EQL iSCSI login failures after MS patches KB4497934 --KB4499177 --KB4503267

Hello,

 No other than Dell has been investigating and so far has found no array side issue to explain this.

Strongly suggest opening a case with MS as well.  Increase the visibility of the problem to them.

 Regards,

Don

Dell and Microsoft are aware of the issue and are working on it. For the time being all that can be done is remove the KBs in question and wait for Microsoft to issue the fixed update. 

Hello Kayden,

Correct, as both threads on this indicate.  I only added this thread when a 3rd KB also may cause the issue.

 Regards,

Don

Confirmed removing both KB4499177 and KB4503267 from Windows Server 2016 v1607 restored a working iSCSI connection to our PS-M4110 SAN. I am running the server in an ESXi 6.5 environment.

Previously Event ID 43 from iScsiPrt filled the event log: "Target failed to respond in time for a login request."

Thank you for posting this.

Hello,

 You are very welcome!   Glad you were able to get back online.

 Regards,

Don

So has anyone experienced removing these updates not fixing the problem? I have a couple of servers that are still experiencing issues after removing these updates. I actually rebuilt one of them, and it is still having problems.

One of my Server 2012 R2 servers is also showing the same issues. They worked fine up until patches. 

One of the SAN's is a 6100, and one is a 6000. 

Hello,

 I would open a support case for this. And look for any other KBs at the time of the problem.  First issues were reported in the May time frame and again with some June KB releases.

 I also just posted this thread about  KB4503294

https://www.dell.com/community/EqualLogic/iSCSI-login-failures-after-MS-Patch-KB4503294-installed/m-p/7319814#M13880

 Regards,

Don

Is this only an issue with Server 2016 and Windows 10 systems?   I have 2 2008R2 servers that are critical.  Currently they show as relevant for :

KB4505050

KB4503259

KB4503269

KB4503292

I can't find anything on these, so I may have to cross my fingers and update them...

Hello,

 There have been no reported cases with W2K8R2. 

All the KBs I've seen are for Windows 10, 2016, 2019.

 Regards,'

Don

Looks like an update for Windows Server 2016 is just around the corner, MS just released updates for WS2019 and all the versions of Windows 10 except build 1607 so maybe later today or tomorrow.

KB4509479, KB4509478, KB4509477, KB4509476

Hello,

 Also KB4503294  Seems to include one of the problematic KBs.  But you don't see those until you remove KB4503294  first. 

Regards,

Don

It appears this update Microsoft released today resolves the issue.

https://support.microsoft.com/en-us/help/4509475

I applied this on my Windows Server 2016 box that was having this issue and issue is resolved with the above update.

Nate

Hello Nate,

 Thanks for updating this thread!

Much appreciated.

Don