VAX-11/780 boot disk

From: ajp166 <ajp166_at_bellatlantic.net>
Date: Thu Jan 25 20:44:12 2001

From: Jerome Fine <jhfine_at_idirect.com>
>Jerome Fine replies:
>
>Just curious - if you are referring to software distributions and
especially
>RT-11 (maybe I am confused), in most cases, the RL02 will not be filled


I had other non RT-11 stuff... Also I have a RT-11 disti that is the
high
priced spread (macro with comments) and that does fill the disk. The
standard V5.x BIN disti is maybe 30% of the disk.

With say RT-disk I'd archive (same for RSTS) is to do a SQueeze.

Of course you want to image copy (RSX) and unix V7.

>Of course if the RL02 was full, Allison is correct that a single RD52
>will hold only 3 RL02 disk packs and in much less volume.


I know. ;) Though a few were partitioned so I could run them as
if they were nominal RL02. That wastes space if they were to be pure
archival.

>Currently, I have managed to find a very OLD Magneto Optical disk
>drive with cartridges that hold 295 MBytes (8.75 RT-11 partitions)
>on each side. That is the equivalent of 26 RL02 disk packs on
>each side or a total of 52 RL02 disk packs on the MO cartridge


That works. I also have that archive on DLT (TK50).

>I also duplicate important cartridges. I suspect that the MO cartridges
>will last longer that the MO disk drives. Of course, I also had to
>acquire a SCSI host adapter as well - considerably more costly
>than 8 free RD52 drives, but each MO cartridge is MUCH smaller
>that the 17 RD52 disk drives it replaces.


Yep, though the RD52s are likely the most reliable of the pack
and if the problem is not in the HDA a board swap is possible.
It was a direct approach.

Next pass will be to move them to a PC with a Cdburner.


Allison
Received on Thu Jan 25 2001 - 20:44:12 GMT