> But will this speed up my backups?   Generally speaking, should Bacula be
> able to write two the two tapes devices more quickly than it can write
> to one?  The unit in question is a Tandberg Data StorageLibrary T24 LTO
> with two serial attached scsi LTO4 tape devices, attached to a server
> running Centos 6.2.

It will not speed up a single job since 1 job can not use more than 1
drive however if you have concurrent jobs with spooling and you can
provide enough bandwidth to keep up with the drives it can speed up
multiple jobs. Remember that at 2:1 compression these LTO4 drives
write at 120MB /s each so you will need to have a raid array (raid 0
maybe) or fast SSD for your spool location and this raid probably
should not be on the same drives as your source data.

John

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