Logical I/O

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1. Coming soon.

(Source: Business Continuity Management Institute - BCM Institute)

2. A read or write request by a program. That request may, or may not, necessitate a physical IO. For example, on a read request the required record may already be in a memory buffer and therefore a physical I0 is not necessary. (Source: OGC, Information Technology Infrastructure Library (ITIL) v3)