Date: Sun, 07 Mar 1999 14:42:50 -0800 From: Ludwig Pummer <ludwigp@bigfoot.com> To: tim@scratch.demon.co.uk Cc: freebsd-chat@FreeBSD.ORG Subject: Re: vinum again Message-ID: <4.1.19990307143449.00a76be0@mail-r> In-Reply-To: <199903072143.VAA00531@franklin.matlink>
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At 01:41 PM 3/7/99 , tim@scratch.demon.co.uk wrote: >its the newfs bit that was giving me a headache, mounted ok but on >reboot put me single user as could not mount vinum drive It should have mounted your vinum volume automatically if you put your vinum drive/slice in your rc.conf. Does your rc.conf have a vinum_drives option somewhere? What was the error message? >I had to vinum create configfile and then mount it manually. What do you mean, exactly? Could you give details of your configfile? What did you do to mount it? >This could be a problem with the name or location of my config file is >there a certain name or place for these ? I'm not sure what you're referring to. The vinum config file is only needed once, when you do the 'create' command. After that, you just do 'vinum /dev/somedrive' where somedrive is a drive on which you have vinum (like /dev/wd1 or /dev/wd0s1h). >Question: > >The concat form I thought does not do mirroring as it fills each >subdisk in turn - is this correct ? Right. Concat combines multiple vinum subdisks into one big volume. >If not then how to get it mirroring would that be by having more than >one plex on the volume ? Exactly. I have volume usr, plex usr.p0 and usr.p1, subdisks usr.p0.s0 and usr.p1.s0. Ditto for volume var. >Do you use raid or raid-5, if so does it affect performance much ? I don't know which RAID I'm using. Drive mirroring is either 1 or 0. I don't have hard performance numbers. If you understand how the different RAID configuration works, you can kind of reason which will be a better performer and which will be more resilient to drives dying. >What I really want to do sounds simular to your setup usr and var being >mirrored and I want to have /home/data in a form whereby as and when it >is needed I can add more subdisks or plexes whichever would be >appropriate to extend the availiable space, rather than new disk, and >copy accross. So you'd have usr and var volumes (or maybe all under usr. if you don't have a compelling reason for a separate var, you probably shouldn't have one) with 2 plexes, and /home/data in one plex with multiple subdisks. --Ludwig Pummer ( ludwigp@bigfoot.com ) ICQ UIN: 692441 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message
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