12 May
2015
12 May
'15
5:33 a.m.
Johnny Billquist wrote:
On 2015-05-12 11:55, Holm Tiffe wrote:
The exerciser showed some correctable soft errors, wich is pretty much
normal I think. Reformating the drive should simply "freshen up" the data
tracks but erase should do the same in this regard.
Since the distks aren't containing anything interresting, it would be the
right time now to do a reformat.
I think the head assembly has an voice coil engine anyways, so servo tracks
are needed to do the positioning. It is clear that they aren't affected from
a reformat...
I've changed some Nippon Chemicon electrolytics from the PSU now. All
330?F 25V Caps are bad, an 1000?F 25V too, where other Caps from the same
company are still ok. I've changed the 330? Caps against some good Rubycons
470? 25V from which I have "masses".
The construktor of that H7874 Supply is an dump asshole, no one should ever
construct switching PSU's in a way that it makes it impossible to desolder
broken electrolytic Caps! One module with 2 x 330?F Caps is build this way!
I had to pull of that bad caps, ..brown residues from the electrolyte below
them on the pcb. Cleaned the PCB with alcohol and soldered the new caps from
above, briged them with an 1206 X7R each.
Will test the PSU now...
[..]
Machine is working now as expected. Currently it is "erasing" the Disk0..
53 Minutes...
Regards,
Holm
--
Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe,
Freiberger Stra?e 42, 09600 Obersch?na, USt-Id: DE253710583
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Ok, the disk passed the tests with ok.
Excellent.
I've tried to boot something from DIA0 DIA1
and DIA2..nosurchfile so the
disks seems to be empty.
Oh Well...
Now I think about a reformat of the drives, but
there is no such procedure.
There is an erase program that should rewrite eachs sector with several
patterns. I'll think that it will do the job.
Does an format programm exists "in the field" or is something like thisi
proprietary to DEC?
Why would you want to reformat the drives?
That said, I would expect such a utility to exist in the firmware of the
drive.
But normally, since these drives remap bad sectors automatically, you
should normally just go on using them, and everything is ok.
Johnny