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o reilly Unix Backup and Recovery phần 2

, tìm thấy một bảng so sánh chi phí tương đối cho mỗi MB của tất cả các tùy chọn khác nhau. Bao gồm các số khó khăn và bất kỳ giấy tờ màu trắng được bao gồm với các sản phẩm đề xuất. Nếu bạn nghĩ rằng nó có liên quan, nhưng có thể quá dài và nhàm chán, đây là nơi để đặt nó. | Technical specifications Go wild. If anyone has made it this far they re either really interested or a true computer techie just like you If this report is the cost justification for a new backup drive find a table that compares the relative cost per MB of all the various options. Include hard numbers and any white papers that are included with the proposed product. If you think it is relevant but possibly too long and boring this is the place to put it. Good Luck The chapters that follow explore in depth the various methods that you may employ to back up your systems. Most of these topics also are covered in documentation from the appropriate vendor this book is not meant to be a replacement for that documentation. I try to explain things that are not covered in the documentation and possibly address some subjects more frankly than a manual provided by the vendor can. Welcome to the world of backups. Page 67 II FREELY AVAILABLE FILESYSTEM BACKUP RECOVERY UTILITIES Part II consists of the following two chapters Chapter 3 Native Backup Recovery Utilities describes the backup utilities that are part of a standard Unix distribution. Chapter 4 Free Backup Utilities discusses additional free utilities that can support a backup recovery plan. Page 69 3 Native Backup Recovery Utilities Native utilities are the backup utilities that you find in a standard Unix distribution. I ll admit that these utilities are rather boring. They do nothing fancy and they have many limitations some of which have been there since they were originally written to back up a PDP-11 to a 9-track tape. In sixth and seventh edition Unix it was still called restor- a throwback to the Multics days. Some of these utilities have bugs that persist to this very day. They ve finally fixed the tape-rewinding bug in dump but only on some Unix versions. Yet these native backup utilities do have a few features that have not been duplicated by commercial backup vendors. These features will always be there and