Description of problem:
iscsi sessions to Equallogic PS300 array started using "iscsistart" hang.
Same software works on Enterprise ISCSI Target
Version-Release number of selected component (if applicable) 684
How reproducible: Boot FC 6 T2. Use iscsistart to create a session. Attempt
to do IO (read ) on session. (Also occurs if you use iscsistart in initrd,
but boot from HDD is easier to reproduce.)
Steps to Reproduce:
1. Boot FC6 T2
2. issue iscsistart command to create session
3. read from new disk
Actual results: After a few seconds, read application will hang.
Expected results: read should succeed.
Additional info: This software works with iscsid/iscsiadm. This software
works agains Enterprise ISCSI Target.
Prelimary trouble shooting of enclosed files by Equallogic indicated this was
an iscsistart/iscsis initiator problem.
Created attachment 137088 [details]
shell script, commands output, wireshark output, tcpdump capture file
What arch are you using?
And you are using iscsistart from the Fedora rpms correct? If so could you try
the tools and kernel from the current development snapshot?
The "development" dir like on this mrror, has some bug fixes and updates:
Could you also run iscsistart with "-d 8"?
And was there anything in your kernel logs?
arch == x86 (32 bit)
I will update to the latest. This will take me one or two days
OK, I will use iscsistart -d 8
There was nothing in /var/log/messages
Thanks for you patience and help. I will provide new info in bugzilla on
Mark do not bother sending me info. I got access to a equalogic target now and
can reproduce this here. It seems that we log in ok. are redirected ok, but then
for some reason there is a connection failure a couple seconds after the disk is
found and since iscsistart is only there to connect the IO hangs.
This works with iscsiadm + iscsid because iscsid can handle the error and relogin.
I suspect the problem is that the equalogic target is sending us noop, we do not
respond (iscsid handles this and is not up) and then the target drops the
I will send a patch shortly.
As a temp work around, I think you can disable the target from send nops. I do
not have admin access to the target here, so I am not sure though. I ccd someone
from equalogic that does know or can find out.
Unfortunately, you cannot disable the keepalive NOPs from the EqualLogic array.
In the most recent release (3.0.5), we do not send a keepalive within the first
300 seconds after a connection is established.
Thanks for the reply Cesar. The 300 sec bahavior, should be enough to get us
I will continue to work on supporting nops in the kernel instead of userspace so
there is a fool proof solution.
I did reproduce using today's code (2.6.18-1.2693.fc6), but it looks like you
are way past that. At least I am set up to test the patch.
I upgraded my array to 3.0.5 and the problem did go away (my application does
not wait 300 seconds between accesses), so this is a valid work around.
Fedora Core 5 and Fedora Core 6 are, as we're sure you've noticed, no longer
test releases. We're cleaning up the bug database and making sure important bug
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