Support of backup volumes with size  more than 4Gb
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                 Key: CORE-3575
                 URL: http://tracker.firebirdsql.org/browse/CORE-3575
             Project: Firebird Core
          Issue Type: Bug
    Affects Versions: 2.5.0
         Environment: All
            Reporter: Alexey Kovyazin


There is a bug in gbak implementation of backup process with volumes.
According to Firebird implementation, it sgould be not possible to create 
volume of backup with explicitly specified size which is more than 4gb.
Bug is in the following behaviour - if there will be set size which more than 
4Gb and reminder of its division by 4 is not 0, backup volume will be created 
with remainder's size.
Example:
gbak -b -user SYSDBA -pass masterkey database.fdb vol1.fbk 41g vol2.fbk 

vol1.fbk will be 1Gb in size, and rest is in vol2.fbk.

What should be done:
1) Wrong behaviour should be fixed (probably backported?) so it should not be 
possible to specify more than 4Gb size
2) In the future version implement support of bigger volumes, because 4Gb is 
obviously outdated limitation.






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