What is Hierarchical Storage Management?
Hierarchical storage management or HSM is a storage system that automatically moves data between tiered storage devices depending on performance requirements. Faster storage devices such as hard disc drives are more expensive to utilise than slower devices such as SATA or magnetic tape drives. HSM organises storage by identifying inactive, rarely used and frequently used data and filing it accordingly, with the highest demand files being stored on faster devices and the least accessed files being archived on slower devices.
HSM provides businesses with a more economical storage system moving the bulk of data onto more affordable devices and prioritising high use data on hard drives, improving productivity, and device utilisation.
How do HSM systems work?
HSM systems work by continuously monitoring the way a company uses its data and automatically migrating and retrieving files according to need. It works as part of a data backup and archiving policy and is set up to identify aging and inactive files and move them onto slower storage devices while keeping in-use files on faster devices.
The user accesses all files in the same way, without having to switch between devices, as the system automatically migrates information onto faster devices when required so all information appears to be immediately available and accessible, regardless of where it is stored.