Data Storage - Re: What is the largest LUN that can be presented to a Windows host?

Author

Re: What is the largest LUN that can be presented to a Windows host?

moojit

2007-09-10, 1:11 am

"tc" <tchang73nyc@yahoo.com> wrote in message
news:1189280584.178402.122410@o80g2000hse.googlegroups.com...
> I've heard different answers to this. Is 2TB the limit? Thanks in
> advance.
>

There are several API's that return disk size in Windows, both return a
64bit unsigned integer representing the number of bytes. This tells me that
Microsoft supports up to (2**64 - 1) or 18446744073709551615 bytes.
According to the SDK, this support has been available since Win95. This
also corresponds closely to the value returned by a READ CAPACITY (16)
command, which can return a maximum LBA value of FFFFFFFF FFFFFFFE h.
Multiply this value by typical block size of 512B and you will get something
close the Microsoft supported value.

Moojit