> I now suspect the PC's hardware to produce intermittent memory and/or
> harddisk faults; they seem temperature related (most other crashes and
> failures occurred in the summer). Various memory test programs revealed
> nothing so far. Maybe I need a brand new one.....
> More backups and checks then, I hate to lose another day on this sort of
> crap....
Also, don't overlook bad utility power and/or a bad PC power supply (noisy,
out of regulation, etc.). During summer months, utility power can be
rather awful. And of course, use a good quality UPS.
If you replace the PC power supply, it is worth getting a good one. Active
Power Factor Correction (PFC) and adaptive fan speed are features worth
having. The PFC will present your UPS or generator with an easier load.
Adaptive fan speed will cut down on the noise and dust accumulation by
running the fan only as fast as necessary to cool the power supply.
Yoda tells me: "The dark side of summer hurricanes are. Prepare for
Florida hurricane season you must. The ways of UPS and generators, know
them well you do." :-)
Best regards,
Ivan Baggett
Bagotronix Inc.
website: www.bagotronix.com
Leo Potjewijd wrote:
At 01/06/05 19:20, Brad Velander wrote:
Leo,
my libraries are typically much larger (10 - 40MB) than the
size mentioned in your reported size. I have never seen a problem.
I don't think that the reported size is correct. Do you have
the libraries stored in a DDB file? Have you compressed that DDB
library file recently? DDB files can get quite large when they are not
compressed regularly.
Well folks,
it took quite a bit of bit-digging but I finally found the cause for
Protels' sudden interest in it's navel (didn't know it even had one,
until yesterday afternoon :): for reasons as yet unknown the offending
library was corrupted, big time.
It started out fine but after twelve or so components the information
was complete rubbish. Luckily I have the same setup with a 10-generation
auto-backup every 10 minutes on three PC's, so I only needed to add one
component to be back in business.
Brad: as a result of many earlier system crashes (on totally different
PCs) I use the Windows file system for storage exclusively. Pro: no
compression needed (ever) and all files are visible/manipulatable
outside Protel. Con: directories look a bit cluttered.
Note: our software developers had also noticed several qugs (quirky,
bug-like events) in MS Access..
For those interested, while digging I found the really, really hard
limits concerning PCB libraries:
1) a library can be a maximum of 4,294,967,295 (2^32-1) bytes long
2) component names have a maximum length of 255 characters
3) a component can be comprised of 65535 elements maximum
4) each element is stored as an ASCII 'record' of maximum 65535
characters long
Point 4 surprised me, too. After all, it is supposed to be a binary.......
Point 1 (and 4) effectively limits the maximum number of components
because the file is sequential and internally uses 32-bit unsigned
numbers for navigation. However, for all practical uses this is equal to
no limit at all.
I now suspect the PC's hardware to produce intermittent memory and/or
harddisk faults; they seem temperature related (most other crashes and
failures occurred in the summer). Various memory test programs revealed
nothing so far. Maybe I need a brand new one.....
More backups and checks then, I hate to lose another day on this sort of
crap....
Thanks,
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