Just to be clear, I’m looking to backup a physical machine, to a virtual tape
drive, such that I can restore the data to either SIMH or a Physical machine.
I don’t need to extract files. I can extract files (and I have with some of
the most critical) via NFS to my Mac.
Except for legacy hardware, most tapes I dealt with in the 90’s were in the
20-40GB range. Current tapes now are multi-Terabyte, but not something most of
us can afford to have at home, which is why I’m looking to go this route.
Zane
> On Jan 25, 2018, at 5:39 AM, Tim Shoppa <tsho...@gmail.com> wrote:
>
> A couple of the tape image utilities I wrote or updated in the 1990s have
> that limit. Let me see if they are still in the SIMH utility tree. They never
> would’ve bitten me back in the 90s because the biggest reels I ever dealt
> with were 3600 feet at 6250 BPI, less than 250 Mbytes.
>
> Tim
>
> On Jan 25, 2018, at 8:23 AM, Johnny Billquist <b...@softjar.se
> <mailto:b...@softjar.se>> wrote:
>
>> Hmm. None of the tools I wrote ever had that limit. They just process
>> records and don't give a damn about absolute disk or tape position.
>>
>> Johnny
>>
>>
>> Tim Shoppa <tsho...@gmail.com <mailto:tsho...@gmail.com>> skrev: (25 januari
>> 2018 00:53:34 CET)
>> Many common tape image tools as of two decades use 32-bit integers to carry
>> offsets around and will be limited to 4Gigabyte tape image sizes.
>>
>> I don't think this is a fundamental limit to the tape image formats used by
>> SIMH, just a common limitation of the tape image tools you might find from
>> 20 years ago.
>>
>> Tim.
>>
>> On Wed, Jan 24, 2018 at 5:02 PM, Zane Healy <heal...@avanthar.com
>> <mailto:heal...@avanthar.com>> wrote:
>> What type/size of tapes does the VAX emulation support? I was looking
>> through the doc’s and it wasn’t obvious to me. Is there a size limit?
>>
>> Thanks,
>> Zane
>>
>>
>>
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