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How To Use 2 Different External HDD

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lucaleoncavallo

Posted: Monday, February 01, 2010 12:31:31 PM

Rank: Newbie
Groups: Member

Joined: 2/1/2010
Posts: 2
Location: Italy

Hi,

I'm using Amanita for our backup needs.

We have two Ethernet HDD that we plan to use for this task and the idea is to switch the HDD used in order to have one HDD that is "ONLINE" and the other that is "OFFLINE" and keeped in a safe place.

Every week we want to switch the disk

The question is : is there a quick way to configure Cobian for this kind of procedure?

If, for istance, I set two different backup path (one for each disk) the backup will work if every time one of the two path will be inaccessible?

Please let me know.

Thanks, Luca

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Posted: Monday, February 01, 2010 12:31:31 PM

Glenn

Posted: Monday, February 01, 2010 2:55:36 PM

Rank: Advanced Member
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Joined: 12/21/2007
Posts: 965
Location: USA

Cobian is not designed to manage removable media. Cobian simply copies to the specified destination. It you are using separated backups, Cobian deletes expired backup sets from the destination, so you would have to ensure that the correct media is installed when Cobian wants to delete from it.

Glenn

lucaleoncavallo

Posted: Tuesday, February 09, 2010 11:08:10 AM

Rank: Newbie
Groups: Member

Joined: 2/1/2010
Posts: 2
Location: Italy

Hi Glen,

Thank you for the answer. If I understand it means that if i use my "HDD switch polic"y than Cobian can't delete old backup because hecan't find the files.
But setting two backup path at least Cobian can do the backup also if a path was invalid?
If so the problem that we got is only the deletion of old backup files.... an issue that maybe can be solved doing it manually or with a small custom application

Please, let me know.

Luca

Glenn

Posted: Tuesday, February 09, 2010 2:12:28 PM

Rank: Advanced Member
Groups: Moderators

Joined: 12/21/2007
Posts: 965
Location: USA

>>If I understand it means that if i use my "HDD switch polic"y than Cobian can't delete old backup because hecan't find the files.

If the files are not there, Cobian will not delete them.

>>But setting two backup path at least Cobian can do the backup also if a path was invalid?

Cobian will blindly backup if there is a destination.

>>If so the problem that we got is only the deletion of old backup files.... an issue that maybe can be solved doing it manually or with a small custom application

Except if Cobian does not delete, then its History will not reflect what you do at the destination.

Cobian 10 in beta test may offer more options... I have not checked this out yet.

Glenn

DccD

Posted: Tuesday, February 09, 2010 8:09:10 PM

Rank: Newbie
Groups: Member

Joined: 2/9/2010
Posts: 1
Location: New Caledonia

I would do this by starting a batch file before the backup.

That batch will try to check the presence of one or the other drives.
When a drive is online it will create a share drive (using the net use command) that will get (for instance) the letter Z.
So the task in Cobian Backup will always have Z:\... as a destination.

Edit the task, go in Events, then Pre-backup events. Here you can add the batch you have created.

If needed you can delete the share drive after the task ends by adding a second batch file to the Post-backup events. It should contain the net use z: /delete command.

Is it what you were expecting?

ctsrutland

Posted: Thursday, February 11, 2010 10:16:21 AM

Rank: Member
Groups: Member

Joined: 1/30/2008
Posts: 16

Cobian 10 allows you to use the drive label in the destination. So you can have the destination as:
%DISKLABEL="mydrivename":\backup

That at least allows for the attached backup device having a different drive letter.

Now, suppose you have two backup tasks, identical except for the drive label, and have both of them set to run every day. Each day, one of them will fail because the drive it wants isn't there, while the other one will run.

So I think that will do what you want, but it will generate an error every day!

If you could run a batch file before each task to test for the presence of the volume label concerned it would work perfectly! I don't know ho wto do that though..

Radar69

Posted: Wednesday, February 17, 2010 5:39:52 PM

Rank: Newbie
Groups: Member

Joined: 2/17/2010
Posts: 1
Location: Switzerland

Hello !

(~ I have not a good english ~)

I have long time tested a solution on two HDD ou USB key...
The only way that I have resolved this problem is :

1. Make all your backup on a same folder destination (for HDD1 and HDD2) : example "F:\CobianBackup\" (use a special name for best security)
2. Make on your Local HardDisk, a BatchFile that have this command "RMDIR /S /Q F:\CobianBackup". (This command delete all existant backup on the HDDx)
3. Make a backup, all Monday, a FULL backup, Reset attributes, Separe Date and Time, and 0 Copy complete.
4. Attach a event that start BEFORE the Monday backup, with the BatchFile "RMDIR..."
5. Make a backup, all Tue/Wed/Thu/Fri/... (NO MONDAY), a Incremential backup, Reset attributes, Separe Date and Time, and 0 Copy complete, and 0 Complete cycle.
(It's possible to make a Différental backup, all same, but "NO reset attributes" !)
6. Change the Hard-disk HDD1 and HDD2, the last day of the week (sample: Friday or Saturday... but NOT Monday !)

Testing this solution, this is my ONLY found solution and it's work fine ! Glad

You can wrote for have my BatchFile (whith parameter security option).

- Too bad that Cobian, can not programmed Backup all 14 or 21 days...
- Too bad that Cobian, after not find the Old-Backup (Backup on safe HDDx), delete on catalog list, and after can not delete Backup on HDDx one week after.
- One of this two correction on Cobian, can make other "dynamics" solutions for backup (Best live for Cobian !).

(~ I have not a good english ~)

Best regard

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