Convention Description
| vertical bar Indicates that you have a choice between two or more options or arguments.
Examples:
[ a | b ] indicates that you can choose a, b, or nothing.
{ a | b } indicates that you must choose either a or b.
This document uses the following icons to draw attention to information:
Icon
Label Description
Note Calls attention to important or additional information.
Tip Provides helpful information, guidelines, or suggestions for performing
tasks more effectively.
Caution Warns the user of adverse conditions and/or consequences (for
example, disruptive operations, data loss, or a system crash).
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:
Preface 11
Hitachi Virtual Storage Platform F800 Hardware Reference Guide
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