Download Tandberg Data Cartridge SLR5, 4GB

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