Hi.  1st post on this list, I'll try to keep it as condensed as possible,
but this problem....

I've got a large number of Mac 6100s with Sonnet Crescendo G3 cards
installed, running OS9  I'm using Retrospect 4.2 over TCP/IP.  The problem
is that these macs will often return an error -519 (network communication
failed) at different points in the backup; sometimes while the remote is
being scanned, sometimes 10% of the way through, or 70%, or during the
verification.  These errors happen immediately, meaning the server doesn't
display the "Net Retry" window and try to reconnect.  It, or the remote,
just drops the connection like a hot potato.  After that happens, I can
Immediate -> Backup the remote right away and either finish the backup or
see the whole thing happen again, depending on my luck.
        If I remove the Crescendo card from the remote or disable the
driver for it, the problem goes away.  If I keep the hardware as it is and
switch to backing up over Appletalk, the problem goes away.  A 6100 without
a Crescendo will have a spotless backup record until I install a Crescendo
in it, but the TCP/Appletalk factor indicates that the problem is a little
deeper than just hardware.  6100s with Crescendos and OS 8.x backup fine
too.  Finally, Macs other than 6100s and 7100s, but with OS9 and a
crescendo G3 have no problem.

SO..... what's up with Retrospect, TCP, Sonnet Crescendos and 61/7100 macs?
Is anyone else experiencing problems like this, or NOT having these
problems with this same hardware?



Hunter Parrot,  I.S. Administrator
New England Biolabs Inc.  32 Tozer Rd.  Beverly, MA. 01915
978-927-5054 ext 329  Fax: 978-921-1350

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