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;Jo¥ (:~) ?'Covi.des for backup and recovery of records to protect against infor7I1.afÎon loss; (3) ensures that personnel are trained to safeguard confidential electronic records; (4) minimizes the risk of unauthorized alteration or erasure of electronic records; and (5) documents that similar kinds of records generated and stored electronically are created by the same processes each time and have a standardized retrieval approach. (b) A duplicate copy of esS€ntial records and any software or documentation required to retrieve and read the records must be maintained in a storage area located in a separate building from the building where the records that have been copied are maintained. (c) For all permanent records stored on rewritable electronic media, the system must ensure that read / write privileges are controlled and that an audit trail of rewrites is maintained. §7.76. MAINTENANCE OF ELECTRONIC RECORDS STORAGE MEDIA. (a) State agencies and local governments must ensure that the accuracy, completeness, and accessibility of information are not lost prior to its authorized destruction date because of chan6ing technology or media deterioration, by converting electronic storage media and taking other action as required to provide compatibility with current hardware and software. The migration strategy for upgrading equipment as technology evolves must be documented and include: (1) .periodically recopying to the same electronic media as required, and/ or transferring of data from an obsolete technology to a supportable technology; and (2) providing backward system compatibility to the data in the old system. and/ or èonverting data to media that the system upgra?e and/ or replacement can support. (b) Paragraphs (1) - (3) ofthis subše<:tion outline the maintenance of baekup electronic media stored. offsite, (1) Magnetic computer tapes must be tested and verified no more than 6 months prior to using them to store electronic records. Pretesting of tapes is not required if an automated system is used that monitors read/write errors and there is a procedure in place for correcting errors. (2) The storage areas for electronic media must be maintained within the following temperatures and relative humidities: (A) for ~gnetic media--65 degrees Fahrenheit to 75 degrees Fahrenheit, and 30% to 50% relative humidity; (B) for optical disks-storage environmental conditions as specified in Infarl7lation technol- ogy - 130 mm optical disk cartridge, write once, for information interchange (ISO ¡IEC 9171-1, 1990 or latest revision). (3) A random sample of all magnetic computer tapes must be read annually to identify any loss of data and to discover and correct the causes of data loss. At least a 10% sample or a sample size of 50 magnetic tapes, whichever is less, must be read. Tapes with unrecoverable errors must be replaced and, when possible, lost data must be restored. All other tapes which might have been affected by the same cauS€ 0. e. poor quality tape, high usage, poor environment, improper handling) must be read and corrected. (c) State agencies and local governments must recopy data maintained on electronic media according to the following schedule. (1) Data maintained on magnetic tape must be recopied onto new or used tape a minimum of once ~ Electronic &cards Standards and Proadures : 9 i ~ Suppl. p. 5-19.7