gmirror, gpart and MBR vs GPT in the Handbook

Mike. the.lists at
Fri Dec 6 07:36:50 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
|> and including 2TB in size.  So if I use MBR, the maximum
|> size I could use would be 2TB.  Is that correct?
|As far as I recall, MBR expects 512-byte blocks and uses 32-bit
|The total number works out to 2TB (2^32*512).
|Just recently, someone in the forums had an external drive, MBR
|but 4K blocks.  There were problems, although I don't know if
|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.

Bringing some closure to this thread....

*** gmirror is working fine for me ***

As I type this, all my data has been transitioned, and I am
listening to tunes originating from the gmirror raid array.
Music is flowing.  Life is good here.  :)

Many thanks for the help and assistance provided by all those
who responded and jumped in to help.


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