Date: Thu, 19 Jul 2001 15:40:03 +0200 From: Jos Vissers <jos@hoogehof.nl> To: Jamie Heckford <jamie@uk.clara.net> Cc: freebsd-questions@freebsd.org, freebsd-stable@freebsd.org Subject: Re: Vinum Mirroring question Message-ID: <20010719154003.A14666@hoogehof.nl> In-Reply-To: <20010719125205.A7545@trinity.noc.clara.net>; from jamie@uk.clara.net on Thu, Jul 19, 2001 at 12:52:05PM %2B0100 References: <20010719125205.A7545@trinity.noc.clara.net>
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On Thu, Jul 19, 2001 at 12:52:05PM +0100, Jamie Heckford wrote:
> Hi,
>
> Not sure if this is supposed to be like this or if I have
> set it up wrong.
>
> I have a vinum mirror with the total size supposed to be
> 1024M.
>
> But, here is what df -h reports:
>
> /dev/vinum/mirror 1.9G 1.0K 1.8G 0% /usr/local/var/nntpcache-map
>
> which makes it appear as if the disks are striping.
>
> However, vinum reports the following under list:
>
> S mirror.p0.s0 State: up PO: 0 B Size: 1023 MB
> S mirror.p0.s1 State: up PO: 1023 MB Size: 1023 MB
>
> Im confused. Is this a bug or have I set something up wrong? I thought mirroring
> a drive would allow you to have a partition on one disk drive, and when its written
> it writes to both drives at the same time.
>
> Below is my Vinum configuration (Ignore the vinum0 volume, that is setup and
> works fine :) )
>
> # Vinum configuration, saved at Thu Jul 19 10:34:27 2001 - Jamie
> drive vinumdrive0 device /dev/da1e
> drive vinumdrive1 device /dev/da2e
> drive vinumdrive2 device /dev/da3e
> volume vinum0
> plex name vinum0.p0 org striped 512s vol vinum0
> sd name vinum0.p0.s0 drive vinumdrive0 plex vinum0.p0 len 69584384s driveoffset 265s plexoffset 0s
> sd name vinum0.p0.s1 drive vinumdrive1 plex vinum0.p0 len 69584384s driveoffset 265s plexoffset 512s
> sd name vinum0.p0.s2 drive vinumdrive2 plex vinum0.p0 len 69584384s driveoffset 265s plexoffset 1024s
> # Mirror
> drive vinumdrive3 device /dev/da3a
> drive vinumdrive4 device /dev/da2a
> volume mirror setupstate
> plex name mirror.p0 org concat
> sd name mirror.p0.s0 drive vinumdrive3 size 0b
You forgot the mirror plex:
plex name mirror.p1 org concat
> sd name mirror.p0.s1 drive vinumdrive4 size 0b
I would sugest:
sd name mirror.p1.s0 drive vinumdrive4 size 0b
> Please let me know if I have miss-configured something.
A volume consists of at least 1 plex.
You can create mirrors by creating additional plexes for a volume.
Each plex consists of 1 or more subdisks that can be concatenated,
striped or raid5.
> Cross posted to stable incase it is a bug, more than likely i've got something
> wrong somewhere though so apologies in advance ;)
>
> Thanks,
>
> --
> ========================================================
> Jamie Heckford | jamie@uk.clara.net
> Systems Administrator | 020 7903 3015
> Clara.Net | www.clara.net
> ========================================================
>
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--
Jos Vissers
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