‎Unity iSCSI connection setup | DELL Technologies

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ayas

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ayas

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April 24th, 2017 01:00

Unity iSCSI connection setup

Hi there ...

Can anybody confirm below registration need to be set ONLY iSCSI service is ON upon connecting Unity ?

・LinkDownTime

・AsyncLogoutPauseTimeout

・DelayBetweenReconnect

・SrbTimeoutDelt

・MaxRequestHoldTime

As https://support.emc.com/docu69325_Unity-Configuring-Hosts-to-Access-Fibre-Channel-(FC)-or-iSCSI-Storage.pdf?language=en_US

Page 59 shows above registry and seems indicating this need to be set even it is FC connection ...

thanks !

aya

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kelleg
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Posted April 26th, 2017 13:00
Those values need to be set IF you're running PowerPath and it's for both FC and iSCSI and you are connecting a Windows host.

Also, for iSCSI you need to disable TCP Delayed ACK - please see the following article:

https://support.emc.com/kb/468345

glen
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steverudo
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Posted May 17th, 2017 12:00
Following up on an older thread, looking to find the answer.

It also seems to matter which type of NIC, and in this case I have TCP-offloaded (Intel 560FLR)

Do we need to tweak win2k16/iscsi on Unity (no powerpath)

docu69325_Unity-Configuring-Hosts-to-Access-Fibre-Channel-(FC)-or-iSCSI-Storage.pdf

MaxRequestHoldTime

KB468345

delayed ACK timer

Disable Large Send Offload (LSO)

TcpAckFrequency

Thanks
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kelleg
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Posted May 23rd, 2017 09:00
As far as I can determine the settings for iSCSI interfaces on Windows 2016 should be the same as on 2012. For TOE interfaces, you'll need to make sure that the drivers are up to date.

glen