IEC 62435-3-2020 Electronic components – Long-term storage of electronic semiconductor devices – Part 3: Data

IEC 62435-3-2020 Electronic components – Long-term storage of electronic semiconductor devices – Part 3: Data. The data archive is generally stored on any medium, which may include non-volatile memory, optical disk or storage in redundant array disk servers. It is important to ensure the environment for media storage is low risk for degradation, and accidental or random events that could destroy or corrupt the data. The value of the parts is highly dependent upon the data without which the company might cease to function. See Table A.1 for critical data storage considerations. The physical and cyber security of the archive store are not mentioned further here, but should be a main consideration when planning its location and access. 4.2 Data storage options From the early 1 960s onwards, media for storing data other than paper, have historically evolved towards magnetic, optical and other forms of solid-state media. It is common practice to ensure redundancy of storage within storage servers, across physical sites and geographies. Redundant array storage enables periodic back-up copies and checks to ensure longevity. Some printed data is effectively undecipherable without computer assistance (such as bar codes or matrix marks). It is conceivable to store enough information in the optical markings to satisfy business requirements for traceability. Similarly, printed data may be recovered from paper or from the part using optical character recognition and associated software. Other legacy storage media, such as microfiche, can also be in use. 4.3 Paper data storage concerns Paper storage with the components being stored is subject to many hazards that can be mitigated with regular intervention. Data and information stored on paper can be corrupted by aging of ink, moisture or water exposure or simple loss of the physical paper record and/or it’s facsimile. It is recommended that the stored paper be acid free to minimize the risk of brittle degradation. The permanence of the printed mark on the archival paper should also be considered for long-term storage of paper with components. 4.4 Electronic data storage concerns Careful selection of the electronic medium is required, as there are many hazards in relying on this media that are not instantly apparent. It shall be remembered that data to be archived shall be retrievable, otherwise the purpose of archiving is negated. Data redundancy can be achieved by redundant array of independent disks (RAID) at a local or remote network host. Similarly redundant optical storage...