Date: Thu, 24 May 2007 14:15:00 -0400 From: John Nielsen <lists@jnielsen.net> To: tradigan@newrevolutions.net Cc: freebsd-questions@freebsd.org Subject: Re: gvinum and RAID Message-ID: <200705241415.00339.lists@jnielsen.net> In-Reply-To: <29548.208.40.168.12.1180030121.squirrel@www.newrevolutions.net> References: <4042.208.40.168.12.1180025016.squirrel@www.newrevolutions.net> <200705241358.50929.lists@jnielsen.net> <29548.208.40.168.12.1180030121.squirrel@www.newrevolutions.net>
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On Thursday 24 May 2007 02:08:41 pm tradigan@newrevolutions.net wrote: > > On Thursday 24 May 2007 12:43:36 pm tradigan@newrevolutions.net wrote: > >> Is it possible to use gvinum to create a striped array that contains the > >> root partition? I want to be able to combine all 4 of the hard disks > >> into > >> one logical striped array and install the boot partition on it. I have > >> found documentation on how to mirror the root drive, but none on using a > >> striped array for the root drive. > >> > >> Is this possible? > > > > Not without hardware support, no. > > > > I would create a small (1-2 GB) root partition one two or more of the > > drives > > and mirror it with gmirror (or not.. you must not care about fault > > tolerance > > if you're setting up a giant stripe). You could maybe use the same 1-2GB > > on > > the other drives for swap or tmp space (optionally mirrored as well). > > Then use the rest of the space on all the drives for your stripe array. > > I'd recommend gstripe over gvinum for ease-of-use, but it's up to you. > > > Is it possible to use gmirror for a small partition on two disks and then > use gstripe on the remaining disk space of those drives to create a larger > stripe? > > I didn't think that was possible. I could be wrong however :). > > If that will work, that would be my best option right there. Yes, that's exactly what I'm recommending. On each drive: fdisk -BI bsdlabel -wB bsdlabel -e (set up partitions here, use a for root and d for stripe) Then: gmirror label somename firstdisks1a seconddisks1a ... gstripe lable someothername firstdisks1d seconddisks1d ... etc. There are obviously a few blanks in the above but the manpages for each command and online documentation will help you fill them in. JN
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