30 Mar
2015
30 Mar
'15
2:28 a.m.
On 2015-03-30 07:47, Christopher Parish wrote:
I've gotten my RL-02 -> USB Mass Storage
controller mostly working with a few residual gremlins. Specifically, I've noticed
from my testing that I have good packs, ones that read out almost the same every time, and
bad packs, ones where half the bits seem to be in different states every time I read them.
I've left write support untested until I can solve this problem.
Right now, my working theory is that different controllers had slightly different timing
characteristics, and I may need to adjust more of my DPLL parameters dynamically to deal
with that (something I'd rather avoid). Of course, most of these packs haven't
been put into a drive since the mid-80s, and there could be some bit rot going on.
As many of you have much more experience dealing with these drives than I do, my
questions are:
- What type of long term reliability have people noticed from their RL02K packs?
I have not had any problems with long term reliability. I have packs
that are 20 years old that read just fine.
- Is garbage data sometimes normal for certain packs
until they are rewritten with ?fresh? data?
No.
- Has anyone noticed pack compatibility problems
between various computers/RL-02 controllers?
No.
I suspect you have some issues with your controller, and I wouldn't
think it was timing, but I really don't know enough at this point to
make any smart comments.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol