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#1 2010-09-11 08:49:11

erotmica
New member
Registered: 2010-09-11
Posts: 4

Sporadic speeds

Hello all,

I recently set up a DNS 323 with two 2tb 5900RPM drives; both the same model and supported.

My machine is also funplugged.  I've since enabled SSH and made a script to change the volume name from Volume_1 to something else.

Anyhow, the machine gets about 8 to 12 mb/sec when using time machine.

But, if I stop said time machine backup and copy a 2gb movie, I can barely hit 1mb/sec.

After much rebooting and switching cables, i can hit 17mb/sec, but once I reboot or move something around, it goes back to that 1mb.

Meanwhile, at any given time. time machine gets that consistent 8 to 12.

This is all over gigabit using an 8 port dlink switch.
Very vexing!  Any ideas? 

Thanks!

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#2 2010-09-11 14:56:23

fordem
Member
Registered: 2007-01-26
Posts: 1938

Re: Sporadic speeds

I'm always curious as to why people, when discussing a transfer speed related issue, never seem to consider the "other" end.  There is no mention of what is on the other end of the transfer.

The data has to cone from somewhere, has to go to somewhere - is it not possible for the other end to have an impact on the transfer speed?

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#3 2010-09-11 18:09:00

erotmica
New member
Registered: 2010-09-11
Posts: 4

Re: Sporadic speeds

Well, instead of being a dick, you certainly could have asked for clarification.  So I will pretend you did, and answer you as such.

The machine is an iMac.  Wired directly to the switch. Using SMB.  Transfers to other local machines move quickly.

Any other obnoxiously phrased questions for someone that is politely asking for assistance?

Last edited by erotmica (2010-09-11 18:09:45)

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#4 2010-09-11 19:59:03

fordem
Member
Registered: 2007-01-26
Posts: 1938

Re: Sporadic speeds

Your iMac is no doubt running one of Apple's more recent, unix based OS's - I could be wrong, but I believe the sloth you describe has been traced to the SMB process running on the iMac - a search of the forum should reveal further details, and prove me right, or wrong.

Good luck.

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#5 2010-09-11 21:02:34

erotmica
New member
Registered: 2010-09-11
Posts: 4

Re: Sporadic speeds

Reformatted.  Reset.  Back to 18MB/sec on all transfers.

Thanks for the advice.

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#6 2010-09-13 21:02:21

erotmica
New member
Registered: 2010-09-11
Posts: 4

Re: Sporadic speeds

As an additional FYI, adding large readwrite = no to smb.conf also helped a lot, as per the advice here:
http://dns323.kood.org/howto:mac_osx_users

As another FYI to that, Apple's 'more recent unix based OS' has been unix based for 8 years.

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