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- Path: newshub.cts.com!usenet
- From: pwright@crash.cts.com (Phil Wright)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: VLAB Motion/MovieShop "Data Transfer Phase Error"?
- Date: 21 Mar 1996 07:30:07 GMT
- Organization: CTS Network Services
- Message-ID: <2932.6653T1409T829@crash.cts.com>
- References: <4479.6653T1012T1736@iig.com.au>
- NNTP-Posting-Host: gargoyle.cts.com
-
- On 20-Mar-96 11:58:37, Mark P Allen was reported to have said:
-
- >1) Does anyone know what aspect of the data transfer phase produces the
- >"Data Transfer Phase Error" of MovieShop's vmotion.library?
-
- Have you checked the jumpers on the WarpEngine to make sure it's supplying
- Terminatio Power to its SCSI bus? I seem to recall they come without the
- jumper installed.
-
- >3) Does anyone know the orientation of the SCSI terminating resistors on
- >the A3000T motherboard?
-
- My A3000 manual has a motherboard diagram and you can see on it where
- pin one is for each term pack socket. Perhaps the one for your tower will
- have one as well.
-
- Not that this has anything to do with your problem since you only have the
- CDROM drive on that bus. Proper termination is always good but I doubt
- it's a factor in your case. (As far as the native A3000T bus goes.)
-
- >Due to the problems mentioned above, I wanted to fit resistors to see if
- >it helped in any way (I have 3 spare 221/331 8-pin resistors, while the
- >schematics ask for 220/330 resistors. Should these work?).
-
- They should be fine.
-
- >I also have 3 x SCSI-2 (2 are FAST) HDs and a SCSI-2 Exabyte 4200c DSS-1
- >(DAT) streamer attached internally to the warpdrive device, configured
- >thus:
-
- I'd recommend putting every drive that isn't used for your VLAB video and
- audio files on the native controller and leave the WarpEngine SCSI bus for
- the performance critical stuff. Have you tried disconnecting the tape
- drive to see if there is a difference?
-
- >I would prefer the chain to flow linearly from ID#0 -> ID#4 (terminated),
-
- That really doesn't matter.
-
- >While I know the warpdrive.device will scan it's SCSI bus from ID#0 to
- >ID#6, I didn't think this arrangement would produce errors, as long as the
- >physical chain is correctly terminated.
-
- The arrangement of the SCSI ID'S in relation to their position on the bus
- is irrelevant.
-
- >Of course, the parallel existence of the A3000T's SCSI bus, with one
- >external, and no internal devices attached, and with no termination on
- >the motherboard throws confusion into the equation (as far I am concerned
- >anyway).
-
- Forget about it. Unless you are actually accessing the native SCSI bus at
- the same time as VLAB is using the WarpEngine SCSI bus, one is not going to
- affect the other.
-
- >Does this configuration offer any obvious explanation of problems being
- >experienced (occasional SCSI READ error with Exabyte 4200c,
-
- Sounds like a possible termination problem, as in no Term Power perhaps,
- or one of the drives in that chain isn't happy with one or more of the
- others. Take off all the drives but the one you need to playback your
- video and see what happens then. If that works fine, add back in the
- drives one at a time until you see a problem again.
-
- In regards to your Exabyte, have you tried www.exabyte.com?
-
- They have the SCSI id jumper settings and instructions for installing the
- term packs online.
-
- Phil
-
- pwright@crash.cts.com
-
-