gmirror, gpart and MBR vs GPT in the Handbook
Mike.
the.lists at mgm51.com
Tue Dec 3 02:07:08 UTC 2013
On 12/2/2013 at 2:21 PM Warren Block wrote:
|On Mon, 2 Dec 2013, Mike. wrote:
|
|> My understanding is that MBR can be used with drives only up
to
|> and including 2TB in size. So if I use MBR, the maximum
drive
|> size I could use would be 2TB. Is that correct?
|
|As far as I recall, MBR expects 512-byte blocks and uses 32-bit
values.
|The total number works out to 2TB (2^32*512).
|
|Just recently, someone in the forums had an external drive, MBR
format,
|but 4K blocks. There were problems, although I don't know if
FreeBSD
|was at fault.
|
|I have not tried MBR on a drive larger than 2TB. I suspect it
would be
|safe to use the first 2TB and ignore the rest, but that really
ought to
|be verified.
=============
At this point, the drives are 2TB, no more. So I should be OK.
Thanks.
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