Hitachi VSP N400 - Conventions for Storage Capacity Values

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WARNING Warns the user of a hazardous situation which, if not avoided,
could result in death or serious injury.
Conventions for storage capacity values
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 (10
3
) bytes
1 megabyte (MB) 1,000 KB or 1,000
2
bytes
1 gigabyte (GB) 1,000 MB or 1,000
3
bytes
1 terabyte (TB) 1,000 GB or 1,000
4
bytes
1 petabyte (PB) 1,000 TB or 1,000
5
bytes
1 exabyte (EB) 1,000 PB or 1,000
6
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:
■
OPEN-V: 960 KB
■
Others: 720 KB
1 KB 1,024 (2
10
) bytes
1 MB 1,024 KB or 1,024
2
bytes
1 GB 1,024 MB or 1,024
3
bytes
1 TB 1,024 GB or 1,024
4
bytes
1 PB 1,024 TB or 1,024
5
bytes
Conventions for storage capacity values
Preface
VSP N400, N600 Hardware Reference Guide 10