Hitachi VSP 5000 Series - Conventions for Storage Capacity Values

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 eectively.
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
Conventions for storage capacity values
Preface
Hitachi Alert Notication Guide for VSP5000 Series 7