Date: Tue, 8 Aug 2000 14:07:58 -0700 From: "Kevin J. Menard, Jr." <kmenard@cisco.com> To: <freebsd-questions@freebsd.org> Subject: vinum and /usr Message-ID: <008901c0017c$bb3689e0$5acf45ab@cisco.com>
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This is a multi-part message in MIME format. ------=_NextPart_000_0086_01C00142.0E5EFF70 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sorry for the repost. But I figured that the topic in the last past = really didn't represent the issue I'm having now, as this one is a new = one, as opposed to my last post which was a Re: of my original issue :-P Oops. I fluffed up a little. I'm too young to be losing my memory. Oh = well. I have / =3D 50M, /var =3D 20M, swap =3D 773M, and /usr takes up the = remaing 8900M or so. I didn't arbitrarily pick these values -- I let /stand/sysinstall do = that for me. I have a total of 6 IDE drives. All of which are 10GB in size. I want = to have two striped plexes of 3 subdisks each. The second plex mirroring the = first. Working well into the morning, I think I made some serious headway. I = can create 5 of the 6 drives from my physical HDDs. The one that fails (vinum told = me so) is the main HDD. I'm guessing I'm having trouble making /usr part of a plex = because it is in use at the time. I persevered regardless, and built the volume, and = then it segfaulted and FreeBSD restarted. I'm assuming this is because that = first drive was never really initialized as a drive. Hope I provided sufficient information to get a useful answer :-) Thanks again, -Kevin Greg Lehey wrote: > On Monday, 7 August 2000 at 12:07:22 -0400, Kevin Menard wrote: > > Hi, > > > > I have thoroghly RTFM, but still have a question about vinum. I = realize that / > > cannot be mirroredd. I would imagine I would not want to mirror = swap space and > > /var, simply because they change so frequently and that would put = unneeded > > stress on the CPU. > > If you lose swap, you can crash your system. > > > Plus it really just doesn't make all that much sense to mirror > > temporary data. > > That depends on how important it is while it's there. > > > My question is this though. If I have a 9770M drive, with a / =3D > > 20M, /var =3D 50M, swap =3D 777M, and /usr =3D the rest, how would I = go > > about mirroring the rest of the drive? > > With 20 MB /, I don't think you'd get that far. Take at least 40 MB. > And I'd be interested to know how you know that you need exactly 50 MB > /var. > > > I mean, there's about 9 gigs of /usr data that could be mirrored. > > How many disks do you have? For mirroring you need at least 2. > Mirroring on the same drive doesn't buy you much, just the possibility > to recover from uncorrectable sector data errors. It does > *significantly* add to the I/O time. > > > And if I changed the fs type for /usr to vinum, will that mess up > > any other programs that might store data to /usr? > > The fs type relates to a partition, not a file system. > > Greg > -- > When replying to this message, please copy the original recipients. > For more information, see http://www.lemis.com/questions.html > Finger grog@lemis.com for PGP public key > See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message -------------------------------------------------------------------------= ------- www@FreeBSD.org ------=_NextPart_000_0086_01C00142.0E5EFF70 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META content=3D"text/html; charset=3Diso-8859-1" = http-equiv=3DContent-Type> <META content=3D"MSHTML 5.00.2314.1000" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>Sorry for the repost. But I = figured that the=20 topic in the last past really didn't represent the issue I'm having now, = as this=20 one is a new one, as opposed to my last post which was a Re: of my = original=20 issue :-P</FONT></DIV> <DIV> </DIV> <DIV><FONT face=3DArial size=3D2><PRE>Oops. I fluffed up a little. I'm = too young to be losing my memory. Oh well. I have / =3D 50M, /var =3D 20M, swap =3D 773M, and /usr takes up the = remaing 8900M or so. I didn't arbitrarily pick these values -- I let /stand/sysinstall do = that for me. I have a total of 6 IDE drives. All of which are 10GB in size. I want = to have two striped plexes of 3 subdisks each. The second plex mirroring the = first. Working well into the morning, I think I made some serious headway. I = can create 5 of the 6 drives from my physical HDDs. The one that fails (vinum told = me so) is the main HDD. I'm guessing I'm having trouble making /usr part of a plex = because it is in use at the time. I persevered regardless, and built the volume, and = then it segfaulted and FreeBSD restarted. I'm assuming this is because that = first drive was never really initialized as a drive. Hope I provided sufficient information to get a useful answer :-) Thanks again, -Kevin Greg Lehey wrote: > On Monday, 7 August 2000 at 12:07:22 -0400, Kevin Menard wrote: > > Hi, > > > > I have thoroghly RTFM, but still have a question about vinum. = I realize that / > > cannot be mirroredd. I would imagine I would not want to = mirror swap space and > > /var, simply because they change so frequently and that would = put unneeded > > stress on the CPU. > > If you lose swap, you can crash your system. > > > Plus it really just doesn't make all that much sense to mirror > > temporary data. > > That depends on how important it is while it's there. > > > My question is this though. If I have a 9770M drive, with a / = =3D > > 20M, /var =3D 50M, swap =3D 777M, and /usr =3D the rest, how = would I go > > about mirroring the rest of the drive? > > With 20 MB /, I don't think you'd get that far. Take at least 40 = MB. > And I'd be interested to know how you know that you need exactly 50 = MB > /var. > > > I mean, there's about 9 gigs of /usr data that could be = mirrored. > > How many disks do you have? For mirroring you need at least 2. > Mirroring on the same drive doesn't buy you much, just the = possibility > to recover from uncorrectable sector data errors. It does > *significantly* add to the I/O time. > > > And if I changed the fs type for /usr to vinum, will that mess = up > > any other programs that might store data to /usr? > > The fs type relates to a partition, not a file system. > > Greg > -- > When replying to this message, please copy the original recipients. > For more information, see <A = href=3D"http://www.lemis.com/questions.html">http://www.lemis.com/questio= ns.html</A> > Finger grog@lemis.com for PGP public key > See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message </PRE> <HR> <ADDRESS><A=20 href=3D"http://docs.freebsd.org/mailto.html">www@FreeBSD.org</A><BR></ADD= RESS></FONT></DIV></BODY></HTML> ------=_NextPart_000_0086_01C00142.0E5EFF70-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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