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-⁠E[XPAND]

Do not apply RLE compression on backup data.

Normally, gbak will compress the output file.This switch prevents that compression from taking place.

This is a very basic RLE compression with a low compression rate, for better compression, use [gbak-cmdline-zip].

-⁠FA[CTOR]

Blocking factor.

Syntax
-FA[CTOR] block-size

If backing up to a physical tape device, this switch lets you specify the tape’s blocking factor.

-⁠G[ARBAGE_COLLECT]

Disable garbage collection.

This switch prevents Firebird’s garbage collection from taking place while gbak is running.Normally gbak connects to the database as any other connection would and garbage collection runs normally.Using this switch prevents garbage collection from running during the course of the backup.This can help speed up the backup.

-⁠IG[NORE]

Ignore bad checksums.

This switch causes gbak to ignore bad checksums in the database.This can be used to attempt to backup a database that failed due to checksum errors.There is no guarantee that the data will be usable though, so it is best to take other precautions to preserve your data.