O'Reilly logo

Mastering PowerCLI by Sajal Debnath

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Applying VMFS resignaturing

Since we are talking about managing storage in vSphere environments in this chapter, I felt we should cover one extra topic here. One of the common tasks in vSphere is VMFS resignature. First, let's try to find out what a VMFS resignaturing task is.

By default, ESXi mounts all the datastores that are visible to the host. Each datastore has a unique UUID that is stored in the datastore superblock. Also, the unique LUN ID is store in the VMFS metadata. When a LUN is replicated, all the information is copied block by block and we get an identical LUN. If the original datastore had an UUID as X, the copied LUN also has an UUID as X.

Consider the case when you want to mount the replicated LUN; ESXi will see a duplicate LUN ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required