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Playing ball for keeps with MPE

There's more of this all the time, so dust

Newswire Classic

By John Burke

As equipment gets older and as we neglect the maintenance habits we learned, we will see more messages like this.

Upon arrival this morning the console had locked up. I re-started the unit, but the SCSI drives do not seem to be powering up. The green lights flash on for a second after the power is applied, but that is it. The cooling fan does not turn either. I am able to boot, but get the following messages: LDEVS 5, 8, 4, 3, 2 are not available and FILE SYSTEM ERROR READING $STDIN (CIERR 1807).

When I try to log on as manager.sys, I must do so HIPRI, and get the following: Couldn’t open UDC directory file, COMMAND.PUB.SYS. (CIERR 1910) If I had to guess, I would say the SCSI drives are not working. Is there a quick fix, or are all the files lost? I should add that I just inherited this system. It has been neglected, but running, for close to two years. Is it time to pull the plug?

Tom Emerson responded

This sounds very familiar. I’d say the power supply on the drive cabinet is either going or gone [does the fan ‘not spin’ due to being gunked up with dust and grease, or just ‘no power’?] I’m thinking that the power supply is detecting a problem and shutting down moments after powering up [hence why you see a ‘momentary flicker’].

Tim Atwood added

"I concur. The power supply on the drive cabinet has probably gone bad. If this is an HP6000 series SCSI disc enclosure for two and four GB SCSI drives, move very quickly. Third-party hardware suppliers are having trouble getting these power supplies. I know the 4GB drives are near impossible to find. So, if it is an HP6000 series you may want to stock up on power supplies if you find them. Or take this opportunity to convert to another drive type that is supported.”

The person posting the original question replied, “Your post gave me the courage to open the box and the design is pretty straight forward. It appears to be the power supply. As I recall now, the cooling fan that is built into the supply was making noise last week. I will shop around for a replacement. I can’t believe the amount of dust inside!”

Which prompted Denys Beauchemin to respond

The dust inside the power supply probably contributed to its early demise. It is a good idea to get a couple of cans of compressed air and clean out the fans and power supplies every once in a while. That goes for PCs, desktops, servers, and other electronic equipment. The electrical current is a magnet for dust bunnies and other such putrid creatures.

Wayne Boyer of Cal-Logic had this to say; useful because supplies may be hard to locate

Fixing these power supplies should run around $75 to $100. Any modular power supply like these is relatively easy to service. I never understand reports of common and fairly recent equipment being in short supply. It is good advice to stock up on spares for older equipment. Just because it’s available somewhere and not too expensive doesn’t mean that you can afford to be down while fussing around with getting a spare shipped in.

The compressed air cans work, but to really do a good job on blowing out computer equipment, you need to use an air compressor and strip the covers off of the equipment. We run our air compressor at 100 PSI. Note that you want to do this blasting outside! Otherwise you will get the dust all over whereever you are working. This is especially important with printers, as you get paper dust, excess toner, etc. building up inside the equipment. I try and give our office equipment a blow out once a year or so. Good to do that if a system is powered down for some other reason.

Bob J. of Ideal Computer Services added

The truth sucks. There are support companies that don’t stock spare parts. The convenient excuse when a part is needed is to claim that ‘parts are tough to get.’ Next they start looking for a source for that part. One of my former employers always pulled that crap.

Unfortunately, quality companies get grouped with the bad apples. I always suggest system managers ask to visit the support supplier's local parts warehouse. The parts in their warehouse should resemble the units on support. No reason to assume the OEM has the most complete local stock either. Remember HP's snow job suggesting that 9x7 parts would become scarce and expensive? Different motive, but still nonsense.