Hi,
we are using QNX 2.21 on a Pentium 133. For one year we need to us a
machine with much more of power. Are there any limitations? Can we us
Pentium 1000 or more or less?
Another question: on the old machine there is an ESDI drive with a smart
cache card (a controler with 4.5 MB hardware cache). IIRC there was also
such for SCSI drives. We noticed that a pure SCSI drive without such
hardware extensions are too slow. Are onthis days any controlers and
drivers for the good old QNX 2?
THX
Georg
Georg Pohl <pohl.wvz@klosterfrau.de> wrote:
Hi,
we are using QNX 2.21 on a Pentium 133. For one year we need to us a
machine with much more of power. Are there any limitations? Can we us
Pentium 1000 or more or less?
Well its worth a shot, however, there have been speed issues with
‘fast systems’ when the original Pentium’s came out. Well increase
all latency timers, turn off all cacheing and see how things work. If
there are problems, underclock the processor until it is ok.
Also make certain you are running the speed patch.
Another question: on the old machine there is an ESDI drive with a smart
cache card (a controler with 4.5 MB hardware cache). IIRC there was also
such for SCSI drives. We noticed that a pure SCSI drive without such
hardware extensions are too slow. Are onthis days any controlers and
drivers for the good old QNX 2?
Not sure off the top of my head. Perhaps someone in the community
can think of a controller.
E.
THX
Georg
There are a number of potential problems. The first one to
hit is that the floppy will stop working. This can make it
difficult to even load QNX. By turning off your memory
caches this can sometimes be accomplished. I’ve gotten
QNX 2 to work on a 330Mhz Laptop this way. I suspect
faster processors might work.
Hopefully you are not using the QNX network. You get into
problems above 100Mhz if you create and destroy VC’s.
There used to be some documentation on this problem,
and a possible way to deal with it.
If you are desperate for disk performance, hook up an
external RAID to an AHA1540 card. I don’t know of any
way to get better performance other than writing your
own driver for a PCI card.
Previously, Georg Pohl wrote in qdn.public.qnx2:
Hi,
we are using QNX 2.21 on a Pentium 133. For one year we need to us a
machine with much more of power. Are there any limitations? Can we us
Pentium 1000 or more or less?
Another question: on the old machine there is an ESDI drive with a smart
cache card (a controler with 4.5 MB hardware cache). IIRC there was also
such for SCSI drives. We noticed that a pure SCSI drive without such
hardware extensions are too slow. Are onthis days any controlers and
drivers for the good old QNX 2?
THX
Georg
–
Mitchell Schoenbrun --------- maschoen@pobox.com
We used to have PSI disk-caching cards running under QNX2, eventually they
became so difficult to configure them with the newer hardware that we gave
up and installed normal ATA drives. To our surprise the disk performance was
almost as good as with the PSI cards.
Maybe our app doesn’t rely too much on disk performance, but my advice would
be to stick to standard IDE drives, anything else becomes a configuration
nightmare.
Regards,
Gabriel
“Mitchell Schoenbrun” <maschoen@pobox.com> wrote in message
news:Voyager.020131155239.279B@schoenbrun.com…
There are a number of potential problems. The first one to
hit is that the floppy will stop working. This can make it
difficult to even load QNX. By turning off your memory
caches this can sometimes be accomplished. I’ve gotten
QNX 2 to work on a 330Mhz Laptop this way. I suspect
faster processors might work.
Hopefully you are not using the QNX network. You get into
problems above 100Mhz if you create and destroy VC’s.
There used to be some documentation on this problem,
and a possible way to deal with it.
If you are desperate for disk performance, hook up an
external RAID to an AHA1540 card. I don’t know of any
way to get better performance other than writing your
own driver for a PCI card.
Previously, Georg Pohl wrote in qdn.public.qnx2:
Hi,
we are using QNX 2.21 on a Pentium 133. For one year we need to us a
machine with much more of power. Are there any limitations? Can we us
Pentium 1000 or more or less?
Another question: on the old machine there is an ESDI drive with a smart
cache card (a controler with 4.5 MB hardware cache). IIRC there was also
such for SCSI drives. We noticed that a pure SCSI drive without such
hardware extensions are too slow. Are onthis days any controlers and
drivers for the good old QNX 2?
THX
Georg
\
Mitchell Schoenbrun --------- > maschoen@pobox.com