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Backup of Data Print
August 2006

Data storage is getting increasingly bigger and bigger because there are more data and information to be stored and multimedia files are normally 40 times bigger than text files. Storage devices have become cheaper and cheaper over time and the reduced price has propelled the indiscrimination of data storage.  The trend will just continue and eventually pose a new challenge to information system management.  The cost of backing up will rise faster than the cost of storage and the effectiveness of back up will impose a serious challenge to the continuity of operation of the information system.   The first question to address is the type of data, information and files to back up.  This depends on the value of the data.  If it is the customer's bank account transaction record, no doubt the data is the bank's most valuable asset and it has to be backed up with 300 or 400% redundancy to ensure its availability to be Five Nines (99.99999%).  If the record is the day's work of the students of a 1400 student school, the school management has to set a value on it and decide the level of its availability assurance.  The second issue is the currency of back up data and this refers to the frequency of back up.  The third issue is the choice of back up device and the storage of the back up.  Some people use USB pen drives, some use DVD Rom, some use swappable hard disks, and serious organisations still use tape drives that are seen as ultra expensive from a hardware perspective. The fourth issue is the execution of the above decisions.  Many commercial software packages are available to automate the back up operation. While a recommendation is not in place here, we are happy to provide hints and assistance on using a Windows based system without paying an extra price - NTBACKUP. Please see slides attached.

pdf 2006-08_sbs2003_backup 385.92 Kb