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CS609 Current Final Term Fall 2013 Shared by Irum_MCS File 1



Objective 20 % from moaaz file and subjective 30 %
 Q: what is differenc between tracks and sectors:
Q: Write disadvantages and advantages of  FAT32:
 Q:How disk scan identify the bad sectors?
Answer:-  • It attempts to write a block. • After write it reads back the block contents. • Performs the CRC test on data read back. • If there is an error then the data on that block is not stable the cluster of that block should be marked bad. • The cluster is marked bad by placing the appropriate code for bad cluster so that they may not be allocated to any file.
 Q) Write down a procedure to convert the cluster number into sector number?
Q# Suppose a disk is divided into two partition and we have read MBR at LBA=0 to get information about primary partition a) How many bytes of code part we need to skip to get information about primary partition? b) How many bytes of code part we need to read information?
Q# Write down procedure to convert a cluster number into sector number
Answer:-  NTFS simply the following formula will be used to translate the sector number into cluster number. Sector # = Cluster # * Sector Per Cluster
 Q: In FAT32, what is the size of FSInfo?
Answer:- On a FAT32 volume, the FAT can be a large data structure, unlike on FAT16 where it is limited to a maximum of 128K worth of sectors and FAT12 where it is limited to a maximum of 6K worth of sectors.

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