> Hi folks,
> We're looking at a Quantum DLT 4500 (DLT drive with a five-tape
> autoloader) to hang off a Linux box, for backups on a bunch of UN*X
> machines here. I know that a regular DLT drive will work, but the
> vendor wasn't sure that drivers for the autoloader exist for Linux.
> Does anyone have insight into whether a Quantum 4500 will exist
> happily on a Linux box? Have you done this? Was there anything
> special you needed to do?
We use such DLT A.L.s on Solaris and DEC Unix (haven't tried Linux
yet). We have never needed any programs other than basic mt commands
and have not had any problems. Basically the A.L. will advance when it
is given an ``offline'' message. Like:
mt -f /dev/whatever rewoffl
will rewind the current DLT, offline it, and switch to the next in the
stack. If the current DLT is already the last one then it will just
rewind and offline it.
To do this in C code we used (for Solaris) the mtio(7) api. I can't
find this documented on my Linux system but if you get the source for
GNU's `mt' it should be pretty obvious how to write custom code (this
is what I did to figure out how to talk to the DLTs on Solaris).
Unfortunately, all this lets you do is advance the DLT stack. This is
enough for us, but maybe not for you. To random access a DLT in the
A.L.'s stack as well as doing the claimed 45 sec random access of data
on a particular DLT you DO need special drivers. This I have no
information on, but am interested in (for Linux as well as other
But for straight dump/read to/from DLT1 then DLT2 then DLT3 .... No