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View Full Version : Rodime Ro202E error code 0001 -Repair methode



MauriceH
January 31st, 2015, 04:59 AM
I received a system IBM 5160 with a Rodime Ro202E 21MB Harddrive that had
a failure at power-up.
The LED on the harddrive falshes Short,Short,Short, Long.
That is fault code 0001 (1) No Index Track Data Burst.

It was attached to a WD1002A-WX1 Harddisk controler.
At Debug G=C800:5 it mentioned "WX2 Revision 6.0"
BOIS is hand written labeld 18/20/30?? as far as I can read it.
ALso Jumper 4 is IN (rest all OUT)
That should be a setting for
640 Cyl
4 Heads
32 sec/track
639 landingzone
256 bytes/sec
As is the Rodime Ro200E was fitted originaly to that card with that setting.

Because of the trun-off state Hardisk by this fault 1" the system does not recall any harddrive.
So furter more testing or low-level format program's is useless.

Knowing of bad capacitors by aging I replaced them, No Luck.

Finding the manual USM0023-B_200SeriesDiskDrivesUsermanual.pdf (http://chiclassiccomp.org/docs/content/computing/Rodime/USM0023-B_200SeriesDiskDrivesUserManual.pdf) at chiclassiccomp.org/
A usefull manual but not quit the same board layout as I have but..

Finding a notifiaction for Link A that is normaly IN. (Link B is OUT by factory).
That link A IN the steprate is 10us to 3.1 ms
That LINK A OUT the stape rate is 3.1ms to 8.0 ms.

So I took out LINK A.
Power-up and the Ready LED of the HD turns ON - So far so good.
The system Boot with system Flop.
The system now reconice the HD again and a ChDir to C> is possible again.
But a DIR is a Seek error.

Did a Debug G=C800:5 -> Complete
Did a Fdisk Put DOS Partition on it.
Did a Format c: /s
And there the drive Boots again!

Put back in LINK A to get the fast step rate again.

And the drive keeps running and Booting again.

So If you have a suspect faulure 1 (0001) of this type of Rodime series 200 Harddisk try the above procedure
By removing LINK A and Low-level format the drive.

Regards,
Maurice Hamm

woodchips
January 31st, 2015, 06:25 AM
They are tough old drives, the Rodime RO200.

I used to be given ones that had had a head crash and whip the top of, undo the screws holding the platters in, undo the cap screws holding the heads and lift the whole lot, carefully, out. Then discard the dead platter, and it was always only one, brush all the debris out and put it all back together. Drives used to run for years, until I binned them in fact. Might only have one platter but still a cheap drive! The WD controller would do a ow level format so the alignment when put back together wasn't important.