[CentOS] Tape drive throughput

Fri Jun 9 20:40:14 UTC 2006
Charles Lacroix <clacroix at cegep-ste-foy.qc.ca>

On Friday 09 June 2006 16:35, Rodrigo Barbosa wrote:
> On Fri, Jun 09, 2006 at 04:15:38PM -0400, Bowie Bailey wrote:
> > Rodrigo Barbosa wrote:
> > > On Fri, Jun 09, 2006 at 03:56:36PM -0400, Bowie Bailey wrote:
> > > > I have a backup spooling onto a DLT drive.  Is there any tool that
> > > > will let me monitor the data throughput on the device?
> > >
> > > Throughput on a tape drive is very variable, depending on how you are
> > > writing/reading the data to it.
> > >
> > > So for some meaningful numbers, you would need your backup solution
> > > to provide them.
> >
> > I'm just looking for raw bps flowing to the device.  I don't really
> > care about compression and such at the moment, I just want a rough
> > idea of what the drive is doing.
>
> There is no such thing. You "raw bps" will vary greatly depending on
> your blocksize and other factors.

I know this won't help you much but just assume that tapes are very slow ...