RT11 sysgen and disk partitions
Gordon JC Pearce
gordon at gjcp.net
Wed Mar 9 14:55:35 CST 2005
> Jerome Fine replies:
> Once done, the SET command values are held in the
> DU.SYS device driver file. You do NOT need to
> do the SET commands each time. Probably not
> recommended in any case.
Ahaaa... Is that saved in DU.SYS when you issue the commands, then? Makes
sense. I'll try it when I get home.
> Assuming you are booting from an RL02, then the
> DU.SYS device driver my be LOADed for a bit faster
> response after the first usage. In addition, I
> strongly suggest you use RT11FB rather than RT11SJ
> unless the added size of the RT11FB monitor has
> a serious impact on the program which you run.
Well, the idea is to load TSX-Plus over it, which requires the SJ monitor.
> In addition, it would be helpful to know the full
> version number of the RT-11 version which you are
> using. Based on the above SET commands, it must
> be at least V05.03 or RT-11 which was released
> in 1985. There are certain features which later
> versions of RT-11 have that you may wish to be
> aware of. the RT-11 command:
> SHOW CONFIG
> will provide the information, as will the banner
> when RT-11 first boots.
On bootup, and in SHOW CONFIG, the version is given as 5.00.
> Finally, I strongly recommend against the SET
> values which have been suggested since they
> impact very negatively with regard to booting
> RT-11. You will not lose anything with a
Ok, why is that?
> different combination of SET parameters, but
> you will gain with respect to what drives
> can be booted, in particular from a cold start.
In this instance I want to boot from a "clean" install of RT-11 from DL0,
but eventually I will be booting from DU0.
> The exact nature of which disk drives are being
> used will also help. I suspect an RD53 and an
> RX50, but please confirm. Most novice RT-11
OK, this is where it gets tricky. I'm not totally sure how to identify
the ST506 drives fitted to the machine. One is a full-height 5.25" drive,
with (seemingly) about 65,000 blocks on each partition. The other is
half-height, with considerably less on each partition - one is around
40,000 blocks, one is around 16,000 blocks (if I remember correctly - I'm
not actually near the machine right now to check). The smaller drive is
made by Fujitsu, may be something like M224XAS ? The label is rather hard
The other drives are an RL02 (I have two but lack the cable that links the
two drives) and an RX02.
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