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- Newsgroups: comp.sys.mac.hardware
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!usenet.ucs.indiana.edu!bronze!jkain
- From: jkain@bronze.ucs.indiana.edu (Jeff Kain)
- Subject: Unsolvable problem
- Message-ID: <1992Jul25.195522.5726@bronze.ucs.indiana.edu>
- Summary: We can't solve a baffling network problem
- Keywords: help problem Mac Hardware network printing File Sharing
- Organization: Indiana University
- Date: Sat, 25 Jul 92 19:55:22 GMT
- Lines: 88
-
- Hello...
-
- I'd like to share a problem we are unable to explain. It has baffled
- us, and we are out of ideas on how to fix it. Any ideas you have would
- be greatly appreciated!
-
- DIARY:
-
- June 20, 1992
- -------------
- Pediatrician's office with Macintosh network. Two Mac IIcx computers
- and one Mac SE running System 6.0.8, all with 2MB RAM, all sharing an
- AppleTalk ImageWriter printer. One IIcx is the 'file server' and a
- workstation for a database program, connected via TOPS. No problems,
- everything is working fine.
-
- June 21, 1992
- -------------
- We, the experts, walk into the office to do several things:
- 1. Upgrade each IIcx to 5MB RAM and the SE to 4 MB
- 2. Remove TOPS on all Macs and install System 7.0.1 on the CXs
- (6.0.8 still on the SE)
- 3. Upgrade the medical database program to the latest version
-
- We opened each machine, vacuumed the insides, installed the memory on
- each machine, then removed TOPS and installed System 7 and the new
- program. Did a quick check to make sure the memory was working, loaded
- the new program and did quick tests, and left.
-
- June 22, 1992
- -------------
- The office calls with many problems.
- 1. The AppleTalk Imagewriter, which used to print very fast (always
- in draft mode) is now taking two to four minutes to print a single
- page from the CXs only. The SE prints fine.
- 2. The database program on the non-server IIcx, which opens by
- loading a set of data dictionaries into RAM across the network, is now doing so
- approximately five times slower than before, and five times slower
- than the SE which is also doing the same network loading.
- 3. The connection to the printer is periodically lost from the
- non-server CX.
-
- Here's what we tried to solve these problems, over the last month:
-
- 1. Replace all phoneNet connectors. Didn't help.
- 2. Tried booting the CX from a 6.0.8 floppy and running database.
- Didn't help. Net still slow.
- 3. Exchanged the CX and the SE CPUs only, using the identical network
- cabling, power cords, keyboard, mouse, etc.. The SE ran normally. Put
- the CX in its place, the CX went back to the same problems.
- 4. Brought the CX to our office and tested on our network. No
- problems, performed flawlessly. Brought to Apple Authorized Service,
- where they did several hours of diagnostics. No problems found, that
- will be $70 please...
- 5. Directly connected the SE to the file server (sat them side-by-side
- and used a new piece of phone wire to connect them, bypassing the
- existing wiring in the ceiling). SE ran fast. Put the CX in its
- place, still slow.
- 6. Copied the database program from the SE to the CX and replaced
- existing copy. Didn't help.
-
- The office is furious and frustrated. We are out of ideas! Our next
- step is to rewire the whole office and reformat each hard disk, but we
- don't think that these are the problems.
-
- Some long-shots we considered:
- - All the CPUs are sharing the same Kensington UPS. The overload light
- does not light on the UPS, and doesn't otherwise indicate there is too
- much load or that it is not supplying enough power to all machines.
-
- - Maybe we have two separate problems... a defective printer and
- something else causing the CX to load data slowly.
-
- - Something (an X-ray machine, lab equipment, ...) is causing just the
- one CX to have problems.
-
- Any ideas? Any comments will be gratefully accepted! Please e-mail
- to jkain@bronze.ucs.indiana.edu or WabashMed@aol.com
-
- Thanks!
- Jeff Kain
-
-
-
- --
- jkain@bronze.ucs.indiana.edu
- F7 d+ m++ b- r-- s++ e- h c
-
-