topic Re: Creating SnapClone via SSSU in Storage Software

Creating SnapClone via SSSU

Cem Tugrul — Fri, 24 Dec 2004 01:56:22 GMT

Hi Forum,

i have EVA with six disk enclosures with 14Bay
and totally 84 Disks on it.i have also 3 SAN swichts (2)2/8 (1)2/16 and cascaded...Anyway,
i have 4 VirtualDisk folders 5 Hosts 4 Disk Groups

i want to create 3 snapclones from one of my VirtualDiskFolders's subdirectories into one of my Disk Groups (Let's say Disk Group 3) and
present them to my one of my host via using
SSSU command prompt.
i know i have to use "add copy" command but
how can i define Disk Group information?
Also it is important that the new created(cloned Disk) must be read only position so
How can i write(syntax) these all properties
from SSSU command?
Any suggestions would be appreciated...
Greetings,

Re: Creating SnapClone via SSSU

Uwe Zessin — Fri, 24 Dec 2004 03:43:11 GMT

Hello cem,
it is part of the 'ADD COPY' command:

> ADD COPY ... DISK_GROUP="\Disk Groups\Disk Group 3"

You need to put the write-lock later on:

> SET VDISK ... WRITE_PROTECT

Re: Creating SnapClone via SSSU

Cem Tugrul — Fri, 24 Dec 2004 05:35:09 GMT

Hello Uwe,

Thank's so much for your answer.Also Could you please try to give answers some Q below;

Let's say i want to create a snapcolone from
one of VirDisk group disk into a Disk Group 3 which belongs to host A at time t0
And then i want to present this to host B.
and go to host B and create vg,lv,fs for this clone.
The Q is what is the difference "read/write" or
"read only" creating snapclone????
On host A if data changed at time t1
so also will it be changed cloned disk which mounted on Host B????
so while creating a snapclone of disk giving
read/write or read only option is using for
this purpose????

Re: Creating SnapClone via SSSU

Georges Esteves — Mon, 27 Dec 2004 04:11:15 GMT

hi,

the "read only" attribut means that when you present a lun to host,it can't write to this lun !!!

the "read/write" attribut means that when you present a lun to host,it can write/modify the content of the lun !!!

if this lun is a clone, there is no more link between the original and the clone !!!
so if you modify the original, the clone won't be updated !!!!

hope it will answer your question !!

Re: Creating SnapClone via SSSU

Cem Tugrul — Mon, 27 Dec 2004 06:05:05 GMT

Esteves and Uwe gave the solution.