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Date:      Fri, 12 Jan 2001 00:39:54 -0600 (CST)
From:      Cary <scattered@babel.acu.edu>
To:        Greg Lehey <grog@lemis.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: disklabel/newfs
Message-ID:  <Pine.LNX.4.10.10101120024160.28338-100000@babel.acu.edu>
In-Reply-To: <20010112110113.C21945@wantadilla.lemis.com>

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Greg, thank you for the explanations.  Below is the partition info you
requested:

#disklabel -r /dev/da0
[snip]
3 partitions:
#        size   offset    fstype   [fsize bsize bps/cpg]
  a:   247808        0    4.2BSD        0     0     0   # (Cyl.    0 -
120)
  c:   247808        0    unused        0     0         # (Cyl.    0 -
120)
#

(one short question: why does it say 3 partitions and list only 2? I know
c is supposed to represent the whole disk, and a is the first partion, so
what am I missing?)

#dmesg
[snip]
da0 at ahc0 bus 0 target 0 lun 0
da0: <RICOH RO-3012E 8.00> Removable Optical SCSI-2 device
da0: 5.000MB/s transfers (5.000MHz, offset 15)
da0: Attempt to query device size failed: NOT READY, Medium not present

Ahh, I see there is an offset of 15, where would that be placed in the
disklabel or in disktab?  

I hope this helps.  Thank you agian.

Cary Mathews

Abilene Christian University
ACM Education Comittee


On Fri, 12 Jan 2001, Greg Lehey wrote:

> On Thursday, 11 January 2001 at 17:48:48 -0600, Cary wrote:

> > The drive is a SCSI magneto-optical drive at /dev/da0, the MO disks
> > are 128MB a piece, formerly with ext2 formats. I can read the disk
> > label with:
> >
> > # disklabel -r /dev/da0
> >
> > under disktab, I have created my own entry called ro3012e, with the drive
> > parameters.  so when I say:
> > # disklabel -w da0 ro3012e
> > disklabel: No space left on device
> > # disklabel -w /dev/da0 ro3012e
> > disklabel: Operation not supported by device
> >
> > After trying several variations of the above, I then try:
> >
> > [moved below]
> >
> > What do these errors mean, especially the last one?  What am I
> > missing?  Thank you in advance for any help offered!
> 
> > # newfs da0
> > newfs: da0: `0' partition is unavailable
> > # newfs /dev/da0
> > newfs: /dev/da0: `0' partition is unavailable
> > # newfs -T ro3012e /dev/da0
> > newfs: /dev/da0: `0' partition is unavailable
> 
> These are parse errors, caused by an incorrect assumption that the
> name you supplied was a partition name.
> 
> > # newfs -T ro3012e /dev/da0a
> > newfs: /dev/da0a: Invalid argument
> 
> This means (probably) that partition a is not a ufs partition.
> 
> > # newfs -T ro3012e /dev/da0c
> > write error: 247807
> > newfs: wtfs: Invalid argument
> > #
> 
> This suggests that your c partition is too big for the disk.
> 
> So what does the partition table info at the end of the drive look
> like?  What does dmesg say?  I'm looking for information like this:
> 
>   8 partitions:
>   #        size   offset    fstype   [fsize bsize bps/cpg]
>     c: 35551782        0    unused        0     0         # (Cyl.    0 - 2212*)
>     h: 35551782        0    4.2BSD     1024  8192    16   # (Cyl.    0 - 2212*)
> 
>   da0 at ahc0 bus 0 target 8 lun 0
>   da0: <QUANTUM QM318000TD-SW N491> Fixed Direct Access SCSI-2 device 
>   da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit)
>   da0: 17366MB (35566500 512 byte sectors: 255H 63S/T 2213C)
> 
> Greg
> --
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