On Fri, 7 May 1999, Philip Tait wrote:

> A net booted installation of 1.3.3 on a 5000/200 went well, until I
> tried to redo the disklabel on the second disk (a DEC DSP5350S).  The
> system had previously been using 1.3_BETA, and I wanted to start clean.
> 
> I used the 'sysinst' trick, to disklabel and newfs the second disk.
> Unfortunately, somewhere during this process, the disk now has a
> disklabel for a 70Gbyte disk.  When I try to write a correct disklabel,
> I can't seem to get around the infamous 'disklabel: ioctl DIOCWDINFO:
> Open partition would move or shrink' message.

Of corse - check the numbers.

> I have tried making a disktab entry, then using it to write (in turn) to
> /dev/rrz2a, /dev/rrz2c, etc, as suggested in previous discussions on
> this list.
> 
> Any suggestions would be welcome.
> 
> Here is the dmesg entry for the disk:
> 
> rz2 at asc0 drive 2 slave 0 DEC DSP5350S rev 427B
> rz2: 3406MB, 3055 cyl, 25 head, 91 sec, 512 bytes/sect x 6976375 sectors
> 
> And here is the output of 'disklabel rz2':
> 
> type: unknown
> 
> disk: mydisk2
> label:
> flags:
> bytes/sector: 512
> sectors/track: 91
> tracks/cylinder: 520
> sectors/cylinder: 47320
> cylinders: 3055
> total sectors: 144562600

Are you sure this is the same disk? These #'s DON'T match above for total
sectors.

> rpm: 3600
> interleave: 1
> trackskew: 0
> cylinderskew: 0
> headswitch: 0           # milliseconds
> track-to-track seek: 0  # milliseconds
> drivedata: 0
> 
> 8 partitions:
> #        size   offset    fstype   [fsize bsize   cpg]
>   a:    94640        0      4.2BSD     1024  8192     0   # (Cyl.    0 -
> 1)
>   b:   189280    94640        swap                        # (Cyl.    2 -
> 5)
>   c: 144562600        0      unused        0     0         # (Cyl.    0
> - 3054)
>   d: 144278680   283920      4.2BSD     1024  8192     0   # (Cyl.    6
> - 3054)
> 
> Here is my disktab entry:
> 
> DSP5350S|DEC DSP5350S:\
>         :dt=SCSI:ty=winchester:\
>         :nc#3055:nt#25:ns#91:\
>         :su#6976375:\
>         :se#512:\
>         :pa#65536:oa#0:ta=4.2BSD:ba#8192:fa#1024\
>         :pb#131072:ob#65536:tb=swap:\
>         :pc#6976375:oc#0:tc=unused:\
>         :pd#6779767:od#196608:td=4.2BSD:bd#8192:fd#1024\
>         :pe#0:oe#0:te=unused:\
>         :pf#0:of#0:tf=unused:\
>         :pg#0:og#0:tg=unused:\
>         :ph#0:oh#0:th=unused:

The best thing to do would be to use disklabel -e to modify the c
partition (and cylinder info, etc). Then try the disktab.

It might be easier to just write all zeros to the begining of the disk &
reboot. It looks like a corrupt disklabel got in there.

Take care,

Bill