Data Management and Publishing

Backups and Security

Backups

Keeping reliable backups is an integral part of data management. Your personal computer, external hard drives, departmental or university servers are examples of tools used for backing up data. CDs or DVDs are not recommended bcause they fail so frequently. The UK Data Archive provides additional guidelines on data storage, back-up, and security.

Backup Your Data

• Make 3 copies (e.g. original + external/local + external/remote)
• Have them geographically distributed (local vs. remote depends on recovery time needed)

Data Backup Options

• Hard drive (examples: via Vista backup, Mac Timeline, UNIX rsync)
• Tape backup system
• MIT’s TSM service (Basic is free, up to 15 Gb; Enterprise has a fee, and provides up to 10Tb, includes an off-site copy)
• Cloud Storage - some examples of private sector storage resources include:
  • Amazon S3 -Requires client software, no encryption support (http://aws.amazon.com/s3/#pricing)
  • S3-based Remote Hard Drive Services such as Elephant Drive (www.elephantdrive.com) and Jungle Disk (www.jungledisk.com)
  • Mozy (from EMC) Free client software, 448-bit Blowfish encryption or AES key (http:// mozy.com/)
  • Carbonite Free client software, 1024Free 1024-bit Blowfish encryption (www.carbonite.com)

Secure Your Data

• Unencrypted is ideal for storing your data because it will make it most easily read by you and others in the future. But if you do need to encrypt your data because its sensitivity:
  • Keep passwords and keys on paper (2 copies), and in a PGP (pretty good privacy) encrypted digital file
  • Don’t rely on 3rd party encryption alone

• Uncompressed is also ideal for storage, but if you need to do so to conserve space, limit compression to your 3rd backup copy

Test your backup system