Quote from the admin guide (Managing Storage Pools and Volumes):

When collocation at the client node level is enabled for a storage
pool (COLLOCATION=YES) and a client node backs up, archives,
or migrates files to the storage pool, the server attempts to select a
volume using the following selection order:
1. A volume that already contains files from the same client node
2. An empty predefined volume
3. An empty scratch volume
4. A volume with the most available free space among volumes that
already contain data

So - you're almost right - but Node 5 will pick the emptiest volume, not
necessarily Tape1.
Hope this helps.

> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]On
> Behalf Of Robert Ouzen
> Sent: Tuesday, August 28, 2001 3:03 AM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Question about Maxscratch (Collocate/No Collocate)
>
>
> Hi
>
> For example I have two storage pools A and B  with:
>
>  A with nodes=12 maxscratch=4 collocate=yes
>  B with nodes=10 maxscratch=3 collocate=no
>
> My question is about the order of filling the tapes. As I understand
>
> For Storage Pool A :    Tape1   Node1      (Scratch 1)
>                                    Tape2   Node2       (Scratch2)
>                                    Tape3   Node3       (Scratch3)
>                                    Tape4   Node4       (Scratch4)
> No more scratch tape (maxscratch=4). Now the next node5 will be
> on Tape1 and
> node6 on Tape2  etc ........ till nodes12
> The next backup of  node1 will be on Tape1  etc .....
>
>
> For Storage Pool B:  Tape1 Node1 TO Node10   (scratch 1) till full then
> Tape2 etc .....
>
> Did I understand right ???????????????
>
> T.I.A  Regards  Robert Ouzen
> E-Mail: rouzen AT univ.haifa.ac DOT il
>