Ken A wrote:
> 
> Yes, thanks, turning off nops helped with some of the timeouts. The mkfs 
> succeeded (very slowly), with this block of errors repeating in the log 
> (see below).
> 
> I should mention that this is on a asynchronous link, (100mbps initiator 
> <-> 1000mbps target).
> The initiator is running Fedora 8, 2.6.25.6-27.fc8, open-iscsi 2.0-865.

Are you using the tools and kernel modules from 2.0-865? Or the iscsi 
kernel modules from 2.6.25.6-27.fc8 and tools from the rpm?

If you did a make and make install with open-iscsi 2.0-865 from 
open-iscsi.org then you are using the tools and kernel modules from the 
open-iscsi.org.


> Target is Wasabi Storage Builder.
> 
> Any ideas?


Is there anything on the target logs?

With a 100 mbs link we might have been sending too much IO, but I would 
have expected to see some messages about scsi commands timing out and 
host resets firing. You can try setting these in iscsid.conf:

node.session.cmds_max = 16
node.session.queue_depth = 8

Again, set them then rerun discovery and relogin.

But if that does not work, and I think if it does it might just be a 
bandaid, then you should remove the iscsi-initiator-utils rpm by doing

rpm -q iscsi-initiator-utils

Then run these tools and kernel modules frmom 
http://www.open-iscsi.org/bits/open-iscsi-2.0-869.2.tar.gz
and build it with
make DEBUG_SCSI=1 DEBUG_TCP=1
make DEBUG_SCSI=1 DEBUG_TCP=1 install

then rerun your test. You might have to reboot or manually unload the 
old iscsi modules too.



> 
> Thanks,
> Ken
> 
> Jun 25 14:16:24 testserver kernel:  connection3:0: detected conn error 
> (1011)
> Jun 25 14:16:24 testserver kernel: sd 4:0:0:0: [sde] Result: 
> hostbyte=DID_BUS_BUSY driverbyte=DRIVER_OK,SUGGEST_OK
> Jun 25 14:16:24 testserver kernel: end_request: I/O error, dev sde, 
> sector 1838511
> Jun 25 14:16:24 testserver kernel: printk: 474 messages suppressed.
> Jun 25 14:16:24 testserver kernel: Buffer I/O error on device sde1, 
> logical block 919224
> Jun 25 14:16:24 testserver kernel: lost page write due to I/O error on sde1
> Jun 25 14:16:24 testserver kernel: Buffer I/O error on device sde1, 
> logical block 919225
> Jun 25 14:16:24 testserver kernel: lost page write due to I/O error on sde1
> Jun 25 14:16:24 testserver kernel: Buffer I/O error on device sde1, 
> logical block 919226
> Jun 25 14:16:24 testserver kernel: lost page write due to I/O error on sde1
> Jun 25 14:16:24 testserver kernel: sd 4:0:0:0: [sde] Result: 
> hostbyte=DID_BUS_BUSY driverbyte=DRIVER_OK,SUGGEST_OK
> Jun 25 14:16:24 testserver kernel: end_request: I/O error, dev sde, 
> sector 1314223
> Jun 25 14:16:25 testserver iscsid: Kernel reported iSCSI connection 3:0 
> error (1011) state (3)
> Jun 25 14:16:28 testserver iscsid: connection3:0 is operational after 
> recovery (2 attempts)
> 
> 
> 
> 
> 
> 
> 


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