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(1) (Hierarchical Storage Management) The automatic movement of files from hard disk to slower, less-expensive storage media. The typical hierarchy is from magnetic disk to optical disc to tape, or from magnetic disk to tape. HSM software constantly monitors hard disk capacity and moves data from one storage level to the next based on age, category and other criteria as specified by the network or system administrator. HSM often includes a system for routine backup as well.

When a file is moved off the hard disk, it is replaced with a small stub file that indicates where the backup file is located.

Tier 0 Storage
Increasingly, solid state drives (SSDs) are used to hold data that are most frequently accessed and are a level higher than the hard disks. Consequently, data may migrate back and forth between the hard disk and SSD before being stored on optical and tape drives. See tape backup, active archiving, demigration and SSD.

Data Migration
This is the data migration path in an HSM system. The advantage of optical and magnetic tape media is that they can be taken off premises for protection against fire and accidents.

(2) (Hardware Security Module) A device that provides strong security for storing root keys for PKI, blockchain and other cryptographic functions. See PKI and cold wallet.

A Very Safe Place
Gemalto's SafeNet Luna HSM provides secure storage for root keys. This unit can be broken up into 100 cyrptographically isolated partitions, each acting as an independent HSM. (Image courtesy of Gemalto NV, www.gemalto.com)
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References in periodicals archive ?
The post Utimaco partners with Bulwark Technologies to deliver HSMs and solutions appeared first on TahawulTech.com.
While we all wait to see if this new "High School Musical 4" and "HSM" TV show actually make it onto our screens, there's plenty of time to rewatch all of the previous movies.
These little 16-1/2" bolt-action carbines are easy to carry in the field, shoot exceptionally well, and with the HSM loads not only give excellent groups but do so without punishing your shoulder.
Utimaco also offers open-payment APIs, empowering vendors with a fully customizable HSM that can adapt to changing industry needs, and can help certify customized firmware solutions.
The holo-strip featured a new machine-readable encryption feature devised by HSM with Bundesdruckerei.
With the new SafeNet Luna SA, cloud companies can provide all of the security, compliance and trust of an on-premises HSM appliance while their customers realise the cost, flexibility and performance benefits of the cloud yet still maintain complete ownership of their keys.
The accomplishment was followed by HSM's sale in the early 1980s to commercial real estate firm Grubb & Ellis, where Miller sat on the board until 1991, when Miller and his father reacquired HSM.
Figure 1(a) shows the structure of the proposed hollow 'H'-shaped metamaterial (HSM), one may consider that the HSM is composed of two oppositely wound 'C'-shaped arms aside and a capacitive gap in the center.
The Honeywell Scanning & Mobility (HSM) facility further extends the company's global presence and provides closer proximity to current customers and prospects in the Middle East.
Honeywell Scanning & Mobility (HSM) is a global leader in automated data collection solutions, including vehicle mount, hand-held and wearable computers, and bar code scanners.
To fill this need, the American Association of State Highway and Transportation Officials (AASHTO) helped develop the Highway Safety Manual (HSM).