Amount of time taken by validate byte-for-byte

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Bob Coleman
Posts: 785
Joined: Fri Aug 12, 2011 5:58 pm

Amount of time taken by validate byte-for-byte

Post by Bob Coleman »

Given a full backup with validate byte-for-byte, the amount of time taken to create the image and that taken to validate are about the same.

Validating an incremental backup takes dramatically less time than creating it.

I have cases where creating the image takes 20 minutes and the validation takes 20 seconds.

Can the validation be doing what its designed to do in so little time?
TAC109
Posts: 273
Joined: Tue Sep 06, 2011 10:41 pm

Re: Amount of time taken by validate byte-for-byte

Post by TAC109 »

When creating the incremental backup, usually the complete source disk must be transversed, which takes a while. However the byte-for-byte verification is only for the data just written to the incremental backup, so much less of the source disk has to be read back for this purpose, and therefore this process is much quicker.
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