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Thanks, Bart, for your precise clarification! |
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So I can skip that ... |
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Am Monday 26 April 2004 11:11 schrieb Calum: |
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> On Monday 26 April 2004 09:41, Sven Vermeulen wrote: |
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> What would happen if there was a bit of file corruption |
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> near the beginning of the tape - |
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> would that make the remaining data useless? |
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Short: Better assume "Yes". |
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Long: |
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This is not a point correlating to encryption at all ! |
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Not even specific to tape etc. ... |
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Even if you just use tar plain to <medium>, |
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if the beginning of the recording gets corrupted, |
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no matter by which reason at all, |
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during restore you probably get some ERROR like |
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"This doesn't seem to be a valid TAR archive". |
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As Sven Vermeulen already pointed out the mail before: |
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"You ALWAYS have to assume the worst". |
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So just take this serios and |
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evaluate the Backup- / Restore-chain as a whole ! |
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- Do your backup along your whole chain. |
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- Do the verify of the resulting Backup the same way. |
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- Do a Restore onto a different disk. |
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- Compare thoroughly if the Restore really matches your Source. |
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Evaluate the amount of trust you can put into your media over time ! |
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Using Tapes: |
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Do the above more than once, |
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evaluating different instances / types of your cartridges. |
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And the whole other business of little 1 x 1 in Backup |
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(Decide upon frequencies, complete / incremental mix, ...) |
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Otherwise: May the trust into hope never fail you ... |
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Manfred |
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