ISO IEC 29121:2021 pdf download – Information technology — Digitally recorded media for information interchange and storage — Data migration method for optical disks for long-term data storage.
1 Scope This document specifies the data migration method for DVD-R, DVD-RW, DVD-RAM, +R, +RW, CD-R, CD- RW, BD Recordable and BD Rewritable disks for long-term data storage. By applying this document for information storage, digital data can be migrated to a next new disk without loss from the present disk if data errors are completely corrected before and during the migration and provided copying of the data is allowed. This document specifies: — a data migration method for long-term data storage; — test methods for measuring maximum data error, including ambient condition, test area, test drive, disk preparation and test execution; — an initial performance test and a periodic performance test that check an error rate of data recorded on the disks with categorized maximum data error tables; — precautions to reduce the possibility of deterioration in order to assure the integrity of the disks during their use, storage, handling or transportation; and — the estimated lifetime of B mig performance test. (B 0,000 1 ) life to determine the test interval for the periodic 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO/IEC 16963, Information technology — Digitally recorded media for information interchange and storage — Test method for the estimation of lifetime of optical disks for long-term data storage 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — IEC Electropedia: available at http://www.electropedia .org/ — ISO Online browsing platform: available at https://www.iso .org/obp 3.1 B mig life lifetime (3.9) for use of data migration (3.5) and identical to B 0.000 1 life which is 0,000 001 quantile of the lifetime distribution (i.e. 0,000 1 % failure time) or 99,999 9 % survival lifetime Note 1 to entry: See Annex E .
3.2 B 5 life 5 percentile of the lifetime (3.9) distribution (i.e. 5 % failure time) or 95 % survival lifetime [SOURCE: ISO/IEC 16963:2017, 3.4] 3.3 (B 5 life) L 95 % lower confidence bound of B 5 life (3.2) [SOURCE: ISO/IEC 16963:2017, 3.5] 3.4 B 50 life 50 percentile of the lifetime (3.9) distribution (i.e. 50 % failure time) or 50 % survival lifetime [SOURCE: ISO/IEC 16963:2017, 3.6] 3.5 data migration process to copy data from one storage device or medium to another 3.6 error correction code ECC mathematical computation yielding check bytes used for the detection and correction of errors in data Note 1 to entry: For DVD-R, DVD-RW, DVD-RAM, +R and +RW disks, the Reed-Solomon product code defined in ISO/IEC 16448 for DVD-ROM systems is applied. For BD recordable and BD rewritable disks, the long-distance code (LDC) + burst-indicating subcode (BIS) defined in ISO/IEC 30190, ISO/IEC 30191, ISO/IEC 30192 and ISO/IEC 30193 is applied. For CD-R and CD-RW disks, the cross interleaved Reed-Solomon code (CIRC) and the Reed-Solomon Product-like Code (RSPC) defined in ISO/IEC 10149 are applied.
ISO IEC 29121:2021 pdf download – Information technology — Digitally recorded media for information interchange and storage — Data migration method for optical disks for long-term data storage
