
OWC Mercury Elite Pro Chapter 2 - System Setup
2.1 Hard Drive Assembly & Installation (continued)
2 SYSTEM SETUP
Since hard drives have been introduced with capacities greater than 2.2TB, the
industry has worked to resolve known capacity addressing limitations that date
back to the original design of the PC.
These limitations are caused by 32-bit denitions used for partition sizes and
logical block addresses (LBAs) resulting in a maximum addressable capacity size
of 2.199TB.
The most direct way to resolve this issue is to use Long LBAs. However, Long
LBAs are only supported in 64-bit operating systems, like Mac OS X, Windows 7
and Windows Vista. Users of older operating systems wishing to use these high-
capacity drives will need to limit the drive size to under 2.2TB to be able to use
the storage solution.
To limit the OWC Mercury Elite Pro’s maximum drive capacity to 2.2TB, ip the
dip switch (circled below) to the 1 position. The default position is ON meaning
volumes larger than 2.2TB are able to be created.
IMPORTANT - IF YOUR DRIVE IS LARGER THAN 2TB
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