Re: Using a hard drive without partitions

From: Nikolas Britton (nikolas.britton_at_gmail.com)
Date: 07/30/05

  • Next message: J.D. Bronson: "Re: correct syntax for openssl 0.9.8 in port"
    Date: Sat, 30 Jul 2005 12:58:24 -0500
    To: "Gary W. Swearingen" <garys@opusnet.com>
    
    

    On 7/30/05, Gary W. Swearingen <garys@opusnet.com> wrote:
    > Nikolas Britton <nikolas.britton@gmail.com> writes:
    >
    > > Drive:
    > > Dangerously dedicated
    > > /dev/da0s1
    > > newfs -O2 -U
    >
    > I think you're using "dangerously dedicated" wrongly. A DD disk is one
    > which has no standard partition table in the MBR; the "disklabel"
    > sectors (16) start at sector 0 (or with your no-secondary-partitions-
    > either method, your filesystem would start there (newfs /dev/da0)).
    >

    But in FreeBSD your disk needs a slice otherwise it's not compatable
    with fdisk / bsdlabel / growfs... I think.

    > You've got a standard partition table with the s1 entry in use, which
    > is not "dangerous". The FAQ has an entry on DD disks.

    But it is "dangerous" because it starts at sector 0. I've read that
    FAQ as well as greg's book, Lucas's book, unix power tools, the man
    pages, handbook, etc. I will reread them again.

    >
    > I can't say much about your main question; I've never heard of doing
    > it. It sounds less "dangerous" than putting a FS in a file, like
    > we do with ISO filesystems all the time.
    >

    Yea that's the problem ;-)..... I've never heard of doing it like that
    too but it does work.

    I'm going to be working on this server today and I'll post some of the
    details of fdisk, bsdlabel, etc. to see if I can help clarify things.

    Thanks
    _______________________________________________
    freebsd-questions@freebsd.org mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-questions
    To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"


  • Next message: J.D. Bronson: "Re: correct syntax for openssl 0.9.8 in port"

    Relevant Pages

    • Re: Fwd: FreeBSD 7.1 Content
      ... notion that 'real men' figure out cylinder and slice offsets themselves. ... But the most common usage is simply "fdisk -BI" to ... And bsdlabel is actually quite ... if the "c" partition doesn't cover the whole slice. ...
      (freebsd-stable)
    • Re: RELENG_8 regression: cannot detect partitions (now with boot -v)
      ... :) Can you run (from a rescue disk or 7-STABLE): ... The bsdlabel and fdisk were attached to the first message, ... Unexpected attachment on this mail? ...
      (freebsd-current)
    • Re: Corrupted OS
      ... then fdisk and bsdlabel will be happy to work on it. ... bsdlabel -w -B da0s1 ... As for the corrupt OS, I don't understand what that is and why ...
      (freebsd-questions)
    • Re: Corrupted OS
      ... Once everything on that disk is unmounted ... then fdisk and bsdlabel will be happy to work on it. ... The problem *is* a corrupt OS. ...
      (freebsd-questions)
    • Re: no ad1s3a,b,d... on ad1s3 after bsdlabel
      ... I thought that it is enough to overwrite first 1M of slice with zeros. ... fresh bsdlabel appeared on it. ... I deduced from it that fdisk is necessary only for dedicated and new ... The data for partition 1 is: ...
      (freebsd-questions)