Test by Bikram | Mock GATE | Test 4 | Question: 49

Question

Consider a disk with these parameters:

• Number of surfaces $= 32$
• Number of tracks / surface $= 64$
• Number of sectors / track $= 1024$
• Number of bytes stored in a bit serial manner in a sectors $= 256$

Let the capacity of the disk be $`L'$ MB, and the number of bits required to specify a particular sector in that disk be $`M'$ bits.

The value of $L+5M$, therefore, is __________.

Answer 1

capacity of Disk $=$ $surfaces * tracks/ surface * sectors per track  * Bytes/ sector$

                            = $32 * 64 * 1024 * 256 Bytes$

                            = $2$^$29$ $Bytes$ = $512 MB$

Bits required to specify a sector $=$ $32 * 64 * 1024  $=$ 2$^$21 =$ $21 bits$

$L + 5M = 512 + 5 * 21 = 617$.