Re: setting a disk read only

From: Kjell Midtseter (freebsd2_at_c2i.net)
Date: 06/30/04

  • Next message: Edd: "Hanging on shutdown" 
    To: Matthew Seaman <m.seaman@infracaninophile.co.uk>
Date: Wed, 30 Jun 2004 07:53:35 +0200

    On 26 Jun 2004 at 10:44, Matthew Seaman wrote:

    > On Sat, Jun 26, 2004 at 02:38:28AM +0200, MICSKO Viktor wrote:
    >
    > > Is it possible to setting a *whole* disk read only? I mean the way linux
    > > does it with "hdparm -r 1 device". So adding an -o ro parameter to mount
    > > isn't enough, I want to be sure that the disk is unmodified.
    > >
    > > (I have to access an existing raid of 8 disks using vinum without any
    > > modified bit, because of the highly sensitive data. Any idea doing this
    > > absolutely securely is welcome too)
    >
    > Hmmm... SCSI disks can be physically jumpered to be read-only. I
    > should think that ATA drives can be treated the same way. Consult the
    > manufacturers' data sheets for details.
    >
    Some time ago there was an article in the Elektor Magazine.
    They broke a line in the ATA cable and brought it to a switch on the front,
    with a pullup resistor on the disk side.
    The switch was labeled 'normal operation' and 'read only'
    Could be the hard way to do it. Literally.
    Kjell

    _______________________________________________
    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: Edd: "Hanging on shutdown"