Overview of Storage Devices
What is the capacity of a CD?
700 Megabytes (MB) capacity.
What do the following abbreviations stand for? CD-RW DVD-R/RW DVD-R DL BD-R BD-RE
Compact Disk ReWritable Digital Versatile Disk Read and Rewritable Digital Versatile Disk Read and Rewritable Dual Layer Blu-Ray Disk Recordable Blu-Ray disk Recordable Erasable
What is a hard drive cylinder?
Conceptually a hard drive has several platters with a shaft that runs through them. This design is called the "cylinder".
What is a master boot record (MBR)?
First sector of a hard drive (usually 512 bytes).
What are the tree Hard Disk Drives (HDD) connections?
SATA, PATA, and SCSI.
How do optical disks read and store data?
Series of small bumps read with a laser beam (microscopic binary storage)
What is a cluster?
Several sectors that are physically touching. A cluster of sectors.
What is a sector?
Smallest physical storage unit on the disk (usually 512 bytes).
What is an SSD Hard drive?
Solid State Drives. No platter or moving parts. All memory inside device. Very Fast. Expensive.
What does an MBR contain?
Table of primary partitions (primary parts) Disk signature (helps find disk) Directions for starting the operating system.
How do home writing of optical media work?
"Burners" don't create bumps. Burners darken photosensitive dye to represent data.
What are rotational speeds of hard drive?
4,800 rpms (rotations per minute) (slowest) 6.25 ms (milliseconds) latency.
What is the capacity of a DVD?
4.7 gigabytes for single-layer 8.5 gigabytes for dual-layer
What does CD stand for?
CD (Compact Disk)
What is an optical format?
CD, DVD, Blu-ray
What is the capacity of a Blu-Ray disc?
25 GB for single-layer 50 GB for dual-layer
How much information can a Floppy Disk store?
1.44 Megabytes on a single 3.5" (90 mm) disk.
What is partitioning a hard drive?
Breaking a hard drive space into parts. Need to format drive after. This can be done in the disk management tool on windows. Run line: diskmgmt.msc
Put these in order from smallest to largest capacity A. CD-ROM, Dual-Layer DVD-ROM, 8 GB USB memory stick, Single-Layer Blu-ray disc B. 8 GB USB memory stick, Dual-Layer DVD-ROM, CD-ROM, Single-Layer Blu-ray disc C. CD-ROM, 8 GB USB memory stick, Dual-Layer DVD-ROM, Single-Layer Blu-ray disc D. Dual-Layer DVD-ROM, CD-ROM, Single-Layer Blu-ray disc, 8 GB USB memory stick
C! A CD-ROM capacity is generally about 700 megabytes, a Dual-Layer DVD-ROM can hold 8.5 GB, and a Single-Layer Blu-ray disc supports 25 GB of storage space.
Which of those would you most likely find in an MBR? The OS font table A list of usernames and passwords Disk Signature Location of the Windows Registry.
C. Identifies a disk.
How is data stored on a hard drive?
Data is stored in rings on platter (like tree rings). These are called "tracks".
What is a latency number?
Data transfer time. Lower the number the better.
What does DVD stand for?
Digital Versatile Disk
What are three benefits of a SSD?
Do not overheat Less moving parts to break Faster access time
Which of these storage devices can hold a maximum of 8.5 GB Single-Layer Blu-Ray Single-layer DVD-ROM CD-Rom Dual-Layer DVD-ROM
Dual Layer DVD-ROM 8.5 GB
What would you commonly find in the first sector of a storage device? Boot Loader Registry MBR BIOS
MBR (Master Boot Record)
What is on the inside of a disk drive?
Platters, multiple (disk goes on and spins) Spindle (turns disk in center) Actuator (Moves arm back and forth) Arm (needle on a record player) Head (the tip of the needle)
True or False: DVDs and Blu-Rays can have two layers
True
