Date: Mon, 2 Dec 2013 14:21:49 -0700 (MST) From: Warren Block <wblock@wonkity.com> To: "Mike." <the.lists@mgm51.com> Cc: freebsd-questions@freebsd.org Subject: Re: gmirror, gpart and MBR vs GPT in the Handbook Message-ID: <alpine.BSF.2.00.1312021411420.15921@wonkity.com> In-Reply-To: <201312021213320528.00673D5F@smtp.24cl.home> 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>
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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.
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