On 12/11/15 9:33 PM, Josh Dersch wrote:
On 12/11/15 5:50 PM, Jacob Ritorto wrote:
Exciting stuff for a Friday night, right? Here's a visual aid in case
you're needing further inspiration:
https://www.instagram.com/p/_K-zHhHvLn78Qu5ijWqMf-HBem1LKMLaEdI1c0/ The
M2333K is the smaller one on the left with the green and yellow
lights on.
I'm booting from rl0, which contains the tuhs 2.9.1 rl02 image I
wrote with
vtserver earlier.
I want to use my nice, roomy smd disk so I can pull in all the
sources and
recompile stuff and I've managed to get this *so* close to working
but I'm
getting
xp0a: hard error bn xxxx cs2=1100 <MXF, IR> er1=0
on every single block when I try to mkfs /dev/xp0a 4800
This disk was working fine years ago via MSCP attached to the 11/73
(before
I lost the Micro/11 power supply).
Anyway, I referred to
http://bitsavers.trailing-edge.com/pdf/emulex/SC2151001-CC_SC21tech_Jan87.pdf
to set the emulation on the Emulex card for two rm03s and they're
showing
up in xxdp's zrmlb1 formatter, though they won't format there,
screensful
of errors.
I think I set the m2333k to 32 sectors, per this manual:
http://manx.classiccmp.org/collections/antonio/chrisq/B03P-4760-0101A_-_M2331,M2333_Micro-Disk_Drives_OEM_Manual.pdf
Because XXDP is reputed to be really strict, I figured that was
normal and
then tried the Emulex on-board formatting procedure against both xp0 and
xp4 and they formatted perfectly without error. Guess the Emulex
on-board
stuff doesn't bother verifying much?
So I think that maybe I've misunderstood the hard sectoring / sector
sizing
thing. Does anyone remember the gist of it and would you be able to
describe? Do you see any other mistakes?
thx
jake
I'm not an expert with SMD drives and I've never used your particular
controller (I have a slightly newer Emulex in my 11/44) but here's a
couple of things I noted while leafing through the SC21 manual you
linked:
1.) The SC21's format does *no* verification at all. It lays down an
initial format and that's it. It doesn't create the bad-block list
(more on that later).
2.) Section 6 of the manual lists a set of modifications (patches)
that need to be made to XXDP diagnostics in order for them to work
properly with the SC21. This includes the ZRMAC0 formatter form
RM02/RM03. You'll likely need to apply them; hopefully you can find
the required versions to hack...
3.) In addition to setting the sector size/sector count on the
Fujitsu, did you also configure the SC21 for the appropriate drive?
(see Appendix A) I don't see an M2333 listed there specifically, but
there might be something with a similar (or identical) geometry you
can use instead.
Regarding the bad-block list: You are going to need this to be
generated properly, and the only way to do that is to run the
appropriate XXDP formatter and exercisers. If you have the bad block
list for the drive, hopefully one of the diags will let you enter it,
otherwise I suggest running *many* passes of the exercisers until they
stop finding bad blocks.
After you have that step done, you will need to have a 2.9.1BSD kernel
that's been compiled with bad block support, otherwise BSD will simply
ignore bad sectors and assume the whole disk is good -- which will
cause bad things to happen as soon as something is written over a bad
sector.
(Apologies if any of the above is already old-hat; just trying to
cover all the bases I know of...)
- Josh
I'll also add that in order to create a filesystem on the new disk using
mkfs, you'll need to have run the 2.9BSD 'disklabel' program on it to
create the disk label (partition map). You can do this via vtserver,
it's covered in the manual. Obviously this can only happen after you've
managed to format/exercise the disk :).
- Josh
