Date: Tue, 4 Mar 2014 11:29:04 +0100 (CET) From: =?ISO-8859-1?Q?Trond_Endrest=F8l?= <Trond.Endrestol@fagskolen.gjovik.no> To: Andrew Berg <aberg010@my.hennepintech.edu> Cc: FreeBSD questions <freebsd-questions@freebsd.org> Subject: Re: ZFS, GPTIDs, and using the whole disk Message-ID: <alpine.BSF.2.00.1403041125240.720@mail.fig.ol.no> In-Reply-To: <53155486.2060300@my.hennepintech.edu> References: <CAPi0psuD5zDBuBZmE3tBKDeFdMcpvBn3pU4waDu6FU8SaTs0-Q@mail.gmail.com> <53155486.2060300@my.hennepintech.edu>
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On Mon, 3 Mar 2014 22:20-0600, Andrew Berg wrote: > On 2014.03.03 17:47, Chris Stankevitz wrote: > > Please identify any false statements: > > > > 1. ZFS prefers to use the entire disk. > Prefers, maybe, but it is not a big deal on FreeBSD as has already been explained. > > > 4. Because of (3) it is dangerous to use device names when building a zpool > You would just need to be careful *at pool creation time* that you are using the correct block devices. You can swap them around all you > like afterward since ZFS doesn't use device names to find block devices belonging to a pool. > > > 7. You can create a zpool of GPTIDs > You can refer to block devices by GPT labels when creating a pool. I'm not sure if that's what you meant. > > I personally use GPT labels with each disk in my main pool having one partition for its entire space. Without GPT labels, the only reliable > to distinguish between each disk is its serial number (they are all 3TB WD Reds), which would not be fun to use if one of them suddenly dies. +1 If you want zpool status to show your carefully crafted GPT labels, export the pool and import the pool specifying -d /dev/gpt before putting the pool into production. -- +-------------------------------+------------------------------------+ | Vennlig hilsen, | Best regards, | | Trond Endrestøl, | Trond Endrestøl, | | IT-ansvarlig, | System administrator, | | Fagskolen Innlandet, | Gjøvik Technical College, Norway, | | tlf. mob. 952 62 567, | Cellular...: +47 952 62 567, | | sentralbord 61 14 54 00. | Switchboard: +47 61 14 54 00. | +-------------------------------+------------------------------------+
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