What are the strategies available to minimise badblocks on an encrypted partition?

Posted by David Andreoletti on Super User See other posts from Super User or by David Andreoletti
Published on 2012-11-14T02:40:28Z Indexed on 2012/11/14 11:06 UTC
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Filed under:

backup

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encryption

|

bad-blocks

Let me explain my backup strategy and the problem I am facing.

My current backup strategy:

Open encrypted container and execute Carbon Copy Cleaner on it at least once a week.
Rotate backup disks.

Problem:

I have an Truecrypt partition on my 1st external hard disk. I recently found out that some files on this encrypted partition cannot be read due to bad blocks (reported by Antonio Diaz's GNU 'ddrescue').

My backup strategy is ineffective in this scenario because bad blocks are discovered during backup.

Possible strategy

Strategy #0: Have the encrypted partition over a RAID 1 with 2 disks.
- Is this a suitable strategy ?
Strategy #1: Do you think of any other one ?

Environment:

Mac OS X 10.8
External 2.5" hard disk (SATA)
No RAID

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