Hello, Arno Lehmann wrote: > > Hi, > > 13.11.2008 21:58, Dan Langille wrote: >> On Nov 13, 2008, at 11:56 AM, Heitor Medrado de Faria wrote: >> >>> Heitor Faria >>> >>> Dan Langille wrote: >>>> On Nov 13, 2008, at 11:16 AM, Heitor Medrado de Faria wrote: >>>> >>>>> Guys, >>>>> >>>>> This is urgent. >>>>> Is there anyway to restore data on tape after an eof? >>>> I have no idea. >>>> >>>> I would guess that it would require something special to force the >>>> tape drive to read past the EOF. >>>> >>>> This is not something Bacula can do AFAIK. >>>> >> >>> Is there anyway of bscan ignore the eof? >> >> >> Please do not reply at the top. >> >> I do not know. I am quite sure that you cannot force bscan to ignore >> the EOF. >> >> This is not a Bacula issue. This is a tape and tape driver issue from >> what I know. > > Indeed. > > With stupid tape technology - i.e., older ones, and only the ones > without chip memory - you can *try* to position to *before* the EOD > mark, then write a very short block of data, reload the tape, and see > if that was sufficient to overwrite the EOD mark. With luck, you end > up doing this: > > Broken tape layout: > Data Block EOF Data Block EOF EOF The data you want to get at EOF > ^^^|^^^ > tape drives/ drivers interpret this as an EOD mark > After writing: > Data Block EOF Data Block EOF Data unreadable data The data you want > > Then, ignoring read errors, you might be able to access the data you > want to get at. > > Needs lots of luck (which could be less when knowing the exact tape > technology you use, because, for example, the QIC standards specify > how long a file mar is on tape, how long an EOD mark is, and how long > a block of given length is), the right hardware, and afterwards you > might have to further process you read data. > > If you use recent tape technology, I believe there is no way to > achieve what you want. Those tape drives always know where the tape > contents ends, and will not be able to overwrite the EOD mark without > appending a new one. > > A commercial data recovery service might be more helpful. >
You are right, i have got this problem some years ago, and some compagnies have special firmware that are able to do this kind of things. But it cost a *bit* of money... Bye -- View this message in context: http://www.nabble.com/Restore-data-after-eof-tp20488364p20497530.html Sent from the Bacula - Users mailing list archive at Nabble.com. ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
