apple-pascal-1.3-manual

ExamplePrompt: Bad block scan of what volume ?Response: APPLE3:Prompt:Scan 280 blocks ? In response you will normally type v for Yes, telling the Filer you want toscan the entire disk. If you wish to check only a smaller portion of the disk(a very unusual case), type N and you will be asked to type the number ofblocks you want the Filer to scan. Because the number of blocks to scandepends on the type of storage device in use, check the number of blocksavailable on your disk. If your system gives a message other than 280blocks, the disk's directory is either damaged or missing, or you have ahigher-capacity disk or rigid disk.Once the system knows how many blocks to check, it goes ahead andchecks each block on the indicated disk for errors, and lists the blocknumber of each bad block. In most instances you will see the message!! bad blockCs)after the bad-blocks scan has been completed. If the disk has bad blocks thedisk drive will buzz and clatter, and you will see a message similar to this:Scan 28il blocks ? CY /tD yBlock 23 is badBlock 24 is badBlock 25 is bad3 bad blocksFile(s) endangered:THISFILE.TEXT 18 24THATFILE.CODE 25 29The last two lines tell you that the three bad blocks are contained partly inthe file THISFILE.TEXT, which is stored in blocks 18 through 24, and partlyin the file THATFILE.CODE, which occupies blocks 25 through 29.The system always asks you if you want to continue the scan after it hasfound three bad blocks. Then, it asks you if you want to continue afterevery 9th bad block (for example, after the 9th bad block, the 18th, the27th, and so on). Blocks reported as bad can often be fixed by using theExamine command. Those that cannot be fixed can be marked so that theyare not used. See the discussion of the Examine command, which follows.11-66Chapter 3: The Filer