Media test issue
#3
Following your instructions I completed a test of 2 DSDD 5.25" disks, one from a generic manufacturer and one a "NOS" 3M disk.  Both tests generated an error on the first pass (at track 20 for generic, track 30 for 3M), which I ignored, but each passed without errors on a subsequent test.  I have uploaded test results with screen shots to data@cbmstuff.com.  The flux display for both disk images is, to my untrained eye, quite presentable.  I cannot account for the anomalous test results, but suspect they may be due to 30-year-old components.

However, in the process of testing I did discover that (at least some of) my previous attempts to test media were flawed for the following reason:  I have been using IBM360K, indexed, preservation as my settings on the SCP, and these settings are retained between sessions.  I have track 0 head 0 as my starting point and track 39 head 1 as the end.  This setting also persists from session to session.  However, each time I select Disk Drive Utilities that screen's track slider defaults to track 79 head 1 as the end point.  The settings from the disk copy screen don't carry over and the settings on the Utilities screen don't persist from session to session.  After selecting the correct parameters I sailed past tracks 0 and 1 where the errors were previously occurring.

The track 79 default does not seem to affect the "maximum track" test; the head extends as far as it can and no farther.  However, I can understand that the media test would assume different track parameters if the disk being tested is HD rather than DD.  

In any case, the more I learn about the SCP the more impressed I am with its abilities.  Thank you again for your assistance.
clh333
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Messages In This Thread
Media test issue - by clh333 - 09-24-2015, 05:45 AM
RE: Media test issue - by admin - 09-24-2015, 07:29 AM
RE: Media test issue - by clh333 - 09-25-2015, 06:37 AM
RE: Media test issue - by admin - 09-25-2015, 08:20 AM
RE: Media test issue - by clh333 - 09-26-2015, 06:07 AM
RE: Media test issue - by admin - 09-26-2015, 09:02 AM
RE: Media test issue - by SomeGuy - 09-26-2015, 11:34 AM
RE: Media test issue - by admin - 09-26-2015, 04:19 PM
RE: Media test issue - by clh333 - 10-22-2015, 10:36 AM
RE: Media test issue - by admin - 10-23-2015, 08:48 AM
RE: Media test issue - by clh333 - 01-28-2016, 07:08 AM
RE: Media test issue - by admin - 01-28-2016, 08:52 AM
RE: Media test issue - by clh333 - 01-28-2016, 09:40 AM
RE: Media test issue - by admin - 01-28-2016, 01:14 PM



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