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Occasional Contributor
Posts: 7
Registered: ‎06-08-2017

What is the impact of wrong host mode options in Hitachi G1000 ?

What is the impact of wrong host mode options in G1000 ?

External Moderator
Posts: 5,313
Registered: ‎02-23-2004

Re: What is the impact of wrong host mode options in Hitachi G1000 ?

roy.suman1@tcs.com

 

is you question related to Brocade SAN Switches ?

 

if yes, please specified a bit more with Switch Type / model, FOS Version etc....

TechHelp24
Contributor
Posts: 55
Registered: ‎05-12-2013

Re: What is the impact of wrong host mode options in Hitachi G1000 ?

You are better off posting this on HDS forums. That being said it depends on the type of host and what option you selected.
Regular Contributor
Posts: 166
Registered: ‎02-05-2014

Re: What is the impact of wrong host mode options in Hitachi G1000 ?

Antonio and Nate are right but given the fact I work for that company I'll touch on it lightly.

 

Host Mode setting is OS dependant so this selects basically the standard instruction set for a particular OS. If that is set incorrectly some SCSI commands may be interpreted differently whith unpredictable results.

 

HMO (Host Mode Options) are simply flags of which functions and features are enabled or disabled in the array for that specific host.

 

As an example VMware VAAI support can be enabled on all Host-groups but doesn't make sense if the host is AIX or Linux. That's why it is disabled by default.

 

The impact is impossible to predict if HM/HMO are set incorrectly. It can lead to data-loss, corruption, drive disconnect of simply commands being ignored.

 

Simply said, check twice before you do anything. This is not only related to Hitachi arrays but goes for all vendors.

Kind regards,
Erwin van Londen
Brocade Distinguished Architect
http://www.erwinvanlonden.net The Fibre Channel blog



Q&A -> https://hackhands.com/elo/


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Occasional Contributor
Posts: 7
Registered: ‎06-08-2017

Re: What is the impact of wrong host mode options in Hitachi G1000 ?

Thanks a lot :)

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