Journey of byte

Journey of byte

Step 1: Whenever user tries to open file in system or save file; application manger sends request to file manger.
Step 2: The file manger handovers the request to I/O manager.
Step 3: The I/O manger handovers the request to disk manager.
Step 4: Disk manger reads the contents of disk and fillis into buffer and handover back to I/O. I/O to file  manger. File manager to application. Finally Application shows the file contents.
Step 5: Disk manager reads contents from sector. sector is set of bytes. And file is not stored into continues sectors. Read write head is responsible to read or write contents from the disc so read write head has to identify starting of the sector and ending of the sector. After reading or writing contents into sector it has to identify sector ending so it is required some time. As well it has to identify next sector staring this also required some time. So while storing file contents into disc; it writes contents into first sector and leaves some sectors and it writes; it continues like that. So one spindle of the disc it reads or writes into multiple sectors.

Each sector contains the information about ending of the sector and next sector starting.