[Simh] moving disk images

Thomas Pfau pfau at nbpfaus.net
Wed Dec 3 17:50:14 EST 2008


Just for some closure on this...

I was playing with this today and noticed that after attaching the disk
files the devices were still identified as RD54s.  I set them to be
RA92s before attaching the disk files and the simulator was able to boot
the disk.  Files were transferred from linux to VMS using image mode FTP.

Hittner, David T. wrote:
> If you moving to Alpha VMS, it's likely a record attribute difference.
>
> Create a disk file using the VMS system and compare the record attributes to
> the one you copied.
> If they differ, use the SET FILE command to fix the record attributes.
>
> Dave 
>
>   
>> -----Original Message-----
>> From: simh-bounces at trailing-edge.com 
>> [mailto:simh-bounces at trailing-edge.com] On Behalf Of Thomas Pfau
>> Sent: Tuesday, July 08, 2008 10:42 AM
>> To: Jason Stevens
>> Cc: simh at trailing-edge.com
>> Subject: Re: [Simh] moving disk images
>>
>> I'm trying to move a VAX image from an Intel linux system to 
>> an Alpha running VMS.  Both systems should be little endian.  
>> A dump of the first couple of blocks after transferring to 
>> the Alpha looks ok.
>>
>> Jason Stevens wrote:
>>     
>>> I've moved images between various x86 OS's (MS-DOS, Windows, OpenBSD), m68k (NeXTSTEP), ppc (OS X)...
>>>
>>> I wonder if on your target somehow it's "helping" you by doing an 
>>> endian swap & screwing it up....
>>>
>>> You can quickly cobble up something to read two bytes from a file, 
>>> swap them and write it back out to disk.....
>>>
>>> On Tue, Jul 8, 2008 at 10:23 AM, Thomas Pfau 
>>>       
>> <pfau at nbpfaus.net> wrote:
>>     
>>>> Should I be able to move a disk image from a linux machine to a Windows or OpenVMS Alpha machine and use it?  I am trying to move my system disk to another computer but it won't boot.  The simulator halts at 4C02.  I have tried copying the file using ssh.  
>>>>         
>> That didn't work so I tried adding the disk image to a zip file and transferring that.  That didn't work so I tried putting it in a tar file.  Still doesn't work.  Is the disk image format different on different 
>> architectures?
>>
>>
>> --
>> tom_p
>> http://nbpfaus.net/
>>
>>     




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