iscsi offload on rh el based servers guide?

Tarun Reddy treddy at rallydev.com
Sun May 30 09:13:52 CDT 2010


There is a thread going on in the open-iscsi list about the bnx2i
driver. I believe, but haven't tested, that the version of the driver
in rhel 6 beta works but currently not 5.5. I see exactly the same
issue on my r610s.

Tarun

On Monday, May 17, 2010, Clint Dilks <clintd at scms.waikato.ac.nz> wrote:
>
>
>
>
>
>
> On 15/05/10 03:48, Gianluca Cecchi wrote:
>
>   On Fri, May 14, 2010 at 5:40 PM, Gianluca
> Cecchi <gianluca.cecchi at gmail.com>
> wrote:
>   [snip]
>
>
>     But actually I can connect only with one card and only to one
> node..... ;-(
>
>     [snip]
>
>
>
>
>   Just a correction/clarification: the single interface that can
> connect to the EQL, CAN see all the three volumes (in my latest test I
> ran a login to a single target volume)
>   In fact the command:
>
>   [root at orasvi2 LINUX]# iscsiadm --mode node --portal 10.10.100.30:3260
> -I bnx2i.00:10:18:58:e8:f9 --login
>
>
>   now returns
>   Logging in to [iface: bnx2i.00:10:18:58:e8:f9, target:
> iqn.2001-05.com.equallogic:0-8a0906-97d4b5e06-596000000264bc83-blg9-vol3,
> portal: 10.10.100.30,3260]
>   Logging in to [iface: bnx2i.00:10:18:58:e8:f9, target:
> iqn.2001-05.com.equallogic:0-8a0906-8904b5e06-b66000000204bc83-blg9-vol1,
> portal: 10.10.100.30,3260]
>   Logging in to [iface: bnx2i.00:10:18:58:e8:f9, target:
> iqn.2001-05.com.equallogic:0-8a0906-94c4b5e06-df9000000234bc83-blg9-vol2,
> portal: 10.10.100.30,3260]
>   Login to [iface: bnx2i.00:10:18:58:e8:f9, target:
> iqn.2001-05.com.equallogic:0-8a0906-97d4b5e06-596000000264bc83-blg9-vol3,
> portal: 10.10.100.30,3260]: successful
>   Login to [iface: bnx2i.00:10:18:58:e8:f9, target:
> iqn.2001-05.com.equallogic:0-8a0906-8904b5e06-b66000000204bc83-blg9-vol1,
> portal: 10.10.100.30,3260]: successful
>   iscsiadm: Could not login to [iface: bnx2i.00:10:18:58:e8:f9,
> target:
> iqn.2001-05.com.equallogic:0-8a0906-94c4b5e06-df9000000234bc83-blg9-vol2,
> portal: 10.10.100.30,3260]:
>   iscsiadm: initiator reported error (15 - already exists)
>
>
>
>   and the other two volumes get connected (while the previous one
> correctly gets the "already exists" error)
>   .
>   So that
>
>   # multipath -l
>   gives:
>
>
>   vol3 (36090a068e0b5d49783bc640200006059) dm-6 EQLOGIC,100E-00
>   [size=200G][features=1 queue_if_no_path][hwhandler=0][rw]
>   \_ round-robin 0 [prio=0][active]
>    \_ 2:0:1:0 sdd 8:48  [active][undef]
>   vol2 (36090a068e0b5c49483bc3402000090df) dm-3 EQLOGIC,100E-00
>   [size=200G][features=1 queue_if_no_path][hwhandler=0][rw]
>   \_ round-robin 0 [prio=0][active]
>    \_ 2:0:0:0 sdb 8:16  [active][undef]
>   vol1 (36090a068e0b5048983bc0402000060b6) dm-4 EQLOGIC,100E-00
>   [size=200G][features=1 queue_if_no_path][hwhandler=0][rw]
>   \_ round-robin 0 [prio=0][active]
>    \_ 2:0:2:0 sdc 8:32  [active][undef]
>
>
>
>
>
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>
> My own testing with Dell over a 3 - 4 month period found that if you
> are using Broadcom NICS the technology simply does not work.  Dell
> suppy a driver that is suposed to enable iscsi offloading and seems
> to.  But this driver is only compatible with an older version of open
> iscsi that will only support single path rather than multi-path
> configurations.
>
>
>
>
>



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