[Simh] Large tape device? (was Devices and device names in simh?)

[Edward Berry]

Can I get a simulated tape device with large capacity?

I made images of real savesets from tape up to ~2 GB and they work fine.
but if I start with a blank tape, either letting simh create the file or
creating it with dd</dev/zero, then try to backup a disk to it, it fills
after about 98 MB and asks for the next volume.

SHow dev says TQ is TK50 (any other devices available? exabyte, dat,
and dlt don't seem to work.)

(Apologies if this is well-described in the faq or readme, I did
try to find it)

Thanks,
Ed

==================================================================


Yes- with the definitions like $ Define/System/Exec dia0 dua0:
in SYS$SYSDEVICE:[SYS0.SYSCOMMON.SYSMGR]SYLOGICALS.COM
the system comes up and mounts all its old disks.
Most of the command files refer to the disks by their
labels anyway, like disk$data1, so the different device
names will not be a problem. Everything I need is working
great.
There are some self-perpetuating batch jobs in the que,
one is doing incremental backups every day to savesets on
a big disk, that works fine.
Another is trying to do full backup of 4 disks to a
tape device, and that is not practical with 100 MB tapes.

I realize it would be easier now to dismount the virtual disks
and copy the image files under unix, but I'd like to have it
running as original.



Zane H. Healy wrote:
> Try putting it in SYLOGICALS.COM rather than SYSTARTUP_VMS.COM (exact names
> are dependent on version).
> 
> Zane
> 
> 
>> Thanks, that works great in a simple command line test:
>> $ Define/System/Exec dia0 dua0:
>> $ dir dia0:[000000]
>> Directory DUA0:[000000]
>>  . . .
>> If I have time tonight I'll put it at the very beginning of the startup 
>> file and see how many errors disappear.
>>
>> Ed
>>
>> Hittner, David T. wrote:
>>> No, you can't rename the device at the SIMH level. I've had this problem
>>> before, with both real and SIMH VAXes.
>>>
>>> Use a system logical in VMS system startup to define a synonym for a
>>> similar device: Example:
>>>  $Define/System/Exec dia0 dua0:
>>>
>>> You need to be careful about using the colon; sometimes it works and
>>> sometimes not - after a  little experimentation you will get it right.
>>> Depending on VMS version and use, the synonym may also require a
>>> preceding underscore.
>>>
>>> If you can't figure out the syntax, email me, and I'll dig a real DIA0
>>> synonym out of my VMS system archives.
>>>
>>> Dave
>>>  
>>>
>>> -----Original Message-----
>>> From: simh-bounces at trailing-edge.com
>>> [mailto:simh-bounces at trailing-edge.com] On Behalf Of Edward Berry
>>> Sent: Wednesday, July 11, 2007 5:09 PM
>>> To: simh at trailing-edge.com
>>> Subject: [Simh] Devices and device names in simh?
>>>
>>> Dear all,
>>> I am restoring a historic (well, to me at lest) vax configuration from
>>> stand-alone-backup tape to the simulator.
>>> It seems to be working, but how much flexibility do I have in device
>>> names?
>>>
>>> In the original configuration, the system disk was DIA0.
>>> After googling I understand the naming convention a little, and
>>> apparently DIxx is a disk mounted in a DSSI cabinet, not on the local
>>> scsi bus.
>>>
>>> I read the tape on a linux machine, enblocked it and mounted as MUA0,
>>> and restored the system disk with backup/image. No errors.
>>>
>>> Then I attach the restored system disk as DUA0: and boot it.
>>> Amazingly it actually came up and let me log in with system password.
>>> But there were lots of error messages.
>>> Most serious had to do with device names: DIA0-1 and the ethernet
>>> adapter which in the orig machine was (#VMS_Device se0) EZA0 on simh it
>>> is XQA0:
>>>
>>> For the sake of an authentic restoration, and to save me from editing
>>> all the config files, is there any way to have a disk image mounted as
>>> DIAx, and to have the enet adapter be EZAO?
>>>
>>> Thanks for any suggestions,
>>> Ed
>>> _______________________________________________
>>> Simh mailing list
>>> Simh at trailing-edge.com
>>> http://mailman.trailing-edge.com/mailman/listinfo/simh
>>>
>>>   
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> 
>