Using tape as a backup target
zoltank
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Re: How to verify tape backup content and integrity

Post by zoltank »

People need to stop equating read-after-write to tape verify. They are NOT equivalent and they do NOT protect against the same thing.

Read-after-write only verifies the data that was sent to the drive is what was written to the tape. It does NOT protect against bad data being sent to the tape, which is what tape verify does.

Tape verify computes a checksum for the data on the source while it's being read, then writes the checksum to the tape. It then recomputes the checksum from the data on the tape and compares it to the original checksum. This makes sure the data on the source is what was actually sent and written to the tape. So let's stop perpetuating the myth that read-after-write is a replacement for tape verify, when it's not and never will be.

When the integrity of a company's DR is in question, not running tape verify is irresponsible.

We've been using LTO for well over a decade now, and we've had it fail verify a couple times. Yes it's rare, but when your DR is at stake, rare is still too often.

digicube
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Re: How to verify tape backup content and integrity

Post by digicube »

Is LTO6 considered a modern tape drive? How about LTO4? LTO2?

Dima P.
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Re: How to verify tape backup content and integrity

Post by Dima P. »

Robert,

Veeam B&R supports LTO3 and all generations above. LTO6 is still used, but I have not heard about LTO4 for a very long time. Hope that helps, cheers!

Dima P.
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Re: How to verify tape backup content and integrity

Post by Dima P. »

Hi guys!

Tape verification is now possible with latest Veeam B&R v11, here a very short description how to use it Verifying Tapes. Happy testing and do not forget to share your feedback with us. Cheers!

dweide
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Re: How to verify tape backup content and integrity

Post by dweide » 3 people like this post

The new function simply works, thanks for adding this requested fearture to V11!

Dima P.
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Re: How to verify tape backup content and integrity

Post by Dima P. »

Thank you for the heads up, glad you like new functionality and will share your feedback with the team. Cheers!

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