volume shadow copy

Dear All,

In my office i have windows 2003 R2 server as file server, I create 3
share folder. Currently i want to set up volume shadow copy in the
file server.

I have no idea, how much disk space should be allocated for volume
shadow copy.
The data is around 60 GB and total disk space is 220 GB.

Could anyone help me to determind the space that should be allocated
for volume shadow copy?
your help will be so much appreciated.

Best Regards

Hello sf=,

When you enable shadow copies on a volume, you can specify the maximum amount
of volume space to be used for the shadow copies. The default limit is 10
percent of the source volume (the volume being copied). Increase the limit
for volumes where users frequently change files. Also, setting the limit
too small causes the oldest shadow copies to be deleted frequently, which
defeats the purpose of shadow copies and which will likely frustrate users.
In fact, if the amount of changes is greater than the amount of space allocated
to storing shadow copies, no shadow copy is created. Therefore, carefully
consider the amount of disk space that you want to set aside for shadow copies,
while keeping in mind user expectations for how many versions they want to
be available. Your users might expect only a single shadow copy to be available,
or they might expect three days' or three weeks' worth of shadow copies.
The more shadow copies the users expect, the more storage you need to allocate
for storing them.

Choose this document for starting, including the links:
http://technet.microsoft.com/en-us/l...05(WS.10).aspx

Best regards

Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.
** Please do NOT email, only reply to Newsgroups
** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm


> Dear All,
>
> In my office i have windows 2003 R2 server as file server, I create 3
> share folder. Currently i want to set up volume shadow copy in the
> file server.
>
> I have no idea, how much disk space should be allocated for volume
> shadow copy.
> The data is around 60 GB and total disk space is 220 GB.
> Could anyone help me to determind the space that should be allocated
> for volume shadow copy?
> your help will be so much appreciated.
> Best Regards
>

Dear Meinolf,
Many thanks again for your prompt help. It has been more than 5 times
you help me.
Anyway, There are several question still in my mind:
1. If I enable the shadow copy, 60 GB of data, will it make a copy of
my 60 GB data to my disk for volume shadow copy service? ( so there
will be 60 GB original data, and 60 GB shadow copy data ??)
2. If i allocate 10 GB for shadow copy, where the windows will save
the rest of 50 GB data as i have 60 GB original data?
3. What is the risk of enabling this feature?
4. Can I still access the system incase the disk is totally full?

Thanks in advance.
I am so appreciated with your help.

Best Regards

Hello sf=,

1.
Not really, at configurable intervals, VSS takes a snapshot (aka Shadow Copy)
of the state of content stored on selected volume shares. VSS stores only
the changes for the shares, not the entire share content. For example, if
you make a small change to a 5GB file, VSS stores only information about
the change. The service stores as many as 64 versions of a share, depending
on disk space. When the service creates the 65th Shadow Copy (or if you've
used all the disk space allotted for Shadow Copies), the service deletes
the oldest snapshot to make space for the newest snapshot. For example, if
an application writes only changes to a file when the file is modified, that
application's changes will require far less Shadow Copy space than will an
application that rewrites the entire file.

2.
Use at least the default of 10%.

3.
The risk will be that you DON'T use backup's any more. VSS will NOT prevent
you from doing regular backups. And if the size is not big enough it won't
start.

4.
The server should at least allow you to logon locally so that you can work
on it.

Best regards

Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.
** Please do NOT email, only reply to Newsgroups
** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm


> Dear Meinolf,
> Many thanks again for your prompt help. It has been more than 5 times
> you help me.
> Anyway, There are several question still in my mind:
> 1. If I enable the shadow copy, 60 GB of data, will it make a copy of
> my 60 GB data to my disk for volume shadow copy service? ( so there
> will be 60 GB original data, and 60 GB shadow copy data ??)
> 2. If i allocate 10 GB for shadow copy, where the windows will save
> the rest of 50 GB data as i have 60 GB original data?
> 3. What is the risk of enabling this feature?
> 4. Can I still access the system incase the disk is totally full?
> Thanks in advance.
> I am so appreciated with your help.
> Best Regards
>