We use 5 days for reuse delay.  I did a quick comparison using 25GB and 4GB
volumes on our pilot with the following results:

Disk Volumes - 25 GB Volumes

Stored Data - 236 GB
# of Disk Vols - 14 (including 2 pending volumes)
Total allocation - 14 * 25GB = 350 GB
67% Utilization



Disk Volumes - 4 GB Volumes (TSM2)
Stored Data - 333 GB
# of Disk Vols - 100 (including 12 pending volumes)
Total allocation - 100 * 4GB = 400 GB

83% Utilization

Reclamation was set at 25% for both of these.

It would be interesting to see others peoples results.

Thanks,

Tim Rushforth
City of Winnipeg