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Apparent success!
Our venerable first MTU system now seems to be working wonderfully after replacing the SCSI controller AND modifying a couple of its defaults. By stepping down the transfer rates to about half the maximum value and turning off all caching options related to the SCSI card, we no longer see any lockups during any operations that we have tried. (This machine used to lockup during simple playback, recording, segment normalization, EFX, combining groups...&c. &c.) To any others who might be experiencing these problems while using new SCSI drives or controllers, I highly recommend taking the same steps if your motherboard is of an older generation.
Bryan was terrific in helping me track this down in spite of it not being MTU's fault. (I didn't realize until some time had passed that certain modifications had been made to the machine without my or MTU's knowledge.) I'm sorry for wasting any of your time, MTU folks, but we're cookin' once again.
Thanks!
Chas.
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Charles Lawson
WETA Radio & Television
Washington, DC
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