On 21/09, Mehdi Salehi wrote: > Hi, > What is actually the different between a disk pool and a file pool? Both are > based on disks and the latter behaves sequentially like tapes. What makes > necessary to have these two types of pools in TSM? Couldn't IBM eliminate > one of them and say that there is only one disk-based pool? > > Thanks
DISK storage pools are prone to fragmentation which FILE stgpools are not (if you pre-allocate volumes). DISK storagepools are therefore used as intermediary storage whereas FILE stgpools are more of a replacement for tape to mitigate tape mount times and number of mount points, think VTL. I would hazard a guess that architectural differences are described more in detail in a redbook, maybe the TSM concepts guide or the TSM technical guide. -km
