How's different snapshot and snapclone?

[nataris]

How's different snapshot and snapclone? and what does it mean "mirror copy"?

Anyone have any doc to explain about them?

[IBaltay]

Hi,
here is the EVA Business Copy Admin guide with the needed explanations:
http://bizsupport.austin.hp.com/bc/docs/support/SupportManual/c01375088/c01375088.pdf

[Steven Clementi]

Snapshot = point in time representation of data (all the data is not copied, only the data that it changed after the snapshot is taken).

Snapclone = bit for bit copy of a virtual disk.

MirrorCopy = Ongoing local replication of a virtual disk, until it is broken at which point the "copy" becomes it's own virtual disk. (I could have this a little wrong in some ways. I don't do much with MirrorCopy, but will check tomorrow when I am on an EVA.)

Snapshot generally only takes up the necessary space to hold the "changed" data.

Snapclone will cost the full amount of storage as the original virtual disk.


Steven

[skris]

Hi Nataris,
Our fellow ITRC'ans have already explained a lot. Just to add to that;

> Snapshot's are solely dependent on the Master volume. (if the Source volume fails you could not restore, no matter how many snapshots you have.

> Snapclones will be totally independent once the job is Complete. So even if the parent volume failed, you could have the volume available.