Hi all

I'm using RHEL 6.1 (fully patched, 2.6.32-131.12.1.el6.x86_64 with
iscsi-initiator-utils-6.2.0.872-21.el6.x86_64) on HP BL460c G7 blades
talking to a P4500 14.4TB Virt SAN (two clustered P4500 boxes).

As the blade has two FlexHBA (iSCSI) interfaces I want to do
multipathing.  Is the following valid? (Spefically, should both ifaces
have the same iqn?)
---
iscsiadm -m iface
default tcp,<empty>,<empty>,<empty>,<empty>
iser iser,<empty>,<empty>,<empty>,<empty>
be2iscsi.00:17:a4:77:10:01 be2iscsi,
00:17:a4:77:10:01,<empty>,<empty>,iqn.2011-08.scada.benvir2p
be2iscsi.00:17:a4:77:10:00 be2iscsi,
00:17:a4:77:10:00,<empty>,<empty>,iqn.2011-08.scada.benvir2p
---

In this setup, I can only login to the LUN on iface be2iscsi.
00:17:a4:77:10:01.  When I attempt to login with the other iface I get
'iscsiadm: No records found'.

I have other servers where I'm only using a single FlexHBA (be2iscsi)
and they are having their own troubles.  For example, dmesg is
reporting lots of:
---
scsi: host 0 channel 0 id 0 lun4194304 has a LUN larger than allowed
by the host adapter
device-mapper: table: 253:7: multipath: error getting device
device-mapper: ioctl: error adding target to table
device-mapper: table: 253:7: multipath: error getting device
device-mapper: ioctl: error adding target to table
scsi: host 0 channel 0 id 0 lun4194304 has a LUN larger than allowed
by the host adapter
device-mapper: table: 253:7: multipath: error getting device
device-mapper: ioctl: error adding target to table
device-mapper: table: 253:7: multipath: error getting device
device-mapper: ioctl: error adding target to table
---

cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: HP       Model: P410i            Rev: 3.66
  Type:   RAID                             ANSI  SCSI revision: 05
Host: scsi0 Channel: 00 Id: 00 Lun: 01
  Vendor: HP       Model: LOGICAL VOLUME   Rev: 3.66
  Type:   Direct-Access                    ANSI  SCSI revision: 05
Host: scsi1 Channel: 00 Id: 00 Lun: 00
  Vendor: LEFTHAND Model: iSCSIDisk        Rev: 9000
  Type:   Direct-Access                    ANSI  SCSI revision: 05

cat /proc/partitions
major minor  #blocks  name

   8        0  586029016 sda
   8        1     512000 sda1
   8        2  585515008 sda2
 253        0    2097152 dm-0
 253        1   50331648 dm-1
 253        2    4194304 dm-2
 253        3    4194304 dm-3
 253        4    4194304 dm-4
 253        5    4194304 dm-5
   8       16 1073741824 sdb
 253        6 1073741824 dm-6

This is all standard data iSCSI, I'm not attempting to do iSCSI
booting at all.

I've been trying to make this work for a while now and I'm wondering
if I should just use software iSCSI?

Thanks

CC

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