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Archive for October, 2009

Recover a bit but lose a block

When attempting a data recovery from a Microsoft Exchange email server after a catastrophic failure, and when I say catastrophic I mean, no backup to restore from and file system corruption or file deletion that has rendered the Exchange information store files inaccessible, one of the tools in Altirium’s data recovery arsenal was to trawl the entire disk or RAID volume and identify pages of Exchange data and rebuild the information store from the ashes. However when Microsoft engineers decided to change their page error correction method so that they could correct a single bit error in a page this seemingly minor ‘upgrade’ had dramatic effect in the ability to identify Exchange page data.

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