File System Flashcards
(32 cards)
What is the disk called in an HDD?
A Platter
What are HDD platters bound together around?
Spindle
What is at the end of a HDD arm?
Disk Read/Write head
Each partition of an HDD is given what kind of name?
Drive Letter, ex. C:
How many bytes are in a sector?
512 bytes
Groups of sectors together
Cluster
The smallest physical storage unit on a disk
Sector
The smallest amount of disk space that can be allocated to hold a file.
Cluster
The time to move the disk arm to the cylinder.
Seek time
The time for the desired sector to rotate to the disk head.
Rotational Latency
4 algorithms for disk scheduling.
1) First come, first served
2) Shortest seek time
3) Elevator (scan)
4) Shortest Positioning Time First
What does a file system do?
Controls how data is stored and retrieved to mass storage devices.
3-part architecture of the file system.
1) Logical
2) Physical
3) Virtual
The file system architecture that is presented to the application programmer or user.
Logical File System
The code that talks to the hardware in a file system.
Physical File System
Which part of the file system architecture deals with device organization and disk scheduling algorithms?
Physical File System
The architecture of the file system responsible for bringing together the physical and logical.
Virtual File System
What is a file?
Linear array of bytes with a name and a FCB or inode number associated.
What is a directory?
A list of pairs of file names and low-level names.
Information about a file’s format and organization stored in a file header, only visible to the file-system.
Metadata
Non human-readable name for a file
Magic number, or Identifier
Determines which applications are allowed to access and interpret a file
File type
File type is identified using:
File extension
The topmost directory
Root Directory
