1) Consider a disk with a sector size of 1,024 byte, 2000 tracks per surface, 50 sectors per track, 5 double-sided platters, average seek time of 10 milliseconds. Suppose that a file containing 100,000 records of 100 bytes each is to be stored on such a disk and that no record is allowed to span two blocks. Assume the disk rotates at 5400 RPM and one track of data can be transferred per rotation.
a. How many records fit onto a block? (1 block = 1 sector)
b. How many blocks are required to store the entire file? If the file is arranged sequentially on disk, how many surfaces are needed?
c. How many records of 100 bytes each can be stored using this disk?
d. What is the time required to read a file containing 100,000 records of 100 bytes each, sequentially?
2) Assume any record can be read within 10 milliseconds. Consider a database of 16,000,000 records. How long would it take to find a record using
[QUOTE][SIZE=1]Originally posted by r937
homework deadline creeping up on you?
i have attempted it sir just wanna check whether hwta i have done is right or not..pleas emhelp me this time i will not bother u in future...thanking you....this is becos i have various assignments also and i have not to check them properly please help me out.for heaven sake...