TAILIEUCHUNG - Chapter-11-Disks

One of the most important parts of running any computer system is handling data on disk. We have already looked at UNIX file handling in Chapter 10. In this chapter, we’ll look at two ways to add another disk to your system, and what you should put on them. In addition, we’ll discuss disk error recovery on page 218. | 2 April 2003 17 00 47 The Complete FreeBSD page 199 In this chapter Adding a hard disk Using sysinstall Doing it the hard way Creating file systems Moving file systems Recovering from disk data errors Disks One of the most important parts of running any computer system is handling data on disk. We have already looked at UNIX file handling in Chapter 10. In this chapter we ll look at two ways to add another disk to your system and what you should put on them. In addition we ll discuss disk error recovery on page 218. Adding a hard disk When you installed FreeBSD you created file systems on at least one hard disk. At a later point you may want to install additional drives. There are two ways to do this with sysinstall and with the traditional UNIX command-line utilities. There was a time when it was dangerous to use sysinstall after the system had been installed there was a significant chance of shooting yourself in the foot. There s always a chance of doing something wrong when initializing disks but sysinstall has become a lot better and now it s the tool of choice. It s good to know the alternatives though. In this section we ll look at sysinstall and on page 209 we ll see how to do it manually if sysinstall won t cooperate. We ve been through all the details of disk layout and slices and partitions in Chapter 2 so I won t repeat them here. Basically to add a new disk to the system you need to Install the disk physically. This usually involves power cycling the machine. Barely possibly format the disk. Without exception modern disks come preformatted and you only need to format a disk if it has defects or if it s ancient. In many cases the so-called format program doesn t really format at all. v 2003 04 02 06 44 17 199 2 April 2003 17 00 47 The Complete FreeBSD . tools page 200 Adding a hard disk 200 If you want to share with other operating systems create a PC style partition table on the disk. We looked at the concepts on page 63.

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