[M]:Problems with ethernet and 7200/90.

Bill Ryan (bryan@wpine.com)
Mon, 27 Nov 1995 14:22:38 -0800


>>Forwarded message:
>>> Date: Tue, 21 Nov 1995 13:00:45 -0500 (EST)
>>> Subject: problems with ethernet and 7200/90
>>>
>>> Mime-Version: 1.0
>>> Content-Type: TEXT/PLAIN; charset=US-ASCII
>>>
>>>
>>> Apple Confirms Problems with 7200/90 Ethernet
>>> ---------------------------------------------
>>> by Geoff Duncan <geoff@tidbits.com>
>>>
>>> Mixed in with the flurry of issues surrounding Apple's new PCI
>>> Power Macs - including difficulties with Open Transport and
>>> numerous printing problems - there have been reports of slow
>>> Ethernet performance and outright crashes on the Power Mac
>>> 7200/90. Apple last week confirmed the problem exists and
>>> announced plans to fix the problem. _Only_ the Power Macintosh
>>> 7200/90 model is affected by this problem; neither the 7200/75
>>> nor any other Macintosh model are impacted.
>>>
>>>
>>> **What's the Problem?** The built-in Ethernet on the Power
>>> Macintosh 7200/90 may fail to correctly send large packets over an
>>> Ethernet network regardless of the network protocol being used.
>>> This can cause connections to time out, give poor performance, or
>>> in some cases lock up the machine.
>>>
>>> The trouble stems from the design of the built-in Ethernet on the
>>> 7200/90, which is timed from a clock generator ASIC; other
>>> Macintosh systems clock built-in Ethernet off a dedicated clock
>>> chip. Apple has reworked the logic board of the 7200/90 to include
>>> a dedicated clock chip, and all units currently in manufacturing
>>> incorporate this change. This problem does not impact the
>>> 7200/90's printer or modem ports, and (obviously) does not cause
>>> trouble if the built-in Ethernet on the machine isn't in use.
>>>
>>> Apple has posted detailed information about the problem on
>>> commercial online services and in its Tech Info Library. I had
>>> trouble locating the article in the Tech Info Library, but Ric
>>> Ford has made the text of Apple's release available on his
>>> MacInTouch Web site.
>>>
>>> http://til.info.apple.com/til/til.html
>>> http://www.macintouch.com/~ricford/7200problems.html
>>>
>>>
>>> **Which 7200/90s are Affected?** Power Macintosh 7200/90s with
>>> serial numbers before xx543xxxxxxx may exhibit the problem. Serial
>>> numbers greater than xx544xxxxxxx incorporate the reworked logic
>>> board and don't have the problem.
>>>
>>> However, just having a 7200/90 with a serial number in the right
>>> range doesn't mean every network trouble is attributable to this
>>> timing problem - plenty of other things can cause slow network
>>> transfers and (yes) crashes. If you're having trouble, Apple
>>> recommends troubleshooting your Ethernet connection to see if the
>>> problem might be network-related. It's also probably a good idea
>>> to install the latest version of Open Transport (currently 1.0.8)
>>> and the 7.5.2 Printing Fix 1.1 (if you print) to see if those help
>>> your performance. (See the previous article about the 7.5.2
>>> Printing Fix for more information.)
>>>
>>> **If You're Affected...** Apple has announced it will replace
>>> motherboards on 7200/90 systems at _no_cost_ so long as the unit's
>>> serial number is in the specified range; contact your Apple dealer
>>> or call Apple at 800/SOS-APPL. Apple claims customer complaints on
>>> this issue have been limited to a few calls from large
>>> corporations. Though reports on online services and Usenet have
>>> been more extensive, it's difficult to tell whether some of the
>>> problems reported are due to this hardware issue or unrelated
>>> network problems. The bottom line seems to be that if you own a
>>> 7200/90 in the serial number range and rely on its built-in
>>> Ethernet, it's probably worth investigating Apple's logic board
>>> replacement.
>>>
>>> -------------------------------------
>>
>>and the apple press release via http for the profs imparied:
>>
>>
>>STATEMENT AND Q&A
>>11/17/95
>>v 3.0
>>Power Mac 7200/90 Ethernet Statement and Q&A
>>
>>Apple has determined that under certain network conditions, independent
>>of the network protocol being utilized, the Power Mac 7200/90 may fail to
>>successfully send large packets over it's built-in Ethernet. The trouble
>>mode is that the 7200/90 may lock-up, timeout, or cause extremely slow
>>ethernet performance under certain conditions. These conditions generally
>>occur when transferring large packets of data over large and busy
>>networks.
>>
>>Two examples of such transactions that may send large packets are
>>transferring a file to a Unix host, or sending messages from a Notes
>>client to a Lotus Notes server. Otherwise, Ethernet functions perform
>>normally. Current customers phone calls of this issue have been limited
>>to a few of our largest business customers only, and we have implemented
>>corrective action plans in all of these instances.
>>
>>The problem has been isolated to the 7200/90 system's logic board and is
>>limited only to 7200/90 customers, and we believe that all 7200/90
>>systems currently available should not be affected by this issue. No
>>other Power Macintosh, Power Macintosh LC, Performa or PowerBook models
>>experience this problem including the 7200/75.
>>
>>We do not expect the problem to be widespread, though Apple is
>>proactively notifying customers of this issue and has instituted trouble
>>shooting procedures to make it easy to determine if a customer's system
>>is impacted, and if so, receive a replacement logic board at no charge.
>>This information has been posted in the techinical information library
>>avaialbable on a number of online services, including eoWorld, AppleLink,
>>CompuServe and the Internet (see listing below for addresses/pathways).
>>Customers without access to an online service or the Internet, may
>>contact Apple at 1-800-SOS-APPLE.
>>
>>All of the manufacturing sites have already implemented a logic board
>>change and we believe that all 7200/90 systems currently available should
>>not be affected. That means any customer with a 7200/90 that has a system
>>with a serial number of "XX544XXXXXXX" or higher should not be affected.
>>
>>If a customer has completed the troubleshooting procedures and still
>>finds that their 7200/90 experiences extremely slow performance when
>>transferring large files then they should contact their local Apple
>>Authorized service provider or call Apple (at 1-800-SOS-APPLE in the US)
>>to be advised on how to have the logic board replaced.
>>
>>********
>>Trouble Shooting Procedures:
>>If you are experiencing problems when sending large packets over the
>>built-in Ethernet port of your Power Macintosh 7200/90 then we recommend
>>that you try the following troubleshooting procedures:
>>
>>1) Determine whether or not your Power Macintosh 7200/90 serial number
>>falls below the range of affected 7200/90 systems. (Located on the
>>back of the system)
>>
>>2) Verify that you have a valid Ethernet network connection or try moving
>>the 7200/90 to a different location on the network to see if the
>>problem persists.
>>
>>4) Verify whether or not the problem occurs on a different PCI based
>>Power Macintosh (e.g. 7200/75, 7500, 8500 or 9500). If the problem
>>occurs on a different PCI Macintosh then the problem may be software
>>or network related.
>>
>>5) Verify that you are running the latest version of Apple's new Open
>>Transport networking protocol. Currently it is at version 1.0.8.
>>
>>6) If you experience problems when printing over ethernet to a network
>>printer, verify that you have the "System 7.5.2 Printing Update"
>>installed.
>>
>>If your Power Macintosh 7200/90 ethernet problems continue after trying
>>the troubleshooting procedures listed above then contact contact your
>>local Apple Authorized service provider or call Apple (at 1-800-SOS-APPLE
>>in the US) to be advised on how to have the logic board replaced.
>>
>>
>>Q&A
>>
>>Q: There have been reports of a hardware issue with the 7200/90. Can you
>>describe it in greater detail? A: There have been reports of problems on
>>the 7200/90 when using the systems built-in Ethernet ports. Under certain
>>network conditions, depending on the protocol being utilized, the
>>7200/90 may fail to successfully send large packets over Ethernet.
>>
>>Depending on the application or operation being performed a customer
>>might experience one of the symptoms summarized below:
>>
>> o When using TCP/IP, IPX, or in some cases AppleTalk as the transport
>>protocol on an Ethernet network, the 7200/90 may lock-up or timeout under
>>certain conditions (e.g., transferring a file to a Unix host, sending or
>>composing messages from a Notes client to a Lotus Notes server or
>>transferring other large packets of data). o Transferring large files
>>across certain repeaters may cause the 7200/90 to hang or to exhibit
>>poor performance.
>>
>>Q. How long have you known about this?
>>A. The problem came to our attention in late October. At first our
>>Support team believed that the issue would manifest itself occasionally
>>when transferring to a Unix host. In November, it became apparent the
>>issue could happen more often. At that time Apple placed a product hold
>>on all work in process, and inventory. A logic board fix was set in
>>place, adding a dedicated clock chip to the Ethernet circuit and
>>production was restarted. All WIP and inventory has been or is being
>>reworked.
>>
>>Q. Have your received complaints from customers?
>>A. Yes. We have received a few calls from customers using the 7200/90
>>under certain networking conditions (symptoms that we have described).
>>Apple is working diligently to correct these problems as quickly as
>>possible and at no cost to the customer. Apple is dedicated to customer
>>satisfaction, and that is why we are now proactively seeking out other
>>7200/90 customers who might potentially experience the same issues in
>>order to correct it before it becomes a problem.
>>
>>Q: Does this affect all Power Mac 7200/90 customers?
>>A: NO. Not all Power Macintosh 7200/90 customers will experience this
>>problem. Only a fraction of these customers-those who are utilizing the
>>built-in Ethernet-are affected.
>>
>>Customers most likely to be affected by this are those:
>>o Connected to an Ethernet network and transferring files to a Unix
>>host or Lotus Notes Server or transferring other large packets of data.
>>o Transferring large files across certain repeaters may cause the 7200/90
>> to hang or may exhibit poor performance.
>>o That have a system with a serial number of "XX543XXXXXXX" or older (If
>> the unit has a serial number of "XX544XXXXXXX" has been reworked and
>>does not have the problem)
>>
>>Systems using the AppleTalk serial port will not be affected.
>>Systems using the modem port will not be affected.
>>
>>Q: Are the issues with the 7200/90 attributable to the new Open
>>Transport networking software?
>>A: No. Thesee issues havew been isolated to the differences in the
>>Ethernet clock chip described above. However, to insure the highest
>>compatibility with existing networking software, customers should be
>>running Open Transport v1.0.8.
>>
>>Q. What are the serial numbers of the systems affected?
>>A. Power Mac 7200/90 systems with a serial number of "XX543XXXXXXX" or
>>older (If the unit has a serial number of "XX544XXXXXXX" has been
>>reworked and does not have the problem)
>>
>>Q: Does it affect the Power Mac 7200/75?
>>A: No. This problem is specific only to the 7200/90 and no other systems.
>>
>>Q: Why does it affect only the 7200/90?
>>A: On Power Macintosh 7200/90 systems the Ethernet clock is fed from a
>>clock generator ASIC. Other systems including the 7200/75 generate the
>>clock from a dedicated clock chip. 7200/90 boards have been reworded to
>>add a dedicated clock chip.
>>
>>Q. When will you tell your customers?
>>A. Today we are in the process of posting the detailed diagnosis to the
>>various online services and the Internet (see listing below for
>>addresses/pathways). We expect this process to be completed by Monday,
>>November 20th.
>>
>>Q. How will you tell your customers?
>>A. We are notifying our customers in a number of ways. First, through
>>various online services and the Internet. Customers without access to an
>>online service or the Internet can contact Apple at 800-SOS-APPLE
>>(7:00am-7:00pm, Mountain Standard Time) and for a verbal diagnosis of the
>>problem. International customers should contact their local Apple
>>authorized service provider.
>>
>>Q: What is Apple doing to correct this problem?
>>A: All of the manufacturing sites have already implemented a logic board
>>change and customers purchasing the 7200/90 currently available should
>>not experience the above mentioned problems.
>>
>>Though, once it is determined that a 7200/90 customer is experiencing the
>>above mentioned problems as a result of a problem with the systems built
>>in Ethernet port, then Apple (or an Apple Authorized Service Provider)
>>will correct the problem at no cost to the customer.
>>
>>Q: How can customers check and see if it is affecting their systems?
>>A: If 7200/90 customers are experiencing the above described symptoms and
>>are connected to an Ethernet network, and have gone through suggested
>>troubleshooting tactics but are still experiencing problems, they should
>>contact 1 800 SOS APPLE or contact an Apple Authorized Service Provider
>>in their area in order to correct the problem.
>>
>>Q. If a customer determines that his or her system contains the described
>>problem, what should he or she do?
>>A. If a customer's computer has a serial number in the specified range,
>>Apple will replace their logic board at no cost.
>>
>>Q. Does the customer have to prove they have the problem?
>>A. Apple will replace logic boards with no questions asked.
>>
>>Q. How many units are impacted?
>>A. While it is difficult to give a precise estimate, we expect that the
>>majority of 7200/90 customers will NOT be affected.
>>
>>Q. Does this affect availability of the Power Mac 7200/90?
>>A. Since 7200/90 inventory is being reworked, a temporary window may
>>occur is some area's due to the time it takes new product to transfer
>>from the factories to the customers. We do not expect this to be a issue
>>for customers where an Apple manufacturing site is near, but may cause a
>>short delay in other locations. Overwise there is a very strong supply of
>>the 7200/90.
>>
>>Q: What are the troubleshooting procedures?
>>A: If you are experiencing problems when sending large packets over the
>>built-in ethernet port of your Power Macintosh 7200/90 then we recommend
>>that you try the following troubleshooting procedures:
>>
>>1) Determine whether or not your Power Macintosh 7200/90 serial number
>>falls below the range of affected 7200/90 systems.
>>
>>2) Verify that you have a valid ethernet network connection or try moving
>>the 7200/90 to a different location on the network to see if the
>>problem persists.
>>
>>4) Verify whether or not the problem occurs on a different PCI based
>>Power Macintosh (e.g. 7200/75, 7500, 8500 or 9500). If the problem
>>occurs on a different PCI Macintosh then the problem may be software
>>or network related.
>>
>>5) Verify that you are running the latest version of Apple's new Open
>>Transport networking protocol. Currently it is at version 1.0.8.
>>
>>6) If you experience problems when printing over ethernet to a network
>>printer, verify that you have the "System 7.5.2 Printing Update"
>>installed.
>>
>>If your Power Macintosh 7200/90 ethernet problems continue after trying
>>the troubleshooting procedures listed above then contact contact your
>>local Apple Authorized service provider or call Apple (at 1-800-SOS-APPLE
>>in the US) to be advised on how to have the logic board replaced.
>>
>>Q: What are the online services that customers can go to to get the
>>information? What are the pathways?
>>A: This information has been posted in the Technical Information Library
>>available on a number of online services including eWorld, Applelink,
>>Compuserve, and the Apple Computer web site on the internet.
>>
>>
>>Online and Internet Addresses/Pathways:
>>
>>
>>AppleLink
>>---------
>>AppleLink Services
>> Support
>> Tech Info Library
>>
>>
>>eWorld
>>------
>>Computer Center
>> Apple Customer Center
>> Apple Technical Support
>> Apple Tech Info Library
>>
>>
>>CompuServe
>>----------
>>Use the "Go" menu command, the keyword is APLTIL
>>
>>
>>World Wide Web
>>--------------
>>The URL for Apple's web site is: http://til.info.apple.com/til/til.html
>>
>>-------------------------------
>>
>>brenda: too bad you are not allowed to divulge this secret information to me.
>>
>>art welner
>>welner@kodak.com
>>
>

__________________________________________________________
Bill Ryan (bryan@wpine.com) "Keeping You Connected"
Principal Software Engineer "CU-SeeMe Master Licensee"
White Pine Software, Inc. http://www.wpine.com
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