Thank Richard,

But what is the algorythm used by TSM ?

Pierre

> -----Message d'origine-----
> De : ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] De 
> la part de Richard Sims
> Envoyé : jeudi 23 août 2007 14:51
> À : ADSM-L AT VM.MARIST DOT EDU
> Objet : Re: [ADSM-L] How does a library choose a drive?
> 
> On Aug 23, 2007, at 5:36 AM, CAYE PIERRE wrote:
> 
> > BUT when doing recurent task, as backup and so, TSM SEEMS to act as 
> > Richard explain, asking the OS for a drive, so it's the OS 
> which make 
> > the choice, based on it own algorythm.
> 
> TSM performs I/O through operating systems services, but that 
> is not to say that the operating system makes choices.  In 
> the case of Unix, TSM performs an ioctl() system call with an 
> appropriate "mount"
> directive to cause the mount of a specific tape on a specific drive.
> This is deterministic, with TSM choosing the drive to use.
> 
>     Richard Sims
>