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achvn
Enthusiast
Enthusiast

SAN MIgration with esx 3.5

Hi community,

We plan to migrate part of our VI to a new site. The disk bay will be moved to this new site and a switch will be added to the SAN fabric with the disk bay connected to it, therefore the switch FC id will chnage. We did not plan any lun migration.

Does anybody know how will the ESX server behave with SCSI path ? Will they consider the LUN on the moved disks as new LUNs ?

I assume ESX does not build its scsi path based on FC Id but on LUN WWN, right ?

Thanks for your answers,

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3 Replies
Texiwill
Leadership
Leadership

Hello,

This is a presentation issue. Unless you keep the same LUN ID, ESX will see the presentation as different. The UUID for the VMFS may also change. Before you do this, I suggest you make a very good, tested backup.....


Best regards,

Edward L. Haletky

VMware Communities User Moderator

====

Author of the book 'VMWare ESX Server in the Enterprise: Planning and Securing Virtualization Servers', Copyright 2008 Pearson Education.

Blue Gears and SearchVMware Pro Blogs: http://www.astroarch.com/wiki/index.php/Blog_Roll

Top Virtualization Security Links: http://www.astroarch.com/wiki/index.php/Top_Virtualization_Security_Links

--
Edward L. Haletky
vExpert XIV: 2009-2023,
VMTN Community Moderator
vSphere Upgrade Saga: https://www.astroarch.com/blogs
GitHub Repo: https://github.com/Texiwill
achvn
Enthusiast
Enthusiast

Texiwill,

Thanks for your answer.

The LUN Id should not change - so you confirm the VMFS UUID will not change either?

I have not been able to find information on how exactly ESX build its SCSI pat (For example, doing the above would not cause any problem with physical windows boxes but would require some reconfiguration on some Unix systems).

Anybody else already faced this problem?

Regards,

A

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Texiwill
Leadership
Leadership

Hello,

The LUN Id should not change - so you confirm the VMFS UUID will not change either?

The LUN ID depends on how it is presented to the ESX server so if you are not going to change this, or present it the same way then things should be fine. However, I would make a backup just in case.


Best regards,

Edward L. Haletky

VMware Communities User Moderator

====

Author of the book 'VMWare ESX Server in the Enterprise: Planning and Securing Virtualization Servers', Copyright 2008 Pearson Education.

Blue Gears and SearchVMware Pro Blogs: http://www.astroarch.com/wiki/index.php/Blog_Roll

Top Virtualization Security Links: http://www.astroarch.com/wiki/index.php/Top_Virtualization_Security_Links

--
Edward L. Haletky
vExpert XIV: 2009-2023,
VMTN Community Moderator
vSphere Upgrade Saga: https://www.astroarch.com/blogs
GitHub Repo: https://github.com/Texiwill