Storage Devices

Question 1

LBA - Logical Block Addressing

Answer 1

We can pretty much plug in any storage device right and the OS will be able to have it work right away

Question 2

Storage Device Sizes

Answer 2

5. 25 inch - Optical Media
6. 5 Inch - Usually Magnetic Hard Disks
7. 5 Inch - SSD and smaller devices storage
   m. 2 - SSD

Question 3

IEC Values vs Decimal Numbers

Answer 3

Kilo = 1000, Kibi = 2^10 (1024)
Mega = 1,000,000, Mebi = 2^20

this is why storage device capacity you see on a computer is slightly different than manufacturer advertised amount

Question 4

RAID0 (Striping)

Redundant Array of Inexpensive Disks

Answer 4

Saving files in chunks. Chunk 1 goes to HD1, 2 goes to HD2, 3 goes to HD1, 4 goes to HD2 etc…

Purpose - Speed, if one drives die you lose everything

Question 5

RAID1 (Mirroring)

Answer 5

We use 2 drives.
We store a file onto the 2 drives. File gets cut into chunks.
Chunk 1 goes to both H1 and HD2
chunk 2 goes to both
etc...
Purpose - Redundancy (safety)

Question 6

RAID5 (striping with parity)

Answer 6

Requires Min 3 drives.
Split a file in chunks
Store 1 piece on HD1
Store piece 2 on HD2
Create a Parity value of the 2 file pieces thats the exact same size as the 2 pieces and put it on HD3
that way if one drive dies, everything isnt lost

redundancy and speed

Question 7

RAID10 (combing different RAIDs)

RAID0 +1

Answer 7

Min of 4 drives (2 pairs)

File piece 1 goes to HD1 and HD2
file Piece 2 goes to to HD3 and HD4

RAID0+1
same 2 pairs
File piece 1 goes to HD1 and HD3
File piece 2 goes to HD2 and HD4