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Backup problem over TCP/IP

By bheyman ·
I'm running about 15-G4's (new & old) 9.2.2,
1-imac 9.1, 1-7500 8.6, 1-G3 server 9.22.
Have 3 Cisco catalyst 3500 series XL
switches running through 3 floors in a high
rise. I' m on a VLAN going through a Xylon,
ESM module to separate macsfrom the PC
network. Everything on the mac side is totally
up to date. When I run backups at night using
Retrospect I get network communication
errors on folders larger than 200 MB. It will
start to backup (for instance) a 10GB folder but
only copy less than 200 files out of (let's say)
1100. However I can run complete backups
during the day while the users are working. I
am currently running a server backup script to
repoll what i didn't get the first time around this
work around is ok but it takes too long. I have
nothing going to sleep and TCP/IP is always
open, I have defragged the nodes and tried
various connections, disconnecting the VLAN
at night,as well as a different backup node.
Also the network speed changes almost daily.
All nodes and switches have UPS. What could
be causing this?
Please help!!!

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Backup problem over TCP/IP

by bmyers In reply to Backup problem over TCP/I ...

I'm not sure what night vs. day has to do with it. Here are a couple of suggestions from experience I've had with Retrospect. Try changing the duplex mode on the Retrospect Mac to Half Duplex either at the switch connection or the Mac if you can. You also need to absolutely maximize the amount of memory available to Retrospect. I have used these techniques to fix similar problems.

A side note: Why would you be doing network backups of all these Macs? Put everything on the server and back theserver up locally.

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Backup problem over TCP/IP

by bheyman In reply to Backup problem over TCP/I ...

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Backup problem over TCP/IP

by Mikel~T In reply to Backup problem over TCP/I ...

Are you sure you don't have the computers set to index their drives for some time in the middle of the night? This might be why the backup fails, or takes so exceptionally long.

Just a thought...I know the finder likes to hog as much memory as possible when it does its index job.

Hope this helps.

Mike

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Backup problem over TCP/IP

by bheyman In reply to Backup problem over TCP/I ...

I don't use indexing, it is a waste of time for what we
do here.

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Backup problem over TCP/IP

by bheyman In reply to Backup problem over TCP/I ...

I don't use indexing, it is a waste of time for what we
do here.

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Backup problem over TCP/IP

by bheyman In reply to Backup problem over TCP/I ...

The answer is this: I enabled portfast on all end user ports. Not only did this fix the backup problem but I got 2 other benefits. 1)Immediate better services over TCP/IP. 2) 10 baseT printers always show in the chooser now.

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Backup problem over TCP/IP

by bheyman In reply to Backup problem over TCP/I ...

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by bheyman In reply to Backup problem over TCP/I ...

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