RL02 weirdness

Aaron Jackson aaron at aaronsplace.co.uk
Sun Dec 17 13:46:32 CST 2017

> On 12/17/17 9:04 AM, Aaron Jackson via cctalk wrote:
>> I unloaded very quickly but I think the damage is done.
> I KNOW the damage is done.
> NEVER attempt to load a pack if you haven't inspected it AND the heads
> first.

The pack was cleaned with lint-free kimwipes and 99.9% isopropyl alcohol
not too long ago.

> Was this combination ever known to work?

The heads had loaded many times (with this pack) without crashing before
I connected the heads to the correct headers on the R/W module
(i.e. up->up and down->down).

> You now need to throw that pack out, and thoroughly inspect and clean the heads
> and any pack to attempt to use in the future.
> You also need to inspect the filter, purge the air filtration system if you haven't done that already
> along with cleaning the filtered air path in the drive
> and run the spindle for a while before attempting to load the heads again.

I will check these things, thanks. The absolute filter is basically
brand new by the looks of it.

>> Why would the heads be installed this way? and why did it destroy my
>> platter when they are connected "correctly"?
> The only thing that comes to mind is the servo system is going to be extremely
> confused with the embedded servo information coming in the reverse direction.

It seems to me though that the servo information was wrong
before. Please see these:


This was from TP2 on the R/W module. S2 is wrong, which is why I noticed
that up was connected to down and down to up.


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