Grade Eight Quarter 2_Week 3_Day 3_CSS.pptx

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1. Disk Management Q2_W3_D3 Randy M. Garay Subject Teacher

2. CONTENTS  Overview of disk management  Difference between a disc & a disk  Disk terminology  Disk Structure  Disk Scheduling  Disk Operations  Disk management tools

3. Compact Disk Hard Disc Drive What’s wrong with this picture?

4. Compact Disk Hard Disc Drive What’s wrong with this picture? Compact Disc Hard Disk Drive

5. What's the difference between a "disc" and a "disk “? Discs Disks -refers to optical media, such as an audio CD, CDROM, DVD-ROM, DVD-RAM, or DVD-Video disc. - are removable, meaning when you unmount or eject the disc from your desktop, it physically comes out of your computer. -refers to magnetic media, such as a floppy disk, the disk in your computer's hard drive, an external hard drive. Disks are usually sealed inside a metal or plastic casing (often, a disk and its enclosing mechanism are collectively known as a "hard drive").

6. What is Disk Management ? Disk Management is a Microsoft Windows utility first introduced in Windows XP as a replacement for the fdisk command. It enables users to view and manage the disk drives installed in their computer and the partitions associated with those drives. As can be seen in the picture below, each drive is displayed followed by the layout, type, filesystem, status, capacity, free space, % free, and fault tolerance.

7. Master Boot Record (MBR) -the information in the first sector of any hard disk that identifies how and where an operating system is located so that it can be loaded into the computer's main storage or random access memory. MBR does have its limitations, only works with disks up to 2 TB in size. DISK TYPES:

8. 2. Global Partition Table (GPT) -newer standard that’s gradually replacing MBR. -associated with UEFI. -It’s called GUID Partition Table because every partition on your drive has a “globally unique identifier. DISK TYPES:

9. 3. Virtual Hard Disk (VHD) -a disk image file format for storing the complete contents of a hard drive. -disk image, sometimes called a virtual machine, replicates an existing hard drive and includes all data and structural elements. DISK TYPES:

10. 4. Basic Disk -physical disk that contains primary partitions, extended partitions, or logical drives. -can be accessed by all versions of Windows, MS-DOS, and Windows NT. -can contain up to four primary partitions, or three primary partitions and an extended partition with multiple logical drives. DISK TYPES:

11. Disk Terminology It is the sum set of tracks that have the same track value of all discs. Also referred to as group of tracks with same radius REDYLINC CYLINDER

12. Disk Terminology It is a circular path on the surface of disk or diskette on which information is magnetically recorded and from which recorded information is read. KARTC TRACK

13. Disk Terminology It is a subdivision of a track on a magnetic disk or optical disk. Each stores a fixed amount of user accessible data. SCROTE SECTOR

14. Disk Structure

15. Disk Performance Parameters  Seek Time  The time it takes to move the disk arm to the required cylinder  Rotational Latency  The time it takes for the disk to rotate so that the required sector is above the hard disk • Access Time  The time it takes to get in position to read or write.  Seek time + Rotational Latency • Time to get the data Access Time + Transfer time

16. How to partition hard disk

17. Directions: Write a reflection of your learning journey about this lesson using the guide phrases below. I have learned that____________________________ I have realized that___________________________ 3. I will apply___________________________________