Date: Wed, 7 Oct 2015 18:26:41 -0600 (MDT) From: Warren Block <wblock@wonkity.com> To: "William A. Mahaffey III" <wam@hiwaay.net> Cc: FreeBSD Questions !!!! <freebsd-questions@freebsd.org> Subject: Re: The saga continues Message-ID: <alpine.BSF.2.20.1510071814490.74151@wonkity.com> In-Reply-To: <56159C14.2070207@hiwaay.net> References: <5613CA68.6090909@hiwaay.net> <20151006212741.0e128a23.freebsd@edvax.de> <5614278F.10400@hiwaay.net> <alpine.BSF.2.20.1510062239530.9728@wonkity.com> <56159C14.2070207@hiwaay.net>
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On Wed, 7 Oct 2015, William A. Mahaffey III wrote: >> Please read the warning at the top of that page. The Handbook shows the >> right way of using gmirror(8). My page on it mirrors GPT partitions, which >> is likely to be a problem if one of the drives ever fails. If you >> absolutely have to use gmirror(8) with GPT, use only one partition per >> drive. >> > > > Can I partition the drives using '-s MBR', then mirror some of the partitions > & create '-s BSD' slices inside of those mirrors ? Ow, my brain. Why are you simultaneously creating safe data storage along with ultra-unsafe data storage? What is the end goal? Multiple mirrors between drive partitions is potentially dangerous. Consider that drives often die only a few days or hours apart. Now think of a two-drive system with multiple mirrored partitions. One drive has died. Put in a new drive, create the multiple partitions on it, and add them to the mirrors. All of them start replicating at the same time, putting a big load on the original still-working drive. The drive that is the same age as the drive that failed... > Specifically, I would partition each drive into 4 primary partitions, > /boot, swap, 1 partition to be mirrored & then sliced up as per the > handbook, & 1 partition to be striped & then sliced up ? I would > probably mirror /boot as well, if feasible. It seems this might > comport w/ all of the restrictions & possible meta-data conflicts, but > I am definitely out of my area, hence the questions. TIA & have a good > one. /boot is a directory in /, the boot partition is just a place to store bootcode. They are separate things. What is the function of the RAID0 here? Can it be replaced with tmpfs or maybe an SSD?
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