Date: Fri, 10 Jul 2015 09:43:38 -0700 From: Don whY <Don.whY@gmx.com> To: Cary <cary@SDF.org> Cc: freebsd-hackers@freebsd.org Subject: Re: format/newfs larger external consumer drives Message-ID: <559FF63A.9020607@gmx.com> In-Reply-To: <86fv4wdfpw.fsf@bsdstb.Belkin> References: <86fv4wdfpw.fsf@bsdstb.Belkin>
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On 7/9/2015 5:22 PM, Cary wrote: > Don whY <Don.whY@gmx.com> writes: > >> When building a filesystem (FFS) on these 1/2/3/4TB external USB >> drives, any suggestions? E.g., changing block sizes? Cut into >> multiple slices to make fsck's job easier (as well as *recovery*)? >> >> Any other pointers? >> >> [Note that I'm not looking for "performance" -- otherwise I wouldn't >> be going the external route -- but, rather, "bulk, semi-offline >> storage"] > > Before worrying about fsck(8) I recommend you think about using > geom(8) to put a journal on the device if your > plan is to create a FFS filesystem. The journal consumes some > drive space but for any filesystem over 20-30 GB > it won't limit your storage capacity very much. > > I do not have any external drives formatted with FFS, and I would be > interested to know myself if it is at all possible to use gjournal(8) > with an external usb drive. Someone else on the list must know > the answer to that question. > > You should read the man page for gjournal(8) and note the part about > disabling soft-updates and using the async mount(8) option. > > There is a short intro to the topic in the handbook. > http://www.freebsd.org/doc/en/books/handbook/geom-gjournal.html Thanks, I'll check into it. I'm interested in developing some guidelines for designing "appliances" where the hardware complement isn't typically as rich as a desktop environment (e.g., would *not* include a disk interface but *could* exploit an external disk, etc.). Of course, anything external means the user could insert/remove it at will -- which complicates how the system will deal with the resource.
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