Date: Mon, 22 Jun 1998 08:17:47 +1000 From: Robert Chalmers <robert@chalmers.com.au> To: Joerg Wunsch <joerg_wunsch@uriah.heep.sax.de> Cc: freebsd-scsi@FreeBSD.ORG Subject: Re: scsiformat reporting different speed to disklabel Message-ID: <358D868B.A4751765@chalmers.com.au> References: <357CAD4C.16055D8A@chalmers.com.au> <19980621194949.YQ56000@jette.heep.sax.de>
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Hi,
thanks for the info. I have managed to work it all out, and can now disklabel a
disk using only the disktab entry and the command "disklabel -r -w /dev/rsd1c
C2490A sd1s1", C2490A being the appropriate disktab. The one thing I can't get
rid of however, is the warning from the kernel,
/kernel: sd1: invalid primary partition table: no magic
Remember, this is a second hard disk drive, dedicated to freeBSD. The
Primary/root hdd is also a fully dedicated Freebsd system.
I tried doing a disklabel -B sd1, but of course that created a boot block, and
FreeBSD then tried to boot of both disks.... a near disaster....
So, as soon as I figure out how to get reid of that message, I'll have the
complete details of how to build a second (or more ) hadrd disk and can write
it up.
I'm trying to get this done without using fdisk.... but it seems fbsd doesn't
work that way. I don't know.
Thanks for your help,
cheers
Robert
J Wunsch wrote:
>
> As Robert Chalmers wrote:
>
> > using scsiformat -p d sd1 reports a
> > Medium rotation Rate of 6400.
>
> This is supposed to be the correct number.
>
> > Is this the rpm: that is reported by disklabel?
>
> disklabel only and always defaults to 3600, nothing else, unless
> you've actually created the label using an entry in /etc/disktab,
> or at least edited the value with disklabel -e.
>
> This value in the disklabel historically has been used for
> layout-based access optimizations, but this is no longer really
> applicable for modern disks, so the value's meaningless these days.
>
> > Also: on the same thing, reported information, the number of actual
> > sectors calculated is different to the total sectors reported?
>
> The SCSI mode page reports the total amount of blocks. Depending on
> the actual strategy, you aren't able to use all of them (e.g. due to
> prehistoric assumptions of fdisk slices being aligned to something
> like a cylinder boundary). The difference in your case is weirdly
> large, however.
>
> --
> bye, J"org
>
> ...just travelling around. Don't try reaching me except by mail. :)
>
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