Tôi biết một số người có quan Made quyết định của họ về việc sao lưu các máy tính dựa trên phần cứng hay phần mềm gì họ đã sở hữu. những người khác | Chapter 10 Choose Your Backup Hardware 129 Final Thoughts on Optical Drives I believe the best backup strategy requires the least manual effort. Because optical media tend to require a lot of manual effort and because they do not provide you with a bootable backup they re less than ideal. However if you ve just spent your entire savings on a new iMac and you can t possibly spring for even a single external hard drive backing up onto optical media is vastly better than not backing up at all. Just keep these thoughts in mind For minimum inconvenience use the highest-capacity discs your drive supports . DVD rather than CD . If saving money is paramount use rewritable media DVD-RW or DVD RW if your drive and software support it. Because incremental duplicates are impossible with optical media plan on making a duplicate just once a month. Magneto-Optical Disks Several different manufacturers offer magneto-optical MO drives and disks ranging in capacity from 128 MB to GB. Some of these are write-once like CD-Rs the acronym WORM for Write Once Read Many applies to such disks and drives others are rewritable like CD-RWs and can be erased. The primary advantage of MO technology over CDs and DVDs is longevity MO media is typically rated for long-term archival storage on the order of 100 years. On the other hand MO media is extremely expensive as are the drives themselves. The mechanisms are considerably slower than conventional optical drives. And MO media comes in many different formats and sizes once you choose a media type your future options may be limited. The latest development in MO is called UDO Ultra-Density Optical with disks that can hold as much as 30 GB each. If regular MO drives and media are expensive UDO is out of this world plan on spending about 4000 for a low-end drive plus upwards of 60 for a single rewritable cartridge. Prepared for Apple Consultants Network Partners. Real World Mac Maintenance and Backups by Joe Kissell. Copyright 2007. Used with
