secondary storage


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secondary storage

[′sek·ən‚der·ē ′stȯr·ij]
(computer science)
Any means of storing and retrieving data external to the main computer itself but accessible to the program.

secondary storage

(storage)
Any non-volatile storage medium that is not directly accessible to the processor. Memory directly accessible to the processor includes main memory, cache and the CPU registers. Secondary storage includes hard drives, magnetic tape, CD-ROM, DVD drives, floppy disks, punch cards and paper tape.

Secondary storage devices are usually accessed via some kind of controller. This contains registers that can be directly accessed by the CPU like main memory ("memory mapped"). Reading and writing these registers can cause the device to perform actions like reading a block of data off a disk or rewinding a tape. See also DMA.

Programs and data stored in secondary storage must first be loaded into main memory before the processor can use them.
References in periodicals archive ?
In such a case, he will use the ILM software to bring the server's file volume down to 50 percent or 60 percent by manually migrating files to the secondary storage server, which accommodates more than 4 million files.
In summary, secondary storage presents new challenges to protect the media, reduce access risk, and further drive down management costs.
There are few applications that, as a rule, have data sets that need to be moved from secondary storage back to primary storage at predetermined times.
Typically, the backup saves files from primary storage to secondary storage on a daily basis.
As Exchange data is automatically migrated based on business values from expensive primary storage to low-cost secondary storage, data storage in the Exchange environment is optimized.
The iQstor iQ2880 can be scaled using the J2880 SBOD expansion enclosure, creating a system with high performance FC drives for primary storage and low cost SATA drives for secondary storage.
What if there was a technology that brought the benefits of RAID to secondary storage, but didn't have the power and cooling overkill of RAID?
If the same disk subsystems were used for secondary storage, an additional 64TB of on-line disk capacity would be required.
Digi-Data Corporation, an innovator and developer of storage solutions for mid-tier, secondary storage and fixed content markets, announces an agreement with JMR Electronics to assume all of its systems business in an OEM deal with the Chatsworth-based enclosure manufacturer.
The secondary storage might be a cheaper online disk array or tape library.
Digi-Data Corporation, an innovator and developer of storage solutions for mid-tier, secondary storage, and fixed content markets, announces that it is recruiting partners to expand its channel program.
For example, moving data out of primary storage (which has not been accessed during so many months) so you can offload your primary storage and migrate that data to a cheaper disk-based secondary storage.