Is it possible, if yes, witch controller should I use (recommeded)
I didn’t find any such controller card in the “Supported hardware” list in
your web site.
Hi Rejean,
Check out:
They have a RAID solution that you could look into. Check with them
first though, regarding support for QNX6.
Erick.
Rejean Senecal <rsenecal@oerlikon.ca> wrote:
Is it possible, if yes, witch controller should I use (recommeded)
I didn’t find any such controller card in the “Supported hardware” list in
your web site.
“Hardware Support Account” <hw@qnx.com> wrote in message
news:9tmj8m$e8s$3@nntp.qnx.com…
Hi Rejean,
Check out:
http://partners.qnx.com/vendors/partner.qnx?company=Perceptive+Solutions,+In
c&product=PCI-2000A+SCSI+RAID+Controller
They have a RAID solution that you could look into. Check with them
first though, regarding support for QNX6.
I suspect the only real solution now is to use ‘external RAID’ variety.
Those are external units with hot-swappable drive bays and RAID controller
inside. They can be hooked up to any SCSI controller and whole RAID will
appear as single SCSI device. Whole thing is independent of host OS and
transparent to host drivers.
You probably want to use a SCSI controller with enough bandwidth in the host
though, to make RAID useful. Multiply number of drives by maximum sustained
data transfer rate of one drive, that’s what you need. With modern drives
and RAID5 (requires 3 drives at least) you’d need a Ultra-160 controller.
Get Adaptec, it has best driver under QNX6. You will probably need to use
async mode (of io-blk) and enable write-behind cache on controller (and get
UPS).
That will also pretty much saturate standard (33Mhz/32-bit) PCI bus, so if
you have lot of other stuff going (video stream going to SCSI, etc) you need
better bus (33/64 PCI). I am not sure but I suspect all devices on the bus
must be same grade, if you stick any ‘slow’ 33/32 device the bus gonna
revert to that mode.
- igor
Previously, Igor Kovalenko wrote in qdn.public.qnxrtp.installation:
You will probably need to use
async mode (of io-blk) and enable write-behind cache on controller (and get
UPS).
Was that a missprint? Async mode is lowest common denominator mode for SCSI.
It peaks out around 2.5Mbyte/sec. I think you meant “sync” mode.
Mitchell Schoenbrun --------- maschoen@pobox.com