2012 mini ethernet speed is slow

I never really checked until today but my ethernet port speeds are at 100 Mbps and not 1000 on my 2012 Mac Mini. I have tried different cables and no chnage. Why is this?

I think I may have found the issue. My Motorola modem (SB5120) only supports 100 Mbits/s so my Mac defaults to this speed. I guess I would need to buy a new modem that supports Gbit speeds.

Similar Messages

Mac mini ethernet speeds cut in half by snow leopard?

I upgraded an old mac mini (2,1) of mine from Leopard to Snow leopard this weekend. Same physical hardware and setup results in a dslreports.com speed test of the ethernet at about 50% of that of the leopard speeds (about 11.5Mbps over ether). I have another slightly newer C2D mini on SL that is doing 10Mbps on the same network. When I change startup disks to the SL disk, I end up with a max of about 4.5-5.5Mbps. Any ideas? I ran "Tune for High speed" on MLCC to open up the MTU size and such on both machines. Same results. I didn't try to update the existing partition (working Leopard) to SL, I scratch installed it on a new partiition.
Any ideas on what I should tweak to get the SL side to get to the same performance? I can always upgrade (painfully) the Leopard side and test it and then revert if it has the same poor results)...
Thanks,
Jim

Sorry, I checked all the obvious. The ifconfig shows both ETH0 running with the same parameters.
Wifi is off on both partitions.
Sadly no obvious issue as to the 50% loss of throughput.
Any other ideas out there? I also made sure IPv6 was off where possible. Again another Mac Mini on SL is also on the same ETH network doing 13Mb+ to the dslreports.com/stest sites...(the good partition is the same, bad is doing about 5-6Mb/s).
jim

E3000 has slow Ethernet speed but ok wireless Internet speed

My Cisco E3000 has slowed it's Ethernet speed so slow that it times out when going to Facebook, YouTube or any site that is complex. It worked fine until one day it just gave up. It's connected to DSL Modem with Ethernet To a Apple Mac G5 power PC There are two other older macs connected via Ethernet, same problem. When I took the router out of the chain, and connected G5 directly to modem, normal internet speed. My firmware is up to date. Both wireless bands work great. When I look at Cisco Connect, everything looks normal. factory settings. I worked great then something changed. help me, my kids are revolting.
Solved!
Go to Solution.

admojo wrote:
My Cisco E3000 has slowed it's Ethernet speed so slow that it times out when going to Facebook, YouTube or any site that is complex. It worked fine until one day it just gave up. It's connected to DSL Modem with Ethernet To a Apple Mac G5 power PC There are two other older macs connected via Ethernet, same problem. When I took the router out of the chain, and connected G5 directly to modem, normal internet speed. My firmware is up to date. Both wireless bands work great. When I look at Cisco Connect, everything looks normal. factory settings. I worked great then something changed. help me, my kids are revolting.
Yup, check the firewall settings. Since you said firmware is updated, then you may need to reset and reconfigure the router.

TC slow ethernet speed w/ mac mini, not anti-virus

new TC 1tb, running wireless to one macbook pro, one sony laptop, and ethernet to mac mini. update done to TC, including airport utility. no anti virus.
using it as the primary wireless source, with cable modem.
first backup was awfully slow, both by wireless, then do-over by ethernet.
speed on local network streaming mp4s through ethernet cable is bad to awful. copying files from TC to usb (in mac mini) is awful. searching for songs through itunes is slow (though library is 500gb).
the heat explanation is of course, just laughable. you give me a beautiful flat piece of equipment and you don't expect me to put my mac mini on top? terrible design flaw if true.
also, tried the re-boot and the shortened DCHP time.
no other good explanations that i could find.
So unless there are some great ideas out there, i guess
i should understand from all the threads that this thing just doesn't work as a primary file server. and its not so good at backup either.
its just too slow. please help if anyone has another suggestion, but i think that regardless i have to take it back.
glad i didn't erase my library from the WD My Book.
what a waste of my time this has been.

just bought a new 12" Powerbook and it will not connect to my local dial up ISP any faster than 28k. I've had the same ISP for over ten years. I've had the same phone line in my same apartment for over ten years. The G3 iBook I just sold connected at 56k almost every time. The G4 iMac I have at home connects at 56k almost every time. The Performa 6400 I used to have connected at 56k almost every time. The G4 Sawtooth I have in my music studio a couple of blocks away using a different phone line connects at 56k almost every time. Same ISP for over ten years, two different phone lines that work fine with four other Macs, the only Mac I've had that won't connect at 56k is my brand new Powerbook. It won't connect at 56k using OS 10.3.9 or 10.4 or 10.4.4. I tested the connection with CNET's online modem bandwidth test page and the Powerbook modem was connecting at about 26k.
so I took my PowerBook to the Apple store in San Francisco, they sent it to be repaired and when it came back said they replaced the modem, but it still won't connect at 56k when all my other Macs will.
so I took my PowerBook back to the Apple store in San Francisco, and they connected it to a phone line and got a 31k connection and told me, Well the modem connects, so as far as we're concerned it works, and 56k is only the maximum theoretical connection speed and Apple does not guarantee you will actually get that modem baud rate, so we are not going to do anything else about it. I told them that there is nothing theoretical about all my other Macs connecting to the same ISP at higher speeds than the PowerBook and that Apple should be able to test the PowerBook to determine if their own tech guys can get a 56k connection with my PowerBook. The Apple store "genius" called his manager, who refused to do any more work on the computer.
iMac. Sawtooth, Powerbook Mac OS X (10.3.9)

My 2012 Mini OS 10.7.5 cannot see the Ethernet connection to my Actiontec GT701 WG. The Network Preferences says "cable unplugged". The WiFi connection is working fine. Please Thank You

My 2012 Mini OS 10.7.5 cannot see the Ethernet connection to my Actiontec GT701 WG. The Network Preferences says "cable unplugged". The WiFi connection is working fine. Please Thank You

Never mind, problem solved. When I retunred to the Network tab the message had changed to "connected, no IP address" so I got that from the WiFi tab and configured the Ethernet manually. Have a nice day @:-)#

My mac mini is running very slow all of a sudden, how can i restore it's speed?

my mac mini is running very slow all of a sudden, how can i restore it's speed?

This procedure is a diagnostic test. It changes nothing, for better or worse, and therefore will not, in itself, solve your problem.
If you don't already have a current backup, back up all data before doing anything else. The backup is necessary on general principle, not because of anything in the test procedure. There are ways to back up a computer that isn't fully functional. Ask if you need guidance.
Below are instructions to run a UNIX shell script, a type of program. All it does is to gather information about the state of your computer. That information goes nowhere unless you choose to share it on this page. However, you should be cautious about running a program at the instance of a stranger on a public message board. If you have doubts, search this site for other discussions in which this procedure has been followed without any report of ill effects. If you can't satisfy yourself that the instructions are safe, don't follow them.
Here's a summary of what you need to do: Copy a line of text from this web page into the window of another application. Wait about a minute. Then paste some other text, which will have been copied automatically, back into a reply on this page. The sequence is: copy, paste, wait, paste again. Details follow.
You may have started the computer in "safe" mode. Preferably, these steps should be taken in “normal” mode. If the system is now in safe mode and works well enough in normal mode to run the test, restart as usual. If you can only test in safe mode, do that.
If you have more than one user, and the one affected by the problem is not an administrator, then please run the test twice: once while logged in as the affected user, and once as an administrator. The results may be different. The user that is created automatically on a new computer when you start it for the first time is an administrator. If you can't log in as an administrator, test as the affected user. Most personal Macs have only one user, and in that case this paragraph doesn’t apply.
The script is a single long line, all of which must be selected. You can accomplish this easily by triple-clicking anywhere in the line. The whole line will highlight, though you may not see all of it in your browser, and you can then copy it. If you try to select the line by dragging across the part you can see, you won't get all of it.
Triple-click anywhere in the line of text below on this page to select it:
clear; shopt -s extglob; Fb='%s\n\t(%s)\n'; Fm='\n%s:\n\n%s\n'; Fs='\n%s: %s\n'; Fu='User %s%%\t\tSystem %s%%'; PB="/usr/libexec/PlistBuddy -c Print"; A () { [[ a -eq 0 ]]; }; R () { o=; [[ r -eq 0 ]]; }; Pm () { [[ "$o" ]] && o=`sed 's/^ */ /' <<< "$o"` && printf "$Fm" "$1" "$o"; }; Pc () { o=`egrep -v '^[[:blank:]]*($|#)' "$2"`; Pm "$1"; }; Pp () { o=`$PB "$2" | awk -F'= ' \/$3'/{print $2}'`; Pm "$1"; }; Ps () { o="${o##+( )}"; [[ ! "$o" =~ ^0?$ ]] && printf "$Fs" "$1" "$o"; }; id | grep -qw '80(admin)'; a=$?; A && sudo true; r=$?; t=`date +%s`; clear; { A || echo $'No admin access\n'; A && ! R && echo $'No root access\n'; system_profiler SPSoftwareDataType | sed '8!d;s/^ *//'; o=`system_profiler SPDiagnosticsDataType | sed '5,6!d'`; [[ "$o" =~ Pass ]] || Pm "POST"; o=`pmset -g therm | sed 's/^.*CP/CP/'`; grep -q 'No th' <<< "$o" && o=; Pm "Thermal conditions"; o=`pmset -g sysload | grep -v :`; grep -q '= [^GO]' <<< "$o" || o=; Pm "System load advisory"; o=`nvram boot-args | awk '{$1=""; print}'`; Ps "boot-args"; o=`ls /L*/L*/Dia*/*.panic | wc -l`; Ps "Panics"; o=`ls /L*/L*/Dia*/*.c* | tail`; Pm "System crash logs"; o=`ls L*/L*/Dia* | tail`; Pm "User crash logs"; o=`syslog -F bsd -k Sender kernel -k Message CReq 'GPU |hfs: Ru|I/O e|n Cause: -|NVDA\(|pagin|SATA W|timed? ?o' | tail -n25 | awk '/:/{$4=""; $5=""; print}'`; Pm "Kernel messages"; o=`df -m / | awk 'NR==2 {print $4}'`; [[ o -lt 5120 ]] && Ps "Free space (MiB)"; o=$(($(vm_stat | awk '/eo/{sub("\\.",""); print $2}')/256)); o=$((o>=1024?o:0)); Ps "Pageouts (MiB)"; s=( `sar -u 1 10 | sed '$!d'` ); [[ s[4] -lt 90 ]] && o=`printf "$Fu" ${s[1]} ${s[3]}` || o=; Pm "Total CPU usage" && s=(`ps acrx -o comm,ruid,%cpu | sed '2!d'`); o=${s[2]}%; Ps "CPU usage by process $s of user ${s[1]}"; s=(`top -R -l1 -n1 -o prt -stats command,uid,prt | sed '$!d'`); s[2]=${s[2]%[+-]}; o=$((s[2]>=25000?s[2]:0)); Ps "Mach ports used by process $s of user ${s[1]}"; o=`kextstat -kl | grep -v com\\.apple | cut -c53- | cut -d\< -f1`; Pm "Loaded extrinsic kernel extensions"; R && o=`sudo launchctl list | sed 1d | awk '!/0x|com\.(apple|openssh|vix\.cron)|org\.(amav|apac|calendarse|cups|dove|isc|ntp|post[fg]|x)/{print $3}'`; Pm "Extrinsic system jobs"; o=`launchctl list | sed 1d | awk '!/0x|com\.apple|org\.(x|openbsd)|\.[0-9]+$/{print $3}'`; Pm "Extrinsic agents"; for d in {/,}L*/{La,Priv,Sta}*; do o=`ls -A "$d" | egrep -v '^(\.DS_Store$|com\.apple\.)'`; Pm "$d"; done; o=`find -L /S*/L*/E* {/,}L*/{A*d,Compon,Ex,In,Keyb,Mail,P*P,Qu,Scripti,Servi,Spo}* -type d -name Contents -prune | while read d; do ID=$($PB\ :CFBundleIdentifier "$d/Info.plist") || ID="No bundle ID"; egrep -qv "^com\.apple\.[^x]|Accusys|ArcMSR|ATTO|HDPro|HighPoint|driver\.stex|hp-fax|\.hpio|JMicron|microsoft\.MDI|print|SoftRAID" <<< $ID && printf "$Fb" "${d%/Contents}" "$ID"; done`; Pm "Extrinsic loadable bundles"; o=`find /u*/{,*/}lib -type f -exec sh -c 'file -b "$1" | grep -qw shared && ! codesign -v "$1"' {} {} \; -print`; Pm "Unsigned shared libraries"; o=`launchctl getenv DYLD_INSERT_LIBRARIES`; Pm "Inserted libraries"; o=`find {,/u*/lo*}/e*/periodic -type f -mtime -10d`; Pm "Modified periodic scripts"; o=`scutil --proxy | grep Prox`; Pm "Proxies"; o=`scutil --dns | awk '/r\[0\] /{if ($NF !~ /^1(0|72\.(1[6-9]|2[0-9]|3[0-1])|92\.168)\./) print $NF; exit}'`; Ps "DNS"; R && o=`sudo profiles -P | grep :`; Pm "Profiles"; for f in fstab sysctl.conf crontab launchd.conf; do Pc $f /etc/$f; done; Pc "hosts" <(egrep -v '(local|broadcast)host' /etc/hosts); Pc "User launchd" ~/.launchd; R && Pc "Root crontab" <(sudo crontab -l); Pc "User crontab" <(crontab -l); R && o=`sudo defaults read com.apple.loginwindow LoginHook`; Pm "Login hook"; Pp "Global login items" /L*/P*/loginw* Path; Pp "User login items" L*/P*/*loginit* Name; Pp "Safari extensions" L*/Saf*/*/E*.plist Bundle | sed 's/\..*$//;s/-[1-9]$//'; o=`find ~ $TMPDIR.. $ -flags +sappnd,schg,uappnd,uchg -o ! -user $UID -o ! -perm -600 $ | wc -l`; Ps "Restricted user files"; cd; o=`system_profiler SPFontsDataType | egrep "Valid: N|Duplicate: Y" | wc -l`; Ps "Font problems"; o=`find L*/{Con,Pref}* -type f ! -size 0 -name *.plist ! -exec sh -c 'plutil -s "$1" >&-' {} {} \; -print`; Pm "Bad plists"; d=(Desktop L*/Keyc*); n=(20 7); for i in {0..1}; do o=`find "${d[$i]}" -type f -maxdepth 1 | wc -l`; o=$((o<=n[$i]?0:o)); Ps "${d[$i]##*/} files"; done; o=$((`date +%s`-t)); Ps "Elapsed time (s)"; } 2>/dev/null | pbcopy; exit 2>&-
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Why is my iPhone 5 S WiFi speed 50% slower than my MacBook Air 2012?

Why is my iPhone 5 S WiFi speed 50% slower than my MacBook Air 2012?

Hello jagimc,
Thanks for using Apple Support Communities.
For more information on this, take a look at this article:
iOS: Troubleshooting Wi-Fi networks and connections
http://support.apple.com/kb/ts1398
Wi-Fi disconnects, or signal strength is less than expected
Move closer to the Wi-Fi router (access point).
Check for sources of potential interference.
Remove any case, stand, or other accessories from your iOS device and see if signal strength improves.
Reset network settings by tapping Settings > General > Reset > Reset Network Settings.
Note: This will reset all network settings including: previously connected Wi-Fi networks and passwords, recently used Bluetooth accessories, VPN and APN settings.
Best of luck,
Mario

Mac Mini ethernet read / write speeds different

Hello.
I have a 2.3 GHz Intel Core i5 Mac Mini running OS X Version 10.8.4.
I recently bought a Synology ds212j NAS, and started to transfer some files across my home LAN.
Everything was running fine until I noticed that the transfer had started to go really slowly.
At first I thought it was the NAS, but after exhaustive testing I think the problem is with the Mac Mini ethernet port.
I ran the LAN Speed Test program against the NAS and got the following results (with the NAS plugged directly into the Mac Mini):
Writing (Upload): 54 Mbps
Reading (Download): 689 Mbps
I get similar results when running against my time capsule:
Writing (Upload): 44 Mbps
Reading (Download): 767 Mbps
Can anyone explain what might be going on? Is it a defective ethernet port? Are there any steps I can take to further diagnose / resolve the issue?
Thanks,
Scott

Thanks for replying Johnathan.
I understand that write / read speeds can be different on a hard disk, but the key thing here is that the speeds changed suddenly - I was getting similar write / read speeds and then something changed (I don't have speed statistics for that).
One other thing to note is that if I plug in an external drive via USB I get write / read speeds the same.
This all makes me think that something has changed with the Ethernet port. Either it is malfunctioning or there is a cache issue etc. The problem is that I don't know how to do further diagnosis, or how to resolve.
Scott

Ethernet speed slow since security update 2014-001

Dear community
I'm running a Mac Pro early 2009. OSX 10.7.5. Internet through Ethernet cable connected to a dlink router dsl-g624t. This has been my setup for years. All worked fine.
As of last few days (corresponds with my updating the system with apples security update 2014-001) that my Internet download speed is 0.01 Mbps it used to be 5.0 Mbps. I can't connect to anything. Sometimes it's ok for a few seconds then dies down completely. Connecting to the routers own IP address is slow as well.
I've plugged the Ethernet cable into another mac (laptop) and all runs at approx 5.0 Mbps as it should. I've connected the Ethernet cable between the Mac Pro and the mac laptop and transferred a 1Gb file both ways with out any noticeable speed issues. I've connected my ipad wirelessly to the router and I can achieve good speeds, again about 5.0 Mbps. Same with my iPhone.
In system pref/network it states the Ethernet 1 is connected, with an IP address etc. as if there was no problem.
What is going on. The Ethernet cable works, the router works, a connection over Ethernet between my two macs works.
What doesn't work anymore is my Mac Pro connecting to the router via Ethernet. It's so slow it can't load a simple web page in either safari or Firefox, other web connecting apps time out as well.
Someone please help
With much thanks in anticipation
Bmw75

Going to reply to my own question here.
I've never let a mac get the best of me in 15years of working with them but this problem had me stumped. Anyway I did figure it out. Not being very experienced with network issues I had to tincer about a bit. Anyway the fix for this should someone else have it can be found here in... system preferences/network/ethernet (1or2)/advanced.../Hardware/ once in this option window I had to change 'configure' to 'manual' and 'speed' to '10baseT/UTP' and 'Duplex' to 'full-duplex' and 'MTU' to 'Standard 1500'. I then had my full ethernet speed back. I believe it had all been changed by the recent security update.
I hope that helps someone sometime.

Internet speed is slow with Mountain Lion 10.8.2

Internet speed is slow with Mountain Lion 10.8.2, but booting in separate drive running 10.6 is fine. Tried renewing DHCP, zapped the PRAM, ran disk utilities, and sudo chron. No change. I am running 2008 Mac Pro, 8 gig ram, AT&T DSL via ethernet. Getting 0.15Mbps instead of 3Mbps.

Did you try creating a new location and deleting the old one? Just renewing the DCHP on its own may not be enough. Follow all the instructions here, first:
http://osxdaily.com/2012/08/02/fix-os-x-mountain-lion-wireless-connection-proble ms/
If that doesn't work, have a look at my further instructions here:
http://applehelpwriter.wordpress.com/2012/08/07/problems-with-wifi-safari-and-mo untain-lion/
(ToU Disclaimer: links to my site contain other links which promote my services as a technical writer)

Not getting full Gigabit Ethernet Speed on iMac Core Duo

I am using Airport to connect to a Linksys Wireless Access Point connected to my DSL modem. I am using ethernet to connect to a 3Com OfficeConnect 8-port Gigabit switch. I have 2x 500 GB LaCie Ethernet Disk Mini's (with Gigabit interface) connected to the switch.
The lights on the switch tell me that the drives and iMac are connected at full speed, however I can transfer a 650MB .dmg file to a firewire 400 drive in 1/4 of the time it takes to transfer the same file to one of the gigabit ethernet drives.
running ifocnfig en0 returns:
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet6 fe80::216:cbff:fe94:747b%en0 prefixlen 64 scopeid 0x4
inet 192.168.0.1 netmask 0xffffff00 broadcast 192.168.0.255
ether 00:16:cb:94:74:7b
media: autoselect (1000baseT <full-duplex,flow-control>) status: active
supported media: autoselect 10baseT/UTP <half-duplex> 10baseT/UTP <full-duplex> 10baseT/UTP <full-duplex,hw-loopback> 10baseT/UTP <full-duplex,flow-control> 100baseTX <half-duplex> 100baseTX <full-duplex> 100baseTX <full-duplex,hw-loopback> 100baseTX <full-duplex,flow-control> 1000baseT <full-duplex> 1000baseT <full-duplex,hw-loopback> 1000baseT <full-duplex,flow-control> none
I have no idea what that all means, but i do know that I am not getting gigabit ethernet speed.
Can anyone help?
Thanks

If you are transferring data via wireless then you cannot approach Gigabit Ethernet speed. 802.11g has a maximum transfer speed of 54 Mbps while 802.11n is about 130 Mbps. This is much slower than a FW400 port. Your router and switch must both be Gigabit capable and your drive must be connected to Ethernet to even hope to achieve Gigabit speeds - no wireless.

Time capsule download speeds are slow

iMac <======>Time capsule (bridge mode) <=====> 10/100 ethernet switch <====> Comcast router/modem Arris TG862
Multiple iDevices are wirelessly connected to Time capsule because Arris TG862 couldn't handle more than 10 wireless devices without kicking them off.
Time capsule is in bridge mode, 4th gen, 7.6.4.
Have been running this configuration for over a year and download speeds @ 50Mbs for the iMac that is wired to the time capsule and an iMac that is wirelessly connected to time capsule. AppeTV is hardwired to 10/100 ethernet switch as well, and has never had a problem before download / streaming movies.
In the past week, the wired download speed of the iMac has crawled down to 5-6 Mbs. Wireless connections are .5-1 Mbs.
I have unplugged all devices, waited 10 mins, plugged in router/modem, waited 5 mins, plugged in switch, waited 1 min, plugged in TC, waited 5 mins, ran a test on Speedtest.net - still getting 5 Mbs wired and slower on wifi. If I unplug the ethernet cable from the TC (WAN) and plug it into the iMac directly, I get 57 Mbs download speed on Speedtest.net. Why would the TC suddenly be slowing down download speeds. In all configurations, the upload speed is still 10-11 Mbs. It appears that only download speeds are affected. Any suggestions?

Yes, I've tried moving the ethernet cable from the iMac to a different LAN port on the TC. Same slow speed. The wireless download speeds are slow too, seems like the WAN connection is "throttling" download speeds no matter if it's wired or wireless.
I have pressed the reset button on the back of the TC until the front light blinks amber. Then I went thru the setup to have it connected Ethernet, Bridge mode, create a wireless network, and DHCP from the router. I got 12 Mbs download speed for the wired connection after doing this the first time. Fifteen minutes later I tested it again using Speedtest.net and the download speed for the wired connection had fallen to 5 Mbs. I unplugged the TC, waited a half hour, held the reset button down while I plugged it in, went thru the setup again, and still had a download speed of only 4 Mbs when I was done.
I assumed if the switch on the TC went bad that it wouldn't work at all, not just be slow.
Any other suggestions?

This might be a simple question. On those sites that do not differentiate between models when on the internet I.e. Facebook when after your comment and you cannot hit "enter" on an iPad for examp. And speed is slow to connect. What is = to post?

This might be a simple question. On those sites that do not differentiate between CRT, laptop, tablet etc. such as an iPad Mini and using the Facebook site fir example when going to post a comment and you do not have a enter button on the IPad and the speed is slow how do you get your comments to post if we do not have a enter button?
<Email Edited By Host>

I don't have facebook so I cannot answer but for your personal security, I have asked the hosts to remove your e-mail address. It is very unwise to publish this.

My Mac mini's WiFi is slow

Hi, my Mac mini’s WiFi is slow: it’s stuck when loading a page with Safari.
Help please, I want to browse the Internet!
The WiFi signal is best (4 bars):
Here’s a screenshot if you’re interested:

Sorry for a late reply, didn't notice the activity in this thread. Try changing the channel in your router's settings.
To do it:
1. Open the Wi-Fi Scan tool http://osxdaily.com/2012/07/31/wi-fi-scanner-mac-os-x-mountain-lion/
2. Find an unused channel - steps in this screenshot:
2. Change the channel in your router's settings.

SCDPM 2012 - backups are running dead slow

SCDPM 2012 - backups are running dead slow.
Below is the details of software and hardware.
Server OS : WIndows Server 2008 R2
DPM version : SCDPM 2012 , Version : 4.0.1920.0
Server Hardware : Prolinet BL 460C G1
Tape drive - LTO 4 drives
Network : HP NC325m PCIe Quad Port Adapter , driver version 16.1.0.1 ( 10/16/2013 )
Could you please help me to resolve this issue. Thanks
Raghavendra Bhat

we've got a Windows Server 2008 R2 server that has been running DPM v4.0.1920.0 since it was released in
10/18/2012.
we are using D2D2T
We did have tape throughput performance issues initially, but after switching to the in-box LTO tape-drive drivers included with the operating system (instead on HP drivers), and setting several registry values associated with tape ports, we got it working.
see http://social.technet.microsoft.com/Forums/en-US/3cda9c6a-688d-4c2d-8dc0-9d04b8ea1f05/dpm-2012-not-filling-lto3-tapes?forum=dpmtapebackuprecovery
The best advice to speed up the D2D part of the backup is to configure any antivirus software if present to not perform any real-time scanning made by the DPMRA.EXE and DRSR.EXE executables.
Don't backup the system drive of the DPM server to tape, because there are as many junctions as you have protected volumes define, which makes the backup not work at all.
Also, for the system being backed up D2D,

2012 mini ethernet speed is slow

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