RAID

What is the standard capacity of an SD card

4 GB

What is the difference between fault tolerance and backup?

Fault tolerance means that the hard drives can continue to function(with litle or no downtime) even if there is a problem with one of the drives. Backup means that you are copying the data to another location for archical in the event of a disaster.

RAID

RAID stands for Redundant Array of Independent Disks. designed to increase the speed of reading and writing data.

BD-R

To write to a disc once.

If you have a RAID adapter card and the motherboard has built in RAID in the motherboard, What should you do to avoid a conflict?

Turn off the RAID option in the BIOS of the motherboard.

What are the two types of Compactflash cards?

Type 1 cards that are ..3mm thick and type 2 5mm thick.

What kind of sd card or UHS you will need to record in 4k

UHS3, which has a minimum writing speed of 30MB/s.

Are the read and write cd speed the same?

Yes

What combo drives mean?

are drives that can read and write CD and DVD and RW too.

How are CD-ROM drives rated?

in read speeds (for example, 48x)

Data Cd technologies

laser shines on the reflective surface of the CD and stores data as a plethafora of microscopic indentatons known as lands and pits.

Capacity of SDXC

maximium capacity of 2 TB. Typical Capacities include 64,128,256 and 512GB.

Solid State Media

media with no moving parts. Most of these are implemented as large amounts of nonvolatile memory,knows as flash memory, and are located on a card or drive.

What is the x?

x equals 150KB/s..

Mini-disc, single-layer

1 7.8GB

DVD-9 Sides, total layers and capacity

1 Side , 2 layers and 8.5GB

DVD-5 Sides, total layers and capacity

1 Side, 1 layer and 4.7GB

Standard disc, single layer

1 layer, 25GB

DVD-18 Capacity

17GB

Mini-disc, dual layer

2 layers 15.6 GB

Standard disc, dual layer

2 layers 50 GB

DVD-10 Sides, total layers and capacity

2 sides, 2 layers and 9.4GB

DVD-18 Sides, total layers and capacity

2 sides, 4 layers and 17GB

DVD-14 Sides, total layers and capacity

2 sides, and 3 layers and 13.2GB

Standard disc, XL 3 layer

3 layers 100GB

Standard disc, XL 4 Layer

4 layers 128GB

DVD-5 Capacity

4.7GB

What is the transfer rate fro embedded MMC or eMMC?

400MB/s

What is the most common size of a CD-ROM drive?

5.25 inches wide (instead of 3.5 or 2.5 inches).

How big are the pages that the faulty blocks are saved?

512 bytes and 4 KB. Each page has error detection and correction information associated with it.

What other capacities are for CD?

650MB, 800MB, and 900MB

What is the capacity of typical CD?

700MB of data

Mini-disc size

8cm

What to do when a USB acts intermittently?

A quick reformat, unless the device has failed completely. Sometimes you will have usb flash and solid stage drives conflict with each other and you will have to change the letter of each driver.

To access triple and quadruple-layer you need to have installed a _______

BD-XL drives

What method NAND flash memory use to avoid saving data to faulty blocks?

Bad Block Management. This method maintains a table of the faulty blocks within the USB flash device.

USB Flash Drives

Before removing usb flash drive, make sure to eject the USB from the task bar notification. Right click and select eject. if this option is not available, shut down the computer to avoiddata corruption or loss.

Fault tolerance

Capability of the hard drive system to continue working after there is a problem with on of the drives.

RAID 10

Combines the advantages of RAID 1 and RAID 0. Requires a minimum of two disks but will usually have four or more. The system contains at least two mirrored disks that are then striped. Fault tolerance. 2 (usually 4)

Recording Speed of CD-RW

Compact Disc-ReWritable 24x (3.6 MB/s or 32x (4.8MB/s)

Recording Speed of CD-R

Compact Disk-Recordable 48x (7.2 MB/s) or 52 (7.8 MB/s)

RAID 0

Data is striped acrross multiple disks in an effort to increase performance. No Fault tolerance. need 2 minimium disks.

What is called when each disk is connected to a separate controller?

Disk Duplexing

What is the format USB flash drives are shipped?

FAT32

xD- Picture Card

Flash memory technology used in older digital cameras.

Requirement of Class 10

Full HD video recording (1080P) has a minimium data writing speed of 10 MB/s.

How can you dislodges jamed optical trays?

Many drives have a pinhole near the volume knob. Insert a paper clip into the hole to attempt to free the tray and CD.

RAID 1

Mirroring. Data is copied to two identical disks. If one disks fails, the other continues to operate. When each disk is connected to a separate controller, this is known as Disk Duplexing. Faul tolerance. 2 (and 2 only)

Type of memory in a USB flash drive

NAND flash memory is the core of a USB flash drive.

Difference between NAND and NOR flash memory

NAND small amounts of failures incure, NOR is free of failures.

What are the three sizes of SD cards?

SD (32mm x 24mm), mini sd (21.5mm x 20mm) and micro sd (15mm x 11mm)

SD cards and SDXC and divided into classes depending on their transfer rates.

SD class 2, 4,6 and 10 as well UHS 1 and 3, each with a different range of speeds.

What is the new version of SD card

SDHC The newer eXtended capacity

SD card

Secure Digital Cards for the most part, are technically the same type of device as a USB flash drive.

RAID 5

Striping with Parity. Data is stripped across multiple disks; fault tolerant parity data is also written to each disk. If one disk fails, the array can reconstruct the data from the parity information. Fault tolerance and 3 minimum number of disks.

What happen if your computer can't read and SDHC or SDXC?

The firmware is outdated. Do in update to the firmware.

How is SATA CD-ROM connect?

The same way as their hard drive. a 7-pin data cable and 15-pin power cable. This send stereo music directly through the data cable.

Why CD technology was created?

This new technology replaced the old technologies, such as floppy disks or Zip drives.

How RAID disks supposed to be built?

Using identical disks. same magnetic drives or same Solid-states drives.

In which operating system RAID 1 is not available?

Windows Vista but is available in Windows 7 Professional and Ultimate and WIndows 8/8.1

Why DVD have more capacity than CD?

because the pits on the surface are smaller than the pits on the CD. .74 micrometeres compared to 1.6 micrometers.

first step when RAID disk stop working

check if the disk are securely connected to the controller adapter card. then check that the driver for the RAID device is installed and updated.

BD-RE

erased and re-recorded multiple times.

How are sd cards formatted by the manufacturer?

exFAT instead of FAT32.

NAND flash

memory is divided in blocks of 16 KB/S to 512KB/s. It last about 10 years, 1 million write or erase cycles.

How to calculate a CD-ROM drive's maximum read speed?

multiply the number preceding the x by 150KB. In this example, this would be 48 x 150KB = 7.2MB/s.

How are CD-ROM known?

removable media; however, the drive is normally fixed in the computer.

Advantages of USB flash drives

small device, newer usb drives can go up to 250GB and beyond. no setup. don't to burn like a disk. is just dragged and dropped to the drive.

Compact Disc

store music, sounds, or other data.

Blu- ray

the standard for High-definition video. The standard disc is 12 cm the same size as a standard DVD or CD.

CompactFlash Cards

used the same memory as usb and SD cards. NAND. These are larger than SD cards. used in handhelds computers and high-end cameras (Type1) and microdrivers Type 2.