1.5 Flashcards
How much can a CD-ROM hold?
Up to 700 MB
How much can a DVD-ROM hold?
Up to 4.7 GB
How much can a Dual Layer DVD-ROM hold?
Up to 8.5 GB
How much can a Blu-Ray hold?
Up to 25 GB
How much can a Dual Layer Blu-Ray hold?
Up to 50 GB
Which optical format can hold up to 700 MB?
CD-ROM
Which optical format can hold up to 4.7 GB?
DVD-ROM
Which optical format can hold up to 8.5 GB?
Dual Layer DVD-ROM
Which optical format can hold up to 25 GB?
Blu-Ray
Which optical format can hold up to 50 GB?
Dual Layer Blu-Ray
How does commercial devices write to optical media?
They create tiny bumps on the disk
How does retail devices write optical media?
They burn the photosensitive dye
Which types of optical media can be rewriteable?
RW and for Blu-Ray (BD-RE)
Which types of optical media can only be recorded once?
R (ie DVD-R, BD-R)
How does a Hard Disk Drive (HHD) operate?
By spinning platters inside of the HHD
What does RW mean on optical media?
Rewritable
What does R mean on optical media?
Recordable
What does the platters on a HDD spin around?
Spindle
What is a spindle?
It is what the platters inside of a HDD spin around
What moves the arm back and forth on a HDD?
Actuator
What does an actuator do?
Moves the arm back and forth on an HDD
What read and writes information onto the platter of a HDD?
Head
What does the head on a HDD do?
It reads and writes information onto the platter of a HDD
What is a Solid State Drive (SSD)?
A storage device containing non-volatile flash memory, used in place of a hard disk because of its much greater speed.
Which is faster SSD or HDD?
Solid State Drive (SSD)
What does an SSD use as memory?
Flash Memory
What is a Solid State Hybrid Drive (SSHD)?
It combines a spinning drive and a SSD into a single device
What combines a spinning drive and a SSD?
Solid State Hybrid Drive (SSHD)
What does a SSHD do different?
It caches the slower spinning hard drive data onto the flash memory
What is a hot swappable drive?
You can add and remove drives while the system is running
What type of devices can be hot swappable? (4)
USB, Firewire, SATA, eSATA
Is a USB device hot swappable?
Yes
Is a Firewire device hot swappable?
Yes
Is a SATA device hot swappable?
Yes
Is a eSata device hot swappable?
Yes
What does USB flash drives use as memory?
EEPROM flash memory
What is a plus for USB flash drives?
Non-volatile memory and it needs no power to retain data
What is a negative for USB flash drives?
It has a limited number of writes
What is the common flash memory type in mobile devices?
eMMC
What is tape drive commonly used for?
Archival purposes
How does tape drives store data?
With a magnetic tape with sequential storage
What type of format does tape drives use?
Linear Tape-Open (LTO)
Which type of storage device uses the Linear Tape-Open format?
Tape Drives
Which types of flash drive uses EEPROM flash memory?
USB flash drives
What type of flash drive has nonvolatile memory and it needs no power to retain data?
USB flash drive
Which provides a higher performance? Software or hardware based RAID?
Hardware
Which RAID does just striping?
RAID 0
What does striping do in RAID systems?
It splits the file blocks between two or more drives
What is a negative for RAID 0?
It has no redundancy. If one drive fails everything is lost
What is a positive for RAID 0?
High performance so the data can be written quickly
What does RAID 0 do?
Striping only
What does RAID 1 do?
Mirroring only
Which RAID does just mirroring?
RAID 1
What is RAID mirroring?
File blocks are duplicated between multiple physical drives
What is a positive for RAID 1?
High redundancy. If one drive fails you have a backup
What is a negative for RAID 1?
Requires double the disk space you would normally need
What does RAID 5 do?
Striping with parity
Which type of RAID does striping with parity?
RAID 5
How many disks does RAID 5 need?
Atleast 3
What does RAID 1+0 do?
A Stripe of mirrors
How many drives does RAID 1+0 need?
4
Which RAID does a stripe of mirrors?
RAID 1+0
What is a HDD speed measured in?
Revolutions per minute (RPM)
What is measured at Revolutions per minute?
HDD
What exotic connectors can come with a SSD? (2)
mSata and M.2
What is a M.2 connector?
A special slot on a motherboard for a SSD
What is a special slot on a motherboard for an SSD?
M.2 connector
What is the Windows trim function?
a periodic garbage collection system that identifies SSD memory cells with deleted content and erases them
Which Windows function is a periodic garbage collection system that identifies SSD memory cells with deleted content and erases them
Windows trim function
What is the host bus adapter (HBA)?
SATA controller
What is the max distance of a PATA cable?
18 inches
What is the max number of SATA drives you can have in a computer?
Unlimited
What is hot swapping?
Where you can plug in and uplug a device while a computer is running
What is the max throughput of SATA 3.2 / SATAe?
16 Gb/s
If you have two drives on separate controllers and they mirror each other what is that called?
disk duplexing
What is disk duplexing?
You have two drives each on a separate controller and they mirror each other
Which raid options come with Windows Server?
RAID 0 / 1 / 5
What is a Hard disk drive (HDD)?
A hard disk is a thick magnetic disk encased in a thicker protective shell.
Standard hard drives are categorized as:
5400 rpm (inexpensive HDD)
7200 rpm (good quality HDD)
10,000 rpm (expensive HDD)
How much can a CD-RW hold?
650 Megabytes
