Create a file system

[Feljav]

I created a LUN in a VA storage. Now, in the OS, I have two device files for the same disk. When I create a VG refering to that disk, do I have to indicate both device files in the command line?

[Pete Randall · Accepted solution]

From "man vgcreate":

"You can specify physical volume links (pv-links) for a physical volume providing different paths that reference the same physical volume in the pv_path list. The order in which the paths are listed is important. The first path becomes the primary link to the physical volume, the second becomes an alternate link to the physical volume."


Pete

[Berd]

Feljav,

It's not essential to supply both device files, but it certainly makes sense to as you will then have 2 paths to the disk. Providing resilience, and performance offerings.

Berd

[spex]

The best way to designate primary and alternate links is to specify both PVs within the 'vgcreate' command. However, you can also add an alternate path after VG creation via the 'vgextend' command.

[Geoff Wild]

Do you have to? no - but you might as well - else you have to run a vgextend later - if you want to use that other path that is.

Rgds...Geoff