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Englisch.Qxd (Page 1) Backup strategies and tape rotation Three golden rules for backup Why take five? • Tape rotation – don’t use the same cartridge two days in a row! Backup strategies and tape rotation • Offsite copy – store a complete backup offsite! Computer data is „mission critical“ and no company should risk their business because they have not • Every day – a backup’s validity has short duration! 5 day / 4 week rotation, 8 Cartridges taken the necessary precautions to protect their vital data. A proper backup strategy is the most effec- • Four cartridges are assigned for full weekly backups (Cartr. 1, 6, 7, 8) tive insurance against data loss due to the risk of fire, theft, disk crash, natural disaster or human • Four cartridges are assigned for daily differential backups (Cartr. 2-5) error. These events can all cause data loss and result in time consuming data recovery operations. 5 day / 3 week rotation, 5 cartridges rd • Three cartridges for full weekly backup, Each cartridge used every 3 week (Cartr. 1, 4, 5) Cartr. 1 Cartr. 2 Cartr. 3 Cartr.4 Cartr. 5 Full and differential backup • Two cartridges assigned for daily, differential backup Can be combined in several ways. A full backup should always be kept in a safe (off-site) location. In a full backup, all data is copied on the tape. In a differential backup, all data that is changed since the last full backup is copied on the tape. Week 1 MondayTuesday Wednesday Thursday Friday Cartr. 1 Cartr. 2 Cartr. 3 Cartr. 2 Cartr. 3 Backup strategies for the small office Cartr. 6 Cartr. 2 Cartr. 3 Cartr. 4 Cartr. 5 Below are various suggested tape rotation schemes for small office backup. These schemes are showing backup strategies which are acceptable as an absolute minimum. Week 1 MondayTuesday Wednesday Thursday Friday Week 2 Monday Tuesday Wednesday Thursday Friday Cartr. 4 Cartr. 2 Cartr. 3 Cartr. 2 Cartr. 3 Simple 5 day rotation, 5 cartridges Cartr. 7 Cartr. 2 Cartr. 3 Cartr. 4 Cartr. 5 • Five cartridges, each assigned for different days of the week • Full backup each night. Always store the last completed backup off-site overnight. Week 2 Monday Tuesday Wednesday Thursday Friday Monday Tuesday Wednesday Thursday Friday Cartr. 5 Cartr. 2 Cartr. 3 Cartr. 2 Cartr. 3 Week 3 Cartr. 1 Cartr. 2 Cartr. 3 Cartr. 4 Cartr. 5 Cartr. 8 Cartr. 2 Cartr. 3 Cartr.4 Cartr. 5 Week 3 Monday Tuesday Wednesday Thursday Friday MondayTuesday Wednesday Thursday Friday Week 4 Monday Tuesday Wednesday Thursday Friday Differential Differential Differential Differential Full backup Full backup Full backup Full backup Full backup Full Backup Full Backup Differential Differential Differential Differential Backup Backup Backup Backup Backup Backup Backup Backup SLR Cartridge - Technology What is SLR-Technology? Highlights of SLR Cartridge Technology Highlights of SLR Tape Drives SLR (Scalable Linear Recording) - developed and manufactured by TANDBERG DATA • Few moving parts in drive and cartridge ensure high reliability The Tandberg Data SLR™ Tape Drive family offers the industry’s highest reliability - is based on linear technology and adds a new dimension to data cartridge tape dri- • Rigid Aluminum base plate in tape storage management solutions. Designed for the needs of growing storage ves. Large increases in recording speed and capacity are made possible by using mul- • Tape remains completely protected inside the cartridge requirements, they offer unmatched scalability, backward compatibility and tiple write and read channels in parallel for data recording. For surpreme data integrity, • 20 year minimum data retention integration into Tandberg SLR Automation products. SLR technology uses an additional read channel to follow a prerecorded servo-track • Wide temperature and humidity range on the tape. This servo positioning of the recording head ensures data integrity. • Storage capacity up to 140* GB Backward compatibility is one of the special benefits of the SLR technology ensuring • Transfer rates up to 43,2* GB/hr that at least two developed standards can be read without problem. • Annual average field return rate of less than 1,5% • Supported by all a major operating systems and backup software suppliers • Highest reliability in the industry • 30 years experience as tape manufacturer Magnetic Recording Head Motor Drive Puck Tape Belt.
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