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Date:      Fri, 06 Dec 2013 02:36:44 -0500
From:      "Mike." <the.lists@mgm51.com>
To:        freebsd-questions@freebsd.org
Subject:   Re: gmirror, gpart and MBR vs GPT in the Handbook
Message-ID:  <201312060236440793.085C6E77@smtp.24cl.home>
In-Reply-To: <alpine.BSF.2.00.1312021411420.15921@wonkity.com>
References:  <201311301303210813.05DE187E@smtp.24cl.home> <alpine.BSF.2.00.1311301352140.99113@wonkity.com> <201312011121580096.005D00FB@smtp.24cl.home> <alpine.BSF.2.00.1312011016490.5791@wonkity.com> <201312021213320528.00673D5F@smtp.24cl.home> <alpine.BSF.2.00.1312021411420.15921@wonkity.com>

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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.
 =============


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.

Mike.





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