This is a very nice opening post as it provides the info that's needed to begin to figure this out. One thing that's missing is the "esxcli swiscsi nic list -d vmhba 33". This output confirms if the vmkernels were assigned to the iSCSI initiator. Your problem is that you are using a single subnet for the whole iSCSI setup.   Each NIC (that you want to use for iSCSI) needs it's own subnet. If you cannot get (from your network group) more than the 10.10.102.0-255 range, just subnet it with a 27 bit subnet mask. Gateways are irrelevant as I doubt your server is going to try to connect to a SAN in a completely different network, so you don't have to worry about needing to make/create additional gateways on the switch(es). Here is an example setup based on your IP ranges and modifying them with a 27 bit (255.255.255.224) subnet mask (to prevent needing to get more IP ranges): SAN iSCSI ports: Controller 0: iSCSI port 0: 10.100.102.1 iSCSI port 1: 10.100.102.33 iSCSI port 2: 10.100.102.65 iSCSI port 3: 10.100.102.97 Controller 1:  iSCSI port 0: 10.100.102.2 iSCSI port 1: 10.100.102.34 iSCSI port 2: 10.100.102.66 iSCSI port 3: 10.100.102.98   Server iSCSI info (in a context that's hopefully understandable): - vmnic7 -> iSCSI Network -> vmk1 -> 10.100.102.3 - vmnic6 -> iSCSI Network 2 -> vmk2 -> 10.100.102.35 - vmnic5 -> iSCSI Network 3 -> vmk3 -> 10.100.102.67 - vmnic4 -> iSCSI Network 4 -> vmk4 -> 10.100.102.99   Does this info make sense?
I'm having a problem with a MD3200i and our new T710 virtual server - it works, but performance is absolutely abysmal.  Here's the details.... Server is a T710, 4 onboard nics + a 4 port Intel Server NIC.  Its running the latest update of ESXi 4.1 - right now it has 6 hosts on it, going to be 10 total (most are lightly loaded special purpose servers). Server is connected to the SAN by 4 cables direct from the 4 port Intel Server NIC to the 4 ports on the management controllerWe have 4 drives (2TB SAS) in the SAN - not my first choice - but what the customer wanted. Array is set up as a RAID-10.  We have 3 logical volumes - 2 TB, 1 TB, and 750 GB.  Each is formatted as a VMFS datastore.I followed the instructions in the Dell whitepaper for setting up the MD3200 with ESX 4.1 and it doesn't appear we have multpathing working correctly.  The VCenter Client is only showing 6 paths usable - should be 12 total (3x volumes * 4 network cards).I've gone through the docs a handful of times, can't find anything that strikes me as an obvious problem.  Below is the output of some of the commands in the documentation - if anything else would be helpful let me know.  I feel like i'm running in to a brick wall here, any advice would be great!   Thanks in advance.... ~ # esxcfg-nics -lName    PCI           Driver      Link Speed     Duplex MAC Address       MTU    Description                   vmnic0  0000:01:00.00 bnx2        Up   1000Mbps  Full   00:25:64:fe:51:c1 1500   Broadcom Corporation Broadcom NetXtreme II BCM5709 1000Base-Tvmnic1  0000:01:00.01 bnx2        Down 0Mbps     Half   00:25:64:fe:51:c3 1500   Broadcom Corporation Broadcom NetXtreme II BCM5709 1000Base-Tvmnic2  0000:02:00.00 bnx2        Down 0Mbps     Half   00:25:64:fe:51:c5 1500   Broadcom Corporation Broadcom NetXtreme II BCM5709 1000Base-Tvmnic3  0000:02:00.01 bnx2        Down 0Mbps     Half   00:25:64:fe:51:c7 1500   Broadcom Corporation Broadcom NetXtreme II BCM5709 1000Base-Tvmnic4  0000:83:00.00 igb         Up   1000Mbps  Full   00:1b:21:77:3b:08 9000   Intel Corporation 82576 Gigabit Network Connectionvmnic5  0000:83:00.01 igb         Up   1000Mbps  Full   00:1b:21:77:3b:09 9000   Intel Corporation 82576 Gigabit Network Connectionvmnic6  0000:84:00.00 igb         Up   1000Mbps  Full   00:1b:21:77:3b:0c 9000   Intel Corporation 82576 Gigabit Network Connectionvmnic7  0000:84:00.01 igb         Up   1000Mbps  Full   00:1b:21:77:3b:0d 9000   Intel Corporation 82576 Gigabit Network Connection ~ # esxcfg-swiscsi -qSoftware iSCSI is enabled ~ # esxcfg-scsidevs -avmhba0  ata_piix          link-n/a  sata.vmhba0                             (0:0:31.2) Intel Corporation 2 port SATA IDE Controller (ICH9)vmhba1  mptsas            link-n/a  sas.5842b2b04cd6af00                    (0:3:0.0) LSI Logic / Symbios Logic Dell SAS 6/iR Integratedvmhba32 ata_piix          link-n/a  sata.vmhba32                            (0:0:31.2) Intel Corporation 2 port SATA IDE Controller (ICH9)vmhba33 iscsi_vmk         online    iqn.1998-01.com.vmware:spag-261d8287    iSCSI Software Adapter           ~ # esxcfg-vmknic -lInterface  Port Group/DVPort   IP Family IP Address                              Netmask         Broadcast       MAC Address       MTU     TSO MSS   Enabled Type                vmk0       Management Network  IPv4      10.100.101.251                          255.255.255.0   10.100.101.255  00:25:64:fe:51:c1 1500    65535     true    STATIC              vmk1       iSCSI Network       IPv4      10.100.102.20                           255.255.255.0   10.100.102.255  00:50:56:74:38:cc 9000    65535     true    STATIC              vmk2       iSCSI Network 2     IPv4      10.100.102.21                           255.255.255.0   10.100.102.255  00:50:56:7b:ce:6a 9000    65535     true    STATIC              vmk3       iSCSI Network 3     IPv4      10.100.102.22                           255.255.255.0   10.100.102.255  00:50:56:75:19:70 9000    65535     true    STATIC              vmk4       iSCSI Network 4     IPv4      10.100.102.23                           255.255.255.0   10.100.102.255  00:50:56:78:e8:66 9000    65535     true    STATIC      ~ # esxcfg-vswitch -lSwitch Name      Num Ports   Used Ports  Configured Ports  MTU     Uplinks   vSwitch0         128         13          128               1500    vmnic0,vmnic1,vmnic2,vmnic3  PortGroup Name        VLAN ID  Used Ports  Uplinks     VM Network            0        7           vmnic0,vmnic1,vmnic2,vmnic3  Management Network    0        1           vmnic0,vmnic3Switch Name      Num Ports   Used Ports  Configured Ports  MTU     Uplinks   vSwitch2         128         9           128               9000    vmnic4,vmnic5,vmnic6,vmnic7  PortGroup Name        VLAN ID  Used Ports  Uplinks     iSCSI Network 4       0        1           vmnic4      iSCSI Network 3       0        1           vmnic5      iSCSI Network 2       0        1           vmnic6      iSCSI Network         0        1           vmnic7    
MD3200i / ESXi 4.1 Multipathing problem