Hitachi Unified Storage VM, Руководство по обзору продукта

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Hitachi Unified Storage VM Product Overview Guide
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Preface
Convention for storage capacity values
Physical and logical storage capacities of disk drives in Hitachi Data Systems
storage products are calculated based on the following values:
Logical storage capacity values (logical device capacity) are calculated
based on the following values:
Accessing product documentation
The Unified Storage VM user documentation is available on the Hitachi Data
Systems Support Portal: https://Portal.HDS.com . Check this site for the
most current documentation, including important updates that may have
been made after the release of the product.
Getting help
The Hitachi Data Systems customer support staff is available 24 hours a
day, seven days a week. If you need technical support, log on to the Hitachi
Data Systems support portal for contact information: https://
Portal.HDS.com
Important Information that is essential to the completion of a task.
Caution Failure to take a specified action can result in adverse
conditions or consequences such as damage to the software
or hardware
WARNING Failure to take a specified action can result in severe
conditions or consequences such as in loss of data or serious
damage to hardware.
ELECTRIC
SHOCK
HAZARD Failure to take appropriate precautions such as not opening
or touching hazardous areas of the equipment could result
in injury or death.
Icon Meaning Description
Physical Disk Capacity
1 KB = 1,000 bytes
1 TB = 1,000
4
bytes
1 MB = 1,000
2
bytes 1 PB = 1,000
5
bytes
1 GB = 1,0003 bytes
1 EB = 1,000
6
bytes
Logical Disk Capacity (1 block= 512 bytes)
1 KB (kilobyte) = 1,024 bytes (2
10
) 1 TB (terabyte) = 1,024
4
bytes
1 MB (megabyte) = 1,024
2
bytes 1 PB (petabyte) = 1,024
5
bytes
1 GB (gigabyte) = 1,024
3
bytes 1 EB (exabyte) = 1,024
6
bytes