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Design a backup strategy for a computer system. One option is to use plug-in external disks, which cost $150 for each 500 GB drive. Another option is to buy a tape drive for $2500, and 400 GB tapes for $50 apiece. (These were realistic prices in 2008.) A typi- cal backup strategy is to have two sets of backup media onsite, with backups alter- nately written on them so in case the system fails while making a backup, the previous version is still intact. There's also a third set kept offsite, with the offsite set periodi- cally swapped with an on-site set. a. Assume you have 1 TB (1000 GB) of data to back up. How much would a disk backup system cost? b. c. How much would a tape backup system cost for 1 TB? How large would each backup have to be in order for a tape strategy to be less expensive?

Design a backup strategy for a computer system. One option is to use plug-in external disks, which cost $150 for each 500 GB drive. Another option is to buy a tape drive for $2500, and 400 GB tapes for $50 apiece. (These were realistic prices in 2008.) A typi- cal backup strategy is to have two sets of backup media onsite, with backups alter- nately written on them so in case the system fails while making a backup, the previous version is still intact. There's also a third set kept offsite, with the offsite set periodi- cally swapped with an on-site set. a. Assume you have 1 TB (1000 GB) of data to back up. How much would a disk backup system cost? b. c. How much would a tape backup system cost for 1 TB? How large would each backup have to be in order for a tape strategy to be less expensive?

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Design a backup strategy for a computer system. One option is to use plug-in external disks, which cost $150 for each 500 GB drive. Another option is to buy a tape drive for $2500, and 400 GB tapes for $50 apiece. (These were realistic prices in 2008.) A typi- cal backup strategy is to have two sets of backup media onsite, with backups alter- nately written on them so in case the system fails while making a backup, the previous version is still intact. There's also a third set kept offsite, with the offsite set periodi- cally swapped with an on-site set. a. Assume you have 1 TB (1000 GB) of data to back up. How much would a disk backup system cost? b. How much would a tape backup system cost for 1 TB? c. How large would each backup have to be in order for a tape strategy to be less expensive?
Transcribed Image Text:Design a backup strategy for a computer system. One option is to use plug-in external disks, which cost $150 for each 500 GB drive. Another option is to buy a tape drive for $2500, and 400 GB tapes for $50 apiece. (These were realistic prices in 2008.) A typi- cal backup strategy is to have two sets of backup media onsite, with backups alter- nately written on them so in case the system fails while making a backup, the previous version is still intact. There's also a third set kept offsite, with the offsite set periodi- cally swapped with an on-site set. a. Assume you have 1 TB (1000 GB) of data to back up. How much would a disk backup system cost? b. How much would a tape backup system cost for 1 TB? c. How large would each backup have to be in order for a tape strategy to be less expensive?
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