27 Mar
2018
27 Mar
'18
2:34 a.m.
On 03/26/2018 04:08 PM, Aaron Jackson via cctalk
wrote:
No worries, your input has been valuable, so thank you.
For anyone else who might have an idea: ON fault the heads are retracted and will
not load till cleared.
Least mine behaves that way.
Most common problems are wrong drive address, cable issues, no terminator.
Others include head lock not removed or the auto unlock style of
headlock has
the tab broken.
Thanks for the suggestions, Allison.
Given that the pack was tested before it was shipped, I am beginning to
come to the conclusion that the heads are bad. I can see the servo burst
data if I push the heads on a few mm further into pack, but perhaps the
heads produce noise which confuse the logic upon load.
Heads are more expensive than what I'd like, from what I have seen on
eBay.
I believe I have a "working" (i.e. non-crashing) down head (as in the
one on top). If this is head 0 (anyone know?) then I might have a chance
of getting it working without spending anymore money. Let's see.
Thanks again,
Aaron.
So, from what I can see, the drive should spin up
correctly, but for
some reason it goes into fault mode. I am right in thinking that upon
load, the heads should continue moving forward until the first track is
found, right? I should not have to perform a seek manually from the PDP?
If this is not the case, perhaps there is something else wrong.
I?m not an RL02
hardware expert at all, just a daily user back in the
day. I?m reading this assuming that at all times the drive is
correctly hooked up to an RLV12 in a running PDP with the correct
cable and termination present on the drive? If it isn?t you?ll get a
fault condition instead of ready after spin up.
A It seems to be hooked up correctly. When it is in
the weird flashing
ready state, the boot loader says "Read error" or "Device error"
randomly. The heads oscillate back and forth very slightly as if it is
trying to align itself better on the first track, which doesn't exist
because it hasn't moved far enough into the pack.
IF in fault its resetting to
retracted on every try.
If not something else is wrong.
I'm beginning to think the heads are bad
which will be far too expensive
so I may end up giving up.
Heads are not that expensive... However you could have a wrong pack
or one that has been erased and has no servo tracks. You must start with
a known good pack and cleaned heads.
Allison