>I realized something, even if I do get this working, I'm going to need to
>partition one of the ESDI hard drives since they are to big for RT-11,
>according to the WQESD controllers documentation the partitions need to
>be 30Mb or smaller. My smallest ESDI drive is 150Mb.
By default, if your disk is larger than 65535 blocks, the physical unit
numbers for the DU device map to partition zero (0-65534) of the
selected physical unit. If you want to map another unit of the DU
handler to another partition, you issue the command:
SET DUn UNIT=m part=p
where 'n' is the RT-11 unit number, 'm' is the physical unit number in
your MSCP configuration, and 'p' is the partition number (starting at
zero).
For example, say I have an RQDX3 with an RD54 (169mb) and an RX50
(dual drive):
DU0 = Partition zero (0-65534) on phys unit 0 (rd54)
DU1 = First of the RX50 drives
DU2 = Second of the RX50 drives
If I want address more of the RD54, I can do the following:
DU0 = Partition zero (0-65534) on phys unit 0 (rd54)
DU1 = First of the RX50 drives
DU2 = Second of the RX50 drives
DU3 = unassigned
DU4 = Partition one on phys unit 0
(set du4 unit=0 part=1)
DU5 = Partition two on phys unit 0
(set du5 unit=0 part=2)
DU6 = Partition three on phys unit 0
(set du6 unit=0 part=3)
DU7 = Partition four on phys unit 0
(set du7 unit=0 part=4)
This is, in fact, how many partitions you would get on an RD54. All
of the partitions except the last one will be full 65535 block units.
The last one is about 7k blocks.
Megan Gentry
Former RT-11 Developer
p.s. I forgot... after doing all these SET commands, you'll have to
reboot for them to take affect.
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
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Received on Thu Oct 15 1998 - 21:00:53 BST