28 May
2012
28 May
'12
4:35 p.m.
I thought that I sent this earlier today. Did anyone receive it? I don't
remember receiving a copy as I usually do. Plus Netscape always
places a copy in my sent file and it is not there either - odd!!!
The only person I have ever heard of who has run with
a drive larger than 8 GB on RT-11 was Tim Shoppa.
At one point, I seem to remember that Tim was using
a 9 GB Seagate SCSI hard drive.
As far as I know, RT-11 does not care about the
capacity of the drive. However, the DEC version
of the software (starting with V05.03 of RT-11)
can be used to access up to 256 physical partitions
of 32 MB each. My math calculates that to be a total
of 8 GB. The limitation on the number of partitions
is that the DEC version of the DU(X).SYS device
driver uses only a byte for the partition number.
I also seem to remember that at some point, RT-11
also supported 32 bit block numbers.
So RT-11 will easily access up to 8 GB of a MSCP
compatible hard drive and supports larger drives as
well. If anyone has a drive larger than 8 GB which
is being used under RT-11, it should be rather easy
to increase the number of partitions supported to
65536 by using a word for the partition number.
Jerome Fine
Johnny Billquist wrote:
On 2012-05-17
10:00, Holm Tiffe<holm at freibergnet.de> wrote:
Hi,
does someone has a newer firmware Version for the UC07 as G143R?
I have a double UC07 in my 11/83 and have problems to get Disks
with 4Gbytes working. (DCAS-34330 50 pin). I have an Conner CFP2107S
wich has 2 Gigabytes, I can split the drive and successfully format
the resulting drives with XXDP or RT11. When I connect the 4GB Disks,
even
when I fake the geometry to 2Gbytes, the controller successfully
formts and
thest the drives, but an init du0: from updat in xxdp doesn't come back.
same with mdup.mu from an RT11 tape. It simply hangs.
Disk space isn't the concern why I'm trying to use the IBM drives, those
disk are quiet comparing to the conner 2107s, that is what I want.
Any Ideas?
Sounds like there is nothing wrong with your controller. I would
suspect the software have problems with such large disks... Not that
uncommon actually. It wasn't until RSX-11M-PLUS V4.6 that RSX
correctly handles disks larger than the max capacity of the OS (which
is 8GB for RSX, by the way, but most other OSes have smaller maxes).