Date: Thu, 22 Jul 2010 13:45:36 +0400 From: Boris Samorodov <bsam@ipt.ru> To: Charles Sprickman <spork@bway.net> Cc: freebsd-stable@freebsd.org Subject: Re: Using GTP and glabel for ZFS arrays Message-ID: <52875423@serv3.int.kfs.ru> In-Reply-To: <alpine.OSX.2.00.1007220448070.33454@hotlap.local> (Charles Sprickman's message of "Thu\, 22 Jul 2010 04\:51\:11 -0400 \(EDT\)") References: <4C47B57F.5020309@langille.org> <4C47B7DD.3070604@langille.org> <52881603@ipt.ru> <alpine.OSX.2.00.1007220448070.33454@hotlap.local>
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Charles Sprickman <spork@bway.net> writes: > On Thu, 22 Jul 2010, Boris Samorodov wrote: >> On Wed, 21 Jul 2010 23:15:41 -0400 Dan Langille wrote: >>> On 7/21/2010 11:05 PM, Dan Langille wrote (something close to this): >> >>>> First, create a new GUID Partition Table partition scheme on the HDD: >>>> gpart create -s GPT ad0 >>>> >>>> Let's see how much space we have. This output will be used to determine >>>> SOMEVALUE in the next command. >>>> >>>> gpart show >>>> >>>> Create a new partition within that scheme: >>>> gpart add -b 34 -s SOMEVALUE -t freebsd-zfs ad0 >>>> >>>> Now, label the thing: >>>> glabel label -v disk00 /dev/ad0 >> >> That command will destroy secondary GPT. > > I was just reading about GUID partitioning last night and saw that one > of the benefits is that there's a copy of the partition table kept at > the end of the disk. That seems like a pretty neat feature. > > Do you by any chance have a reference I can point to (I was > documenting stuff about GPT in an internal wiki and this is a nice > piece of info to have)? > > Also, how does one access/use the "backup" partition table? http://en.wikipedia.org/wiki/GUID_Partition_Table -- WBR, bsam
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