Re: Booting a 5000/240 from CD

Hi Anders,

Thanks. I've tried as you said and now the installation system boots
fine from the HDD.

Louis.

Anders Hogrelius wrote:
>
> I believe the problem is that you have a valid disklabel when you try
> to write the image to the disk. I've come across this problem before,
> though on other platforms running *BSD. Try to wipe the disklabel by
> writing zeros to /dev/rsdXc, reboot and then try to write the image to
> /dev/rsdXc
>
> It is important that you write the image to the raw device, thus rsd
> rather than sd. Also, slice c is the whole disk on most platforms with
> i386 being one exception. The c (or d on i386) slice is automatically
> assumed to be the whole disk by the kernel even if there isn't a valid
> disklabel present.
>
> Cheers,
> Anders
>
> ****************************************************
> Anders Hogrelius, MSc
> Senior Exploration Geologist
> TM Resources AB (Tumi Resources ltd)
> Dr Christinas väg 13
> SE-733 36 Sala
> SWEDEN
>
> Phone: +46 (0)224 77820
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>
> On Wed, 7 Nov 2007, Louis Wevers wrote:
>
>> Hi,
>>
>> Ok, I've gotten to the part of trying to write the image to a spare
>> drive. First I emptied the whole disk and created a partion on it
>> using disklabel and formatted it using newfs. The output of "dislabel
>> -r sd5" looks like this:
>>
>> # disklabel -r sd5
>>
>> # /dev/rsd5c:
>> type: SCSI
>> disk: RZ58     (C) DE
>> label: NetBSD
>> flags:
>> bytes/sector: 512
>> sectors/track: 85
>> tracks/cylinder: 15
>> sectors/cylinder: 1275
>> cylinders: 2112
>> total sectors: 2698061
>> rpm: 3600
>> interleave: 1
>> trackskew: 0
>> cylinderskew: 0
>> headswitch: 0           # microseconds
>> track-to-track seek: 0  # microseconds
>> drivedata: 0
>>
>> 5 partitions:
>> #        size    offset     fstype  [fsize bsize cpg/sgs]
>> a:   2698061         0       boot                      # (Cyl.    0 -
>> 2116*)
>> c:   2698061         0     unused      0     0         # (Cyl.    0 -
>> 2116*)
>>
>> So, then I tried to write the image to it using dd:
>>
>> # dd if=/dev/cd0a of=/dev/sd5a
>> dd: /dev/sd5a: Read-only file system
>> 4+0 records in
>> 3+0 records out
>> 1536 bytes transferred in 0.131 secs (11725 bytes/sec)
>>
>> I also tried using /dev/rsd5a as device and using a chmod 777 on
>> /dev/sd5a; all with the same result. So, poking around a bit I tried
>> using installboot to write anything to the disk:
>>
>> # installboot -v /dev/rsd5a /usr/mdec/bootxx_ffs
>> File system:         /dev/rsd5a
>> File system type:    raw (blocksize 8192, needswap 0)
>> Primary bootstrap:   /usr/mdec/bootxx_ffs
>> Bootstrap start sector: 1
>> Bootstrap sector count: 15
>> Bootstrap load address: 0x80700000
>> Bootstrap exec address: 0x80700000
>> Writing bootstrap
>> Writing boot block
>> installboot: Writing `/dev/rsd5a': Read-only file system
>> installboot: Set bootstrap operation failed
>>
>> So, the big question that remains for me is, how do I get my
>> filesystem not to be read-only?
>>
>> Many thanks in advance.
>>
>> Louis
>>
>> Henry Bent wrote:
>>> On Mon, 5 Nov 2007, Louis Wevers wrote:
>>>
>>>> Hi,
>>>>
>>>> Perhaps a bit stupid question, but I can't seem to figure it out. I
>>>> try
>>>> to boot my 5000/240 from a freshly created CD (created from the ISO
>>>> image available from the NetBSD site).
>>>>
>>>> I tried something like: "boot 3/rz0" and "boot 3/rz0/netbsd"
>>>>
>>>> Unfortunately it only comes back to me with something like: "?IO:
>>>> 3/rz0
>>>>        (cmd: rd)"
>>>>
>>>> When I boot the installed 1.6 on the machine, I can read the CD
>>>> properly. file structure looks normal etc.
>>>>
>>>> Any ideas on how to boot the machine from CD?
>>>>
>>>> Many thanks in advance,
>>>> Louis
>>>>
>>>
>>> Hi Louis,
>>>
>>> You need a CD-ROM drive that can do 512 byte hardware sectors if you
>>> want
>>> to boot from it.  There's a list of them at
>>> http://home.comcast.net/~safeharborbay/c128/scsi/suncds.html but I have
>>> no affiliation with that site and can't guarantee anything.  I
>>> personally
>>> have used RRD42s and various Toshiba models in the past.
>>>
>>> If that fails and you have an extra SCSI hard drive, you can just dd
>>> a CD
>>> image to the hard drive and boot off of that.  I've done it a few times
>>> and neither Ultrix nor NetBSD seem to mind that you're not using a real
>>> CD-ROM.
>>>
>>> -- 
>>> Henry Bent
>>> [email protected]
>>>
>>>
>>
>>