[Coco] drive issues

[Steve Ostrom]

Josh, I agree with Bob.  This has happened to me many times as I archive all 
my disks.  You can avoid this by trying the following procedure:

1) Examine the disk prior to inserting in the drive.  If you see the media 
is clean, continue to step 2.  If the media shows scales, it is bad and will 
dirty your drive heads with the oxidized media surface, making cleaning the 
heads difficult.
2) Insert the disk into a powered disk drive that is not critical to your 
copying, and close the lever.  No need to type anything.  The drive will 
spin the disk a few revolutions.  If your hear a scratching noise when the 
disk drive is closed on the disk, it may be too deteriorated to make a good 
copy.
3) If it passes the above tests, it should be able to be read in your good 
copying drive without dirtying the heads.
4) If the disk looks good, but you hear the scratching noise in the test 
drive, and the disk is critical to be copied, it may copy OK, but you might 
need to clean the drive heads after.

I think that step 1 is the most critical.  If you don't have a spare 
non-critical drive, save all the "scaled" disks for the end of your 
archiving, and copy all the clean disks first.

--- Steve ---


-----Original Message----- 
From: Bob Devries
Sent: Monday, July 13, 2015 9:48 PM
To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] drive issues

Actually, it is my experience that there is oxide residue on the drive
heads. I also have a dual TEAC drive set and frequently when trying to
read old almost worn out disks, the oxide comes off the disk and
accumulates on the drive heads.
Isopropyl alcohol and a Q-tip will remove the residue.

Regards, Bob Devries
Dalby, QLD, Australia

On 14/07/2015 12:38 PM, Bill Nobel wrote:
> Based on the fact you mention squealing, I would think the bearing/bushing 
> is done.  I have kept drives going with a bit of teflon oil, but they will 
> fail.
>
> Bill Nobel
>
>> On Jul 13, 2015, at 8:34 PM, Josh Harper via Coco <coco at maltedmedia.com> 
>> wrote:
>>
>> hi guys
>> I have a dual teac drive system
>> my issue is
>> first  I was copying disk  from real drive 0 to sd with no problems 
>> copied like 20 disk no issues then I went to copy a few  more disk when I 
>> put the diosk in  there was weird noises and sqilling
>> now drive is having issues readingalso when  I do a dskini0 it will do 
>> first pass but wont do a second pass
>> I tried a disk cleaning disk but that didn't work
>> can a dirty head cause this or is the drive going bad
>> oh and I tried 2 different disk when I did the dskini0
>> thanks
>>
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>
>

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