Forum Discussion

nitj's avatar
nitj
Level 3
12 years ago

San migration

Hi Guys, I have one concat volume say vol01. I am planning to create a striped plex on new storage devices and attach it to the existing volume vol01 and mirror it with existing concate plex. Kindly ...
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  • mikebounds's avatar
    mikebounds
    12 years ago

    Layered volume give exact same performance and the data is in exactly the same place as non-layered, but VM creates more objects which means it is more complicated, but gives more reliance as more disks can fail without the volume failing.   But if this is just a migration step, then I guess you will delete the plex on the old array, so there is no point in a layered volume and actually, the volume could not be created as layered as this requires both plexes to be stripes.  Layered volumes are created where possible over a certain size, but you can override this trigger point as in my last post to the largest possible volume so layered volumes are disabled.

    Mike

mikebounds's avatar
mikebounds
Level 6
12 years ago

Layered volume give exact same performance and the data is in exactly the same place as non-layered, but VM creates more objects which means it is more complicated, but gives more reliance as more disks can fail without the volume failing.   But if this is just a migration step, then I guess you will delete the plex on the old array, so there is no point in a layered volume and actually, the volume could not be created as layered as this requires both plexes to be stripes.  Layered volumes are created where possible over a certain size, but you can override this trigger point as in my last post to the largest possible volume so layered volumes are disabled.

Mike