0x00 (Good)

Init->Tgt (packet#119)    SCSI: Report LUNs LUN: 0x00 - (Select All LUNs, Allocation Length=16)
Tgt->Init (packet#120-121)SCSI: Data In LUN: 0x00 (Report LUNs Response) SCSI: Response LUN: 0x00 (Good)

Init->Tgt (packet#124)    SCSI: Report LUNs LUN: 0x00 - (Select All LUNs, Allocation Length=16)
Tgt->Init (packet#125-126)SCSI: Data In LUN: 0x00 (Report LUNs Response) SCSI: Response LUN: 0x00 (Good)

{Then again it repeats things it has already done!}

Init->Tgt (packet#129)    SCSI: Inquiry LUN: 0x00 - (EVPD=1 & Page Code 0x83, Allocation Length=4)
Tgt->Init (packet#130-131)SCSI: Data In LUN: 0x00 (Inquiry Response) SCSI: Response LUN: 0x00 (Good)
Init->Tgt (packet#134)    SCSI: Inquiry LUN: 0x00 - (EVPD=1 & Page Code 0x83, Allocation Length: 152)
Tgt->Init (packet#135-136)SCSI: Data In LUN: 0x00 (Inquiry Response) SCSI: Response LUN: 0x00 (Good)

Init->Tgt (packet#139)    SCSI: Test Unit Ready LUN: 0x00
Tgt->Init (packet#140)    SCSI: Response LUN: 0x00 (Good)

Init->Tgt (packet#143)    SCSI: Inquiry LUN: 0x00 - (EVPD=0, Allocation Length=36)
Tgt->Init (packet#144-145)SCSI: Data In LUN: 0x00 (Inquiry Response) SCSI: Response LUN: 0x00 (Good)

Init->Tgt (packet#149)    SCSI: Mode Sense(6) LUN: 0x00 - (SBC-2 Page Code 0x08 [Caching], Allocation Length=4)
Tgt->Init (packet#150-151)SCSI: Data In LUN: 0x00 (Mode Sense(6) Response)
Init->Tgt (packet#155)    SCSI: Mode Sense(6) LUN: 0x00 - (SBC-2 Page Code 0x08 [Caching], Allocation Length=32)
Tgt->Init (packet#156-157)SCSI: Data In LUN: 0x00 (Mode Sense(6) Response)

{And again..}

Init->Tgt (packet#161)    SCSI: Mode Sense(6) LUN: 0x00 - (SBC-2 Page Code 0x08 [Caching], Allocation Length=4)
Tgt->Init (packet#162-163)SCSI: Data In LUN: 0x00 (Mode Sense(6) Response)
Init->Tgt (packet#167)    SCSI: Mode Sense(6) LUN: 0x00 - (SBC-2 Page Code 0x08 [Caching], Allocation Length=32)
Tgt->Init (packet#168-169)SCSI: Data In LUN: 0x00 (Mode Sense(6) Response)

Init->Tgt (packet#173)    SCSI: Mode Select(6) LUN: 0x00 SCSI: Data Out LUN: 0x00 (Mode Select(6) Request) 
Tgt->Init (packet#174-176)SCSI Response (Check Condition)

Init->Tgt (packet#181)    SCSI: Test Unit Ready LUN: 0x00
Tgt->Init (packet#182)    SCSI: Response LUN: 0x00 (Good)

Init->Tgt (packet#185)    SCSI: SCSI: Read Capacity(10) LUN: 0x00
Tgt->Init (packet#186-187)SCSI: Data In LUN: 0x00 (Read Capacity(10) Response)

Init->Tgt (packet#191)    SCSI: Mode Sense(10) LUN: 0x00  - (DBD=8, SBC-2 Page Code 0x03 [Format Device], Allocation Length=8)
Tgt->Init (packet#192-194)SCSI Response (Check Condition)
Init->Tgt (packet#199)    SCSI: Mode Sense(10) LUN: 0x00  - (DBD=0, SBC-2 Page Code 0x03 [Format Device], Allocation Length=8)
Tgt->Init (packet#200-202)SCSI Response (Check Condition)

Init->Tgt (packet#207)    SCSI: Mode Sense(6) LUN: 0x00 - (DBD=8, SBC-2 Page Code 0x03 [Format Device], Allocation Length=8)
Tgt->Init (packet#208-209)SCSI: Data In LUN: 0x00 (Mode Sense(6) Response)
Init->Tgt (packet#213)    SCSI: Mode Sense(6) LUN: 0x00 - (DBD=8, SBC-2 Page Code 0x03 [Format Device], Allocation Length=28)
Tgt->Init (packet#214-215)SCSI: Data In LUN: 0x00 (Mode Sense(6) Response)

Init->Tgt (packet#219)    SCSI: Mode Sense(6) LUN: 0x00  - (DBD=8,SBC-2 Page Code 0x04 [Rigid Disk Geometry], Allocation Length=8)
Tgt->Init (packet#220-221)SCSI: Data In LUN: 0x00 (Mode Sense(6) Response)
Init->Tgt (packet#225)    SCSI: Mode Sense(6) LUN: 0x00  - (DBD=8,SBC-2 Page Code 0x04 [Rigid Disk Geometry], Allocation Length=28)
Tgt->Init (packet#226-227)SCSI: Data In LUN: 0x00 (Mode Sense(6) Response)

Init->Tgt (packet#231)    SCSI: Mode Sense(6) LUN: 0x00 - (DBD = 0,SPC-2 Page Code 0x3f [Return All Mode Pages], Allocation Length=4)
Tgt->Init (packet#232-233)SCSI: Data In LUN: 0x00 (Mode Sense(6) Response)

Init->Tgt (packet#237)    SCSI: Read(10) LUN: 0x00 (LBA: 0x00000000, Len: 48)

The Target ACK's this packet, then does nothing further.
After 4 seconds, the Initiator tries:

Init->Tgt (packet#239)    SCSI: Test Unit Ready LUN: 0x00

Again, the Target ACK's this packet, then does nothing further.
In packet#241 the initiator FIN's the TCP session.



EVPD Page Code:
0x00 - Supported Vital Product Data Pages
0x80 - Unit Serial Number Page
0x83 - Device Identification Page