Re: [Dar-support] backing up directly to tape
For full, incremental, compressed and encrypted backups or archives
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From: Denis C. <dar...@fr...> - 2015-02-21 09:41:30
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 21/02/2015 08:28, Gour wrote: > Denis Corbin <dar...@fr...> writes: [...] > > I did try with dar_split, but when dar filled the first tape, it > was spitting "I/O errors" on the console while I was waiting the > tape to rewind and replace with the 2nd one. right, It was less than 1 hour development with very little testing, I might consider better user interaction than just waiting 5 second to retry, better pause and wait for user to tell dar_split to continue... > > After that, dar continued with writing, but I wonder if everything > was OK. > > The problem is that I simply do not have enough space on my regular > HD, to perform the whole backup and then try to restore and check > if everything is OK. You don't need to restore to check if everything is OK, just testing the archive is enough for that: all the data reading, CRC checking, archive layout coherence is done, just sending the read data to a black hole in place or restoring it to filesystem. dar_split < /dev/tape | dar -t - --sequential-read > > However, today I might try to devise a backup which fills just a > little bit over one tape - iow. using two tapes - and then try to > restore. > [...] > Well, using dar with tapes is just temporary solution until I > acquire RDX which will be, I hope very soon, but, as you wrote > above, it seems that dar is definetely more suitable for disks, > while tapes are, maybe, better left to Amanda/Bacula/etc. Probably yes, I don't know much other backup tools... :-) > > However, I plan to deploy par2 usage 'cause it looks the price is > not too big. :) > > > > Sincerely, Gour > > Cheers, Denis. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQIVAwUBVOhSwQgxsL0D2LGCAQJ62hAAog4NACkX9P50mOz3cc4oTKbPTDNbLPeK nN7qeYIKSi3Q9VSvrzoKzQjYmmC7+RNyuu2pwfYwN9kIO/MgtClq70USDPCOsSNf VefqHsHQNB08K8UaoYMFaMzew/aDzSrMn2S+5xfbq+HojIw3tY6WaEkMggjzSsyf t9Qe7LNaeHgRXrCEuOniID2uSYjIk23ujPPBILv0FIHu2vkfnQ4jzL3Ji3OvTcev 2ktevYUe8zCkv3V/+WpXRr2WkY4J5xev4vdxHVUsc2oNVx5Hf63VkEvdE9O+6MUJ FDIEqIunf6upI/O6fcDj/r+fhO4yKFnVruHqEHukJe4t04oxdXaB0vDC9daX9gTs sblgFdhRq3053YvijG2OwltU9rT438IzmSNWRZXtvbBWlqOnBNgss+5WmpACdtrR vJ6dP+DkCoAtPfu+NQHd7Q1yBNXzu9loHG2Yo478tSsmIb6QAPQWRroaBJxDER8J lTvz1Dpjahs9s5KsyRKlHrReqGT36mCKzkbYZIyg7VIkAbRHj+OGhu1iAT4hZv5t k/3SEhBEHMlMQk+/ZkEGT8tEFoxAsseZO9eMR28s/KGKSOIod/po3O4F9UneUbw9 zJHAIFAouslNgMDdNeG1gmgbaOyfchwEwMNjy/PPhKWl1GTwsm/7LxaR3uevci3h ZY11zv+Go20= =jWJq -----END PGP SIGNATURE----- |