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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: 25 Mar 1996 19:55:41 GMT
- Organization: CTS Network Services
- Message-ID: <2092.6658T679T2756@crash.cts.com>
- References: <4479.6653T1012T1736@iig.com.au> <2932.6653T1409T829@crash.cts.com> <4838.6655T634T58@iig.com.au>
- NNTP-Posting-Host: gargoyle.cts.com
- X-Newsreader: THOR 2.22 (Amiga;TCP/IP)
-
- On 22-Mar-96 09:47:57, Mark P Allen was reported to have said:
- >On 21-Mar-96 17:30:07, Phil Wright wrote:
-
- PW>> I'd recommend putting every drive that isn't used for your VLAB video
- PW>> and audio files on the native controller and leave the WarpEngine
- PW>> SCSI bus for the performance critical stuff. Have you tried
- PW>> disconnecting the tape drive to see if there is a difference?
-
- >I tried to correct the A3000T SCSI termination by placing the Quantum
- >LPS525S system drive (terminated) on it's internal bus (ie.,
- >ext/CDROM/term -> motherboard/noterm -> int/LPS525/term). Immediate and
- >frequent lockups resulted. Frustrating to say the least. Needless to say I
- >immediately returned the LPS525 to the WARP Engine.
-
- Is it possible that you have Synchronous transfers enabled in the A3000T
- BattMem bits and the Quantum LPS525S can't really handle it?
-
- I've got a Quantum Maverick 540S on my A3000 internal buss and it really
- was unhappy when I enabled the Synchronous transfers of the A3000 SCSI.
-
- PW>> Forget about it. Unless you are actually accessing the native SCSI
- PW>> bus at the same time as VLAB is using the WarpEngine SCSI bus, one is
- PW>> not going to affect the other.
-
- >And why I tend to suspect problems may get worse rather than better if I
- >try to mix the devices and increase the general transaction levels between
- >the two SCSI busses. Will experiment further though.
-
- This shouldn't happen if you move your DAT, CDROM and system drives to the
- A3000T SCSI bus as VLAB won't (shouldn't) be accessing any of them during
- playback.
-
- >Thanks very much for your input.
-
- No problem. Good luck!
-
- >BTW, while it doesn't affect the SCSI READ error on the Exabyte as far as
- >I know, changing the video and audio partitions to separate drives seems
- >to have markedly improved MovieShop's "data tansfer phase error".
-
- Putting video and audio on seperate _drives_, not partitions, is pretty
- much mandatory for NLE systems. Otherwise the drive is constantly seeking
- as it bounces from file to file for the different types of data.
-
- Regards,
-
- Phil
-
- pwright@crash.cts.com
-
-