On Sep 20, 2008, at 8:19 PM, Tannis Baker wrote:
However, I thought I would Verify the iMac Disk again - and now it is
showing an Invalid "node" structure which needs to be repaired. Disk
Utility can't repair. (I guess I better invest in Disk Warrior but
I have
never had a disk problem before now....)
So, Disk Repair is probably a red herring - but I can't think what is
causing this and why the machine would work on his desk and not on
mine
when my laptop does work on mine.
(BTW, do you think these new and consistent volume problems are
related
to the new HD if not to the internet problems?)
The recurring drive problems can be caused by a bad drive (among
other things). And yes, they can cause the speed issues you are
seeing (basically, if you have drive problems, then the OS can cause
all sorts of odd problems).
If you have a clone of the drive and can easily do another erase and
restore, I would do so. Only this time, I would not do a regular
erase of the drive. I would Zero the drive. And you may want to do a
multi pass Zero (do the 7 pass, don't bother with the 35). Zeroing
the drive will map out any bad blocks in the drive and remove them
from use. Doing a multi pass will stress the drive and help make sure
it gets any that are marginal. If you have a utility like Tech Tool
that can check for bad blocks, I'd do that check after the Zero Erase
to be sure it got everything. If it didn't, then I'd consider the
drive suspect and look at swapping it out (if it is brand new, it is
likely under warranty).
The other thing to check regarding your speed issue (as although the
drive problems can cause it, they could also have nothing to do with
it), reboot your router and power cycle any hubs or switches that are
between your Mac and the internet. You could have a port that is
stuck and not allowing proper data transfers.
In addition, after doing the reboot of the network items, check what
link speed you are getting. You can check this in the System
Profiler under Network, check the Ethernet, it is at the bottom. It
is possible the link isn't good and it may be spending a lot of time
renegotiating. You can change the link settings in the Network System
Pref (go to the Ethernet tab, change the popup from Automatic to
Manual and then set what you want, you can start at 10 Mbs Half-
Duplex and see how your connection is, then step up from there).
Finally, do you have ANY Windows Vista or Windows 2008 machines
running on your network? If so, they could be screwing up your
router, although then you should see the same errors with your other
Mac, so that isn't as likely (if you do have Vista/2008 machines, I
can get into more details of what they could possibly be doing and
how to fix it).
But first and foremost, before you worry too much about your network
issues, I'd fix the drive issues. The fact that you had drive
problems twice in a short period of time is not good, and is only
going to cause you much more severe problems soon if not handled.
-chris
<www.mythtech.net>
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