Physical storage capacity values (for example, disk drive capacity) are calculated based on the following values:
|
Physical capacity unit |
Value |
|---|---|
|
1 kilobyte (KB) |
1,000 (103) bytes |
|
1 megabyte (MB) |
1,000 KB or 1,0002 bytes |
|
1 gigabyte (GB) |
1,000 MB or 1,0003 bytes |
|
1 terabyte (TB) |
1,000 GB or 1,0004 bytes |
|
1 petabyte (PB) |
1,000 TB or 1,0005 bytes |
|
1 exabyte (EB) |
1,000 PB or 1,0006 bytes |
Logical capacity values (for example, logical device capacity, cache memory capacity) are calculated based on the following values:
|
Logical capacity unit |
Value |
|---|---|
|
1 block |
512 bytes |
|
1 cylinder |
Mainframe: 870 KB Open-systems:
|
|
1 KB |
1,024 (210) bytes |
|
1 MB |
1,024 KB or 1,0242 bytes |
|
1 GB |
1,024 MB or 1,0243 bytes |
|
1 TB |
1,024 GB or 1,0244 bytes |
|
1 PB |
1,024 TB or 1,0245 bytes |
|
1 EB |
1,024 PB or 1,0246 bytes |