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So, no way to backup with cleanup to a device small than 2x your backup size?

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Unless I'm missing something, because ATIH will only delete things once a new version of a backup is complete, I cannot perform automatic backups if my storage device isn't twice as big as the data I'm backing up.

My scenario. I have a 2 TB drive I'd like to backup, with about 1.8 TB of data on it. I have a 3 TB USB backup device.

Sure, I can do a full+incrementals (as many as I can fit) but how can I ever get it to start over and give me a new full backup and then proceed with incrementals?

I tried a while back to have one full backup and let it accumulate incremental backup for two months, producing 60 of them. At that point the program became utterly unusable for restoring. In all cases it'd just sit there searching and searching and searching through all the versions... I literally could not restore files at all. Had to throw it all away and start over.

So, here I am about to start over and I wonder if someone could give me some specific advice/directions.

One full backup + 10 incrementals then start all over - I'm backing up 1.8 TB onto a 3 TB device. (with 2.7 free)

Thank you

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How much storage space used for 1 full plus 10 Inc?

The procedure Acronis uses is to create the replacment full before it deletes the old chain. Do you have enought space for that whcih would be 2full plus 10 inc?

Otherwise, the old chain will need to be deleted before the next chain can begin.
Deletion can be done manually from within the program.
or, manually via a batch file,
or using a program such as Chain2Gen which deletes them manually but automatically.

The type of backup scheme needed would depend upon the method used for deletion of old backups.

I would encourage you to gain additonal storage disks as deleting your one and only backup is not a safe situation.
You need some static storage space for possible emergency restore should there be a need.

Approx 50g is needed for 10 Inc in addition to the original 1.8 TB full - So, under 2 TB for 1 full + 10-14 inc.
However, 2 Full= nearly 4 TB and I have only a 3 TB external device. Sounds like I need a 4 TB external device as there is no way to do what I'm asking with the sizes I'm talking about. Right?

Thanks for the reply.

Off topic but, GroverH, you are obviously a technical guy (like myself) and I thought I'd share this with you (and others) because it's rather amazing I think.
Would you agree with every post I have seen online that states the max addressable drive size with MBR and 32-bit OSes is 2.2 TB? According to MS and everywhere I can see, I can't address more than 2.2 TB via my Windows XP SP3 32-bit OS... Well...
Here's my 3 TB WD USB external drive with a 2.72 TB single MBR partition. Literally half a tb larger than the maximum size allowable by MBR.
I'm apparently performing a miracle on a daily basis, so I was hoping I could miracle a solution outta TIH :)

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Most likely, the 3tb is partitioned as GPT rather than mbr.
You can check that via using DISKPART COMMAND LINE function as per attached.
http://forum.acronis.com/system/files/resize/mvp/user285/misc/show-disk…

No sir. This is a Windows XP SP3 32-bit OS, GPT not supported. It's an MBR partition (as shown in previous and this screenshot).
It appears that Western Digital is performing 512e inside the logic board to the USB port.
(and, yet, 512e isn't supported under XP either).
Just ordered the 4 TB version of MyBook and I'm told by others that it'll work with XP SP3 as a single partition with no special drivers or tricks.
Then I'll have enough space to have two full backups at once

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Let us know how you make out with the 4 TB. It wold seem that the manufacturer of 3 and 4 is doing something special to make them uable for more people.

Follow up: MyBook 3 and 4 TB drives work just fine with 32-bit Windows XP, despite what you might read, including what appears to be an absolute "No Way" form MS itself in a dozen places. Basically I found nothing but "you can't do this" comments everywhere, and yet, here I sit with both a 3 and 4 TB USB drive attached to my 32-bit WinXP system accessing every byte on it. So, WD is doing something with 512e is my guess.