← IGCSE Computer Science Paper 1

Tebibyte (TiB)

Tebibyte: a unit of data storage equal to 1024 GiB. The tebi prefix means 1024 to the power 4. A typical hard drive might hold 1 or 2 TiB.

Part of: IGCSE Computer Science 0478 — 1.3 Data Storage and Compression — Module 6

Understanding Tebibyte (TiB) in IGCSE Computer Science Paper 1

What it does: Tebi stands for 1024 to the power 4, so one TiB is 1024^4 bytes. Going from a larger unit (TiB) to a smaller unit (GiB) means multiplying by 1024. 1 TiB = 1024 GiB. Storage units in the IGCSE course go up in steps of 1024. TiB stands for tebibyte. It is a unit of storage measured in bytes, not bits. The order is MiB, then GiB, then TiB. A tebibyte is the next step up from a gibibyte. A typical hard drive holds around 1 or 2 TiB. 1 KiB is only 1024 bytes, which is tiny. 1 TiB is 1024 GiB, which is more than 1000 GiB.

Common mistakes: The value was divided by 1024 to convert GiB into TiB, so the label must be TiB, not GiB. 1 TiB is 1024 GiB, not 1000 GiB. Storage units use 1024, so the line should be gib ← tib * 1024.

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Learning
Duo
How many gibibytes (GiB) are in 1 tebibyte (TiB)?
1000 GiB1024 GiB
Matches
1 TiB = 1000 GiB
↓
Storage units go up in steps of 1024, not 1000, so 1 TiB is 1024 GiB
Applying
Meanings
Term
TiB
Meaning
Tebibyte: a unit of data storage equal to 1024 GiB. The tebi prefix means 1024 to the power 4. A typical hard drive might hold 1 or 2 TiB.
Practice
CONSTANT GIB_PER_TIB ← 1024
Testing
Gaps
1 TiB = GiB
Check Answer
Spots
2tib ← drive_gib / 1024
3OUTPUT tib, " GiB"

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Quick Questions

1. How many gibibytes (GiB) are in 1 tebibyte (TiB)?
A. 1024 GiB ✓
B. 1000 GiB
1 TiB = 1024 GiB. Storage units in the IGCSE course go up in steps of 1024.
2. Which statement about the unit TiB is correct?
A. TiB is the abbreviation for tebibyte ✓
B. TiB is the abbreviation for terabit
TiB stands for tebibyte. It is a unit of storage measured in bytes, not bits.
3. Which unit comes directly after the gibibyte (GiB) on the unit ladder?
A. Mebibyte (MiB)
B. Tebibyte (TiB) ✓
The order is MiB, then GiB, then TiB. A tebibyte is the next step up from a gibibyte.
4. The tebi prefix means 1024 to the power of what?
A. 4 ✓
B. 3
Tebi means 1024 to the power 4. Gibi is 1024 to the power 3.
5. Which size is a typical hard drive in a modern computer more likely to have?
A. 1 KiB
B. 1 TiB ✓
A typical hard drive holds around 1 or 2 TiB. 1 KiB is only 1024 bytes, which is tiny.

Match the Pairs

1 TiB = 1024 GiB → One tebibyte is made up of 1024 gibibytes, the next unit up from the GiB
2 TiB hard drive → A typical hard drive size, enough to store a very large amount of data
The tebi prefix means 1024 to the power 4, so a tebibyte is 1024^4 bytes → 1 TiB = 1024^4 bytes
To change 3 TiB into gibibytes, multiply by 1024 because each TiB holds 1024 GiB → 3 * 1024 = 3072 GiB
1 TiB = 1000 GiB → Storage units go up in steps of 1024, not 1000, so 1 TiB is 1024 GiB
1 TiB = 1024 MiB → 1024 MiB is only 1 GiB. A TiB is 1024 GiB, the unit below it is the gibibyte, not the mebibyte

Key Term

TiB
Tebibyte: a unit of data storage equal to 1024 GiB. The tebi prefix means 1024 to the power 4. A typical hard drive might hold 1 or 2 TiB.

Fill in the Blanks

1. 1 TiB = 1024 GiB
Hint: Type the number of gibibytes in one tebibyte.
2. 1 TiB = 1024 GiB
Hint: Type the abbreviation for the tebibyte unit.
3. 1 TiB = 1024 GiB
Hint: Type the unit that sits one step below the tebibyte on the unit ladder.
4. gib = 2 * 1024
Hint: Type the operator that converts a larger unit into a smaller unit.
5. 1 TiB = 1024^4 bytes
Hint: Type the power that the tebi prefix raises 1024 to.

Spot the Error

Question 1
A drive_gib ← 3072
B tib ← drive_gib / 1024
C OUTPUT tib, " GiB"
Line C — The value was divided by 1024 to convert GiB into TiB, so the label must be TiB, not GiB.
Question 2
A tib ← 2
B gib ← tib * 1000
C OUTPUT gib
Line B — 1 TiB is 1024 GiB, not 1000 GiB. Storage units use 1024, so the line should be gib ← tib * 1024.
Question 3
A GIB_PER_TIB ← 1000
B tib ← 5
C gib ← tib * GIB_PER_TIB
Line A — There are 1024 GiB in 1 TiB. The constant should be 1024, otherwise every conversion that uses it is wrong.
Question 4
A gib = 4096
B tib = gib * 1024
C print(tib, "TiB")
Line B — Going from a smaller unit (GiB) to a larger unit (TiB) means dividing by 1024, not multiplying. It should be tib = gib / 1024.
Question 5
A drive = 2
B file = 1500
C if file >= drive * 1024:
D print("Fits")
Line C — A file fits when its size is less than or equal to the drive size in GiB (2 TiB = 2048 GiB). The comparison should be <=, not >=.

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