Ethernet intranet transfer speed issue

I followed these directions after suspecting my transfer speed was not what it used to be. I remember when transferring files via ethernet that the speed was quite astounding.
directions:
Network>Built-in Ethernet>Ethernet Tab>Configure drop down>Manually (Advanced), then manually set the Speed to 1000baseT on both, and the Duplex to full, then Apply... sometimes a reboot is needed.
After this resulted in no speed difference, I noticed my cables were regular cat 5, not cat 5e or 6.
So I bought some name brand cat 6 cables.
I am using a gigabit router Dlink dir 655 i believe, with cat 6 cables, but it takes about 1 minute to transfer 1 gig of data between my macbook and my G5 dual 2.3.
I believe this is not optimal speed, it seems i am still stuck on 100mbps.
Help?

What speed HDs on both ends? What size/how many files?
Seems your getting about 16MB/Sec which sounds like an HDD limit.
My iMac/2.4Ghz/SATA 7200RPM does this...
Transfer Size Sequential Read Sequential Write Random Read Random Write
4 KBytes 21.659 MB/Sec 26.130 MB/Sec 0.573 MB/Sec 9.953 MB/Sec
8 KBytes 41.826 MB/Sec 42.044 MB/Sec 1.265 MB/Sec 9.967 MB/Sec
16 KBytes 66.584 MB/Sec 67.989 MB/Sec 8.902 MB/Sec 13.782 MB/Sec
32 KBytes 85.443 MB/Sec 77.280 MB/Sec 4.541 MB/Sec 19.093 MB/Sec
64 KBytes 99.141 MB/Sec 101.458 MB/Sec 8.791 MB/Sec 23.077 MB/Sec
128 KBytes 101.405 MB/Sec 101.466 MB/Sec 16.456 MB/Sec 27.584 MB/Sec
256 KBytes 100.920 MB/Sec 101.373 MB/Sec 31.681 MB/Sec 36.889 MB/Sec
512 KBytes 101.425 MB/Sec 100.816 MB/Sec 33.854 MB/Sec 46.232 MB/Sec
1024 KBytes 96.340 MB/Sec 101.371 MB/Sec 45.283 MB/Sec 40.172 MB/Sec
Standard Ave 79.416 MB/Sec 79.992 MB/Sec 16.816 MB/Sec 25.194 MB/Sec
Not even close to the Max 125MB/Sec Gigabit Ethernet.

Similar Messages

Very low transfer speed issue on SUN4270 M2 server connected with nexus 5548 switch on 10GB fiber.

                   Hi,
I have 2 SUN 4270 M2 servers connected with Nexus 5548 switch over 10Gb fiber card. I am getting performance of just 60 MB per second while transfer of 5Gb file across 2 servers. The similar speed i use to get on 1Gb network also. Please suggest how to improve the tranfer speed. On servers, ports ET4 and ETH5 are bonded in bond0 with mode=1. The server envrionment will be used for OVS 2.2.2.
Below are the details of network configuration on server. I quick help will be highly appriciated--
[root@host1 network-scripts]# ifconfig eth4
eth4      Link encap:Ethernet HWaddr 90:E2:BA:0E:22:4C
          UP BROADCAST RUNNING SLAVE MULTICAST MTU:9000 Metric:1
          RX packets:5648589 errors:215 dropped:0 overruns:0 frame:215
          TX packets:3741680 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:2492781394 (2.3 GiB) TX bytes:3911207623 (3.6 GiB)
[root@host1 network-scripts]# ifconfig eth5
eth5      Link encap:Ethernet HWaddr 90:E2:BA:0E:22:4C
          UP BROADCAST RUNNING SLAVE MULTICAST MTU:9000 Metric:1
          RX packets:52961 errors:215 dropped:0 overruns:0 frame:215
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:3916644 (3.7 MiB) TX bytes:0 (0.0 b)
[root@host1 network-scripts]# ethtool eth4
Settings for eth4:
        Supported ports: [ FIBRE ]
        Supported link modes:   1000baseT/Full
        Supports auto-negotiation: Yes
        Advertised link modes: 1000baseT/Full
                                10000baseT/Full
        Advertised auto-negotiation: Yes
        Speed: 10000Mb/s
        Duplex: Full
        Port: FIBRE
        PHYAD: 0
        Transceiver: external
        Auto-negotiation: on
        Supports Wake-on: d
        Wake-on: d
        Current message level: 0x00000007 (7)
        Link detected: yes
[root@host1 network-scripts]# ethtool eth5
Settings for eth5:
        Supported ports: [ FIBRE ]
        Supported link modes:   1000baseT/Full
        Supports auto-negotiation: Yes
        Advertised link modes: 1000baseT/Full
                                10000baseT/Full
        Advertised auto-negotiation: Yes
        Speed: 10000Mb/s
        Duplex: Full
        Port: FIBRE
        PHYAD: 0
        Transceiver: external
        Auto-negotiation: on
        Supports Wake-on: d
        Wake-on: d
        Current message level: 0x00000007 (7)
        Link detected: yes
[root@host1 network-scripts]#
[root@host1 network-scripts]# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.2.4 (January 28, 2008)
Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eth4
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: eth4
MII Status: up
Link Failure Count: 0
Permanent HW addr: 90:e2:ba:0e:22:4c
Slave Interface: eth5
MII Status: up
Link Failure Count: 0
Permanent HW addr: 90:e2:ba:0e:22:4d
[root@host1 network-scripts]# modinfo ixgbe | grep ver
filename:       /lib/modules/2.6.18-128.2.1.4.44.el5xen/kernel/drivers/net/ixgbe/ixgbe.ko
version:        3.9.17-NAPI
description:    Intel(R) 10 Gigabit PCI Express Network Driver
srcversion:     31C6EB13C4FA6749DF3BDF5
vermagic:       2.6.18-128.2.1.4.44.el5xen SMP mod_unload Xen 686 REGPARM 4KSTACKS gcc-4.1
[root@host1 network-scripts]#brctl show
bridge name     bridge id               STP enabled     interfaces
vlan301         8000.90e2ba0e224c       no              bond0.301
vlan302         8000.90e2ba0e224c       no              vif1.0
                                                        bond0.302
vlan303         8000.90e2ba0e224c       no              bond0.303
vlan304         8000.90e2ba0e224c       no              bond0.304
[root@host2 test]# ifconfig eth5
eth5      Link encap:Ethernet HWaddr 90:E2:BA:0F:C3:15
          UP BROADCAST RUNNING SLAVE MULTICAST MTU:9000 Metric:1
          RX packets:4416730 errors:215 dropped:0 overruns:0 frame:215
          TX packets:2617152 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:190977431 (182.1 MiB) TX bytes:3114347186 (2.9 GiB)
[root@host2 network-scripts]# ifconfig eth4
eth4      Link encap:Ethernet HWaddr 90:E2:BA:0F:C3:15
          UP BROADCAST RUNNING SLAVE MULTICAST MTU:9000 Metric:1
          RX packets:28616 errors:3 dropped:0 overruns:0 frame:3
          TX packets:424 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:4982317 (4.7 MiB) TX bytes:80029 (78.1 KiB)
[root@host2 test]#
[root@host2 network-scripts]# ethtool eth4
Settings for eth4:
        Supported ports: [ FIBRE ]
        Supported link modes:   1000baseT/Full
        Supports auto-negotiation: Yes
        Advertised link modes: 1000baseT/Full
                                10000baseT/Full
        Advertised auto-negotiation: Yes
        Speed: 10000Mb/s
        Duplex: Full
        Port: FIBRE
        PHYAD: 0
        Transceiver: external
        Auto-negotiation: on
        Supports Wake-on: d
        Wake-on: d
        Current message level: 0x00000007 (7)
        Link detected: yes
[root@host2 test]# ethtool eth5
Settings for eth5:
        Supported ports: [ FIBRE ]
        Supported link modes:   1000baseT/Full
        Supports auto-negotiation: Yes
        Advertised link modes: 1000baseT/Full
                                10000baseT/Full
        Advertised auto-negotiation: Yes
        Speed: 10000Mb/s
        Duplex: Full
        Port: FIBRE
        PHYAD: 0
        Transceiver: external
        Auto-negotiation: on
        Supports Wake-on: d
        Wake-on: d
        Current message level: 0x00000007 (7)
        Link detected: yes
[root@host2 network-scripts]# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.2.4 (January 28, 2008)
Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eth5
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: eth5
MII Status: up
Link Failure Count: 0
Permanent HW addr: 90:e2:ba:0f:c3:14
Slave Interface: eth4
MII Status: up
Link Failure Count: 0
Permanent HW addr: 90:e2:ba:0f:c3:15
[root@host2 network-scripts]# modinfo ixgbe | grep ver
filename:       /lib/modules/2.6.18-128.2.1.4.44.el5xen/kernel/drivers/net/ixgbe/ixgbe.ko
version:        3.9.17-NAPI
description:    Intel(R) 10 Gigabit PCI Express Network Driver
srcversion:     31C6EB13C4FA6749DF3BDF5
vermagic:       2.6.18-128.2.1.4.44.el5xen SMP mod_unload Xen 686 REGPARM 4KSTACKS gcc-4.1
[root@host2 network-scripts]#brctl show
bridge name     bridge id               STP enabled     interfaces
vlan301         8000.90e2ba0fc315       no              bond0.301
vlan302         8000.90e2ba0fc315       no              bond0.302
vlan303         8000.90e2ba0fc315       no              bond0.303
vlan304         8000.90e2ba0fc315       no              vif1.0
       bond0.304
Thanks....
Jay

Hi,
Thanks for reply..but the RX errors count is keep on increasing and the transfer speed between 2 servers are max 60MB/ps on 10GB FC card. Even on storage also, i am getting the same speed when i try to transfer data from server to storage on 10GB FC card. Servers and storage are connected through Nexus 5548 switch.
#ifconfig eth5
eth5      Link encap:Ethernet HWaddr 90:E2:BA:0E:22:4C
          UP BROADCAST RUNNING SLAVE MULTICAST MTU:9000 Metric:1
          RX packets:21187303 errors:1330 dropped:0 overruns:0 frame:1330
          TX packets:17805543 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:624978785 (596.0 MiB) TX bytes:2897603160 (2.6 GiB)
JP

Thunderbolt to Ethernet adapter transfer speed

I am connecting mbp retina to the time capsule via Ethernet. What is the best cable to use, cat 5e or cat 6, would there be a noticeable difference? (I am using the thunderbolt to Ethernet adapter). What would be a normal transfer time for 100GB of data?

Although either cable will work fine with the speeds available today, you can future proof yourself a bit with a CAT6 cable.
Data normally moves over Ethernet to the Time Capsule at 25-30 GB per hour, so allow 3-4 hours for the transfer time.

Very slow Ethernet & WIFI transfer speeds - MC340X/A

Hi.
I recently purchased an Airport Extreme model no. MC340X/A being used as an isolated standalone network with 3 gigabit ethernet clients and a couple of n WIFI clients, and no other base station or Hub/Switch in the network.
One of the problems I have is that I'm experiencing very slow network transfers between both ethernet clients and wifi clients of any combination. The maximum transfer rate I can achieve between ethernet to ethernet, WIFI to WIFI, or WIFI to ethernet clients connected to the MC340X/A is 2.5 MBytes / second, on both 2.4 and 5gig bands using n capable WIFI cards and gigabit ethernet cards.
I have performed a hard reset of the device with no improvement.
The firmware is version 7.5 and it appears there is no older firmware to revert back to for this model.
I have an older Airport Extreme n Gigabit model which achieves 7 to 12 MBytes / Second transfers over WIFI and at least 20MBytes / Second over ethernet to ethernet using the same clients, in exactly the same location etc.
Do I have a faulty unit and does it need to be returned? It is only 2 days old and want to sort it out within my 7 day return policy.
Thanks for any help.
Cheers
Cat

Sorry folks, I seem to have worked it out.
I found on another thread that saving the setup info as a profile and re-loading the saved profile has helped some people. This appears to have cured the slow transfers for me so far.

Syncing problem between iphone and two computers. Transfer speed issue.

An issue that I've recently started having problems with is syncing my contacts and calendar into two computers and my iphone. I've recently pickup up a new macbook pro to use when out of the office but my mac at work is still my main computer.
The problem is the two computers get equal usage but they also each get their own random entries as well as the iphone which requires me to sync the two to my iphone a few times a week. The computer at work runs the sync fine and is my main computer with the music stored on it. The sync with that one runs in no time as long as their isn't any change with the music. The problem comes about when I try and sync with my laptop. I have the sync music option turned off and I always click merge info for my calendar and contacts (about 2000 entries for contacts). The sync with the laptop can sometimes take over 10 minutes and I can't figure out why as it only shows the sync in progress bar.
It's not like I'm changing much info, it's usually just the calendar so I can't figure out why it takes so long on a much newer computer.
Any info would be greatly welcomed.
Thanks,
Robert

One thing that might help out.
Create a new login account on the new computer.
Open address book and enter a test or real contact.
open itunes and go through the initial setup.
Connect the iphone and try syncing just contacts.
Allow the contacts to merge.
If this takes the same amount of time, then it is a system wide issue and you might need to reset isync.
If the sync only takes a short time like on the work computer, then it might be with the data or a program you have running in your user account when you login.
If you need to reset isync or sync services, here are a few articles that might help out.
One article is for osx 10.4.x and the other is for 10.5.x
http://support.apple.com/kb/HT1865
http://support.apple.com/kb/TS1628?viewlocale=en_US
http://support.apple.com/kb/TS1627?viewlocale=en_US
Make sure you use the correct article if you decide to reset sync services!!!!
Hope this helps.

E1200 speed issue - only when wifi download from internet

Hi,
I have a brand new E1200 router and I'm very disapointed with the speed I get.
The E1200 is connected to a Motorola SB6120 cable modem, connected to comcast.
I'm doing a couple of test using speedtest.net, and a couple of file transfers test between laptops on my network:
1) Laptop ethernet connected directly to the SB6120 modem. Speeds are around 34Mbps Down, 6Mbps Up which is what I expect.
2) Laptop ethernet connected to E1200, E1200 connected to SB6120. Speeds stays around the same (so far so good).
3) Laptop connected to E1200 through wifi. Thats when I get issue: Speed Down <1Mbps, Up is still around 6Mbps.
4) 1 Laptop, connected to E1200 through wifi, another laptop connected through ethernet. Transfer speeds about 48Mbps (thats about what I expect good). E1200 still connected to Modem.
5) 2 laptops connected to E1200 through wifi, transfer speed about 25Mbps (half of the previous test, sound about right too). E1200 still connected to Modem.
So basically:
- Wifi to Wifi : Good
- Wifi to Internal Ethernet: Good
- Internal Ethernet to External Internet: Good
- Wifi to External Internet: BAD
Before I return this router and try another one, what the h** is going on here ? I can understand bad wifi connection, but not in
this manner.
I should mention that I see a lot of extra ARP traffic coming from the modem and Comcast network, but that's a fairly low rate (~10Kbps) and not a problem when I'm doing ethernet to internet speed tests, so I dont think thats the problem.
Thanks.

Try to do the following steps:
A] With the help of Cisco Connect Software (if at all you have installed the router with the help of this software)
1] Open the software and go to the option which says "Router Settings"
2] Then click on the option which says "Advanced Settings" which will take you to the router's configuration page.
3] Lower the MTU (Maximum Transmission Unit) from 1500 to 1400 or less (usually found on your router's main/ basic setup page)
4] Then go to the Wireless tab, keep network mode as mixed,
For Channel Settings of 2.4 GHz you can make Channel Width to 20 MHz only and Channel to 6, 9, 11..
For Channel Settings of 5 GHz you can make Channel Width to 20 MHz only and Channel to 40 or 161...
B] If you haven't installed Cisco Connect then you can log on to the router's user interface using it's default IP address in the browser which is 192.168.1.1 and type in 'admin' as the password leaving the username field blank. This will take you to the router's web interface and then follow steps as mentioned above to make the changes.
Now check the connectivity status.

Slow transfer speeds between Mac Pro and Shared Drive on Windows Domain

Hi Guys,
Getting really slow transfer speeds when I try and transfer a file from a Mac Pro to a shared network drive on one of our Windows 2003 Servers.
The Mac Pro is logged on to windows domain. This data is transferring via our hard network, not via wireless. Not having any other transfer speed issues on any other PC's.
For example an 8mb file took around 45 mins.
Hope you can help. Many Thanks.

I saw this at a site where they were using DFS with Server 2003. When the few Mac's they had connected to the actual server and uploaded the file it was okay. But when it was sending the file via the \\DFS_node\share_name the Mac took heaps longer for the same file. Watching the Activity Monitor > Network monitor you could see gaps with the data transfer, as if there was some pausing between packets. A pcap showed that there was constant DNS requests coming from the Mac, even after the connection to the share was made. The same wasn't happening when the connection via SMB was directly to the actual file server. As there was only a few Mac on site they left it with the direct connection but were getting an MS specialist in to look at it. Never heard what happened with that one but you may want to try monitoring the packet transfer to see if the data movement is contstant or breaking. I'd also recommend getting Wireshark to monitor the transfer. You can compare upload to download and maybe even the transfer from the Mac to an MS workgroup share.

NSS2000 - Data transfer speeds over gigabit ethernet

I've just installed a NSS2000 on a gigabit network. I'm aware that some of the promised features (like support for jumbo frames) are not currently supported by the current firmware (version 1.13).
However, even without jumbo frames, I'm puzzled of why I am seeing data transfer speeds of only 50megabits per second, or about 5% utilization of the 1000Mb/s connection. I was expecting at least 20% utilization.
Is this another limitation of the current firmware version, or is there a setting somewhere on the NSS2000 which I need to to tweak to increase data transfer speeds?
More background - it is the only significant traffic on the network during test, the ethernet controller driver on my PC is the latest available, and the NSS reports that it is connected at 1000MB/sec. The unit has two 1.5Tb SATA drives in it, which are configuered as RAID1.
Also - does anyone know when the next firmware version is going to be available, and which of the current known issues it is likely to address?
thanks
Graham

I should mention that the volume I am writing to is encrypted - is the answer simply that this is the fastest that the onboard CPU can decrypt the content?
An experiment to an unencrypted volume increased the LAN utilization to around 10% - so an improvement, but still not as high as I had hoped.
thanks
Graham

What transfer speed can I expect via wired ethernet?

3 iMac's wired to an AirPort Extreme....what transfer speeds should I expect? I'm only getting 40-60MBps IMac to IMac via Ethernet provides up to 70MBps. I am wanting to get a Thunderbolt Drive but worry that while the iMac that the Thunderbolt HD is plugged into will get much faster transfer rates, when access the Thunderbolt HD from another iMac on the network I will still be stuck with the 40-60MBps rate. Surely there is a way to get faster network speeds than 40-60MBps?

Tesserax, You are are correct, I was just hoping that there was some way to get better performance out of my network speed so that the $1500 Thunderbolt purchase was worth it. What I now plan to do is get the $999 model R4 4-1TB just so I can have one since the iMac that the Thunderbolt HD will be plugged in to will be doing the most editing so in some ways it does help me....just not as much as I was hoping it would. I can at least take my old FireWire HD and plug it into my iMac and use that for FCPX projects that are for more personal than business use.
Having only 1 HD that 3 iMac's can use to edit images from has really helped me out with keeping everything in order.
If you can daisy chain the Thunderbolt Drives I have to wonder why they didn't have it so 2 iMac's couldn't connect to 1 HD. With 2 Thunderbolt ports on the iMac you would think you could connect iMacs together using 1 port on each then have the other port for like HD's, extra screens, etc You know what I mean? If you are going to make this super fast port/cable you might as well make it to connect iMacs as well.

Ethernet transfer speeds??

Hi, when transfer files between my iMac(early 2013) and my Mac mini(late 2012, running windows 7 in bootcamp) via my wired network, I'm only able to get speeds around 20-25MB/sec, thou I'm using a gigabit wired network, with D Link gigabit switch and cat 5e cable....
Could someone please guide me, what am I doing wrong, because I should be able to have transfer speeds around 125MB/sec(theoretically)
kindly
Jan

Just came across this, maybe I should wait for the new OSX maverick.......
"Network File Systems
OS X includes a broad set of network file services—SMB, AFP, and NFS—for sharing files between Mac and PC.
SMB2
SMB2 is the new default protocol for sharing files in OS X Mavericks. SMB2 is superfast, increases security, and improves Windows compatibility.
• Efficient. SMB2 features Resource compounding, allowing multiple requests to be sent in a single request. In addition, SMB2 can use large reads and writes to make better use of faster networks as well as large MTU support for blazing speeds on 10 Gigabit Ethernet. It aggressively caches file and folder properties and uses opportu- nistic locking to enable better caching of data. It’s even more reliable, thanks to the ability to transparently reconnect to servers in the event of a temporary disconnect.
• Secure. SMB2 supports Extended Authentication Security using Kerberos and NTLMv2.
• Compatible. SMB2 is automatically used to share files between two Mac computers running OS X Mavericks, or when a Windows client running Vista, Windows 7, or Windows 8 connects to your Mac. OS X Mavericks maintains support for AFP and SMB network file-sharing protocols, automatically selecting the appropriate protocol as needed."

Very slow network directory listing - but fast data transfer speed once listed?

Hello,
I have really tried to sort this myself before opening up to the community, however I have run out of ideas, and hope someone can offer the magic solution I have missed.
I am currently using the 3.4ghz i7 iMac on a 1GB LAN, running OSX10.7.2 - connecting to a Windows Server 2008 (Running Release 2) over ethernet.
If i go to a network directory that i haven't recently accessed it can take up to 60 seconds to show the contents of that directory. Once i have accessed that folder, if i come out of it and go back in it will be instant again - but the first time it lists the directory it looks like i have opened an empty folder - which after anything from 10seconds to 1 minute will suddenly show the files that are there.
Internet connectivity is fast through the network, and file transfers across the LAN are fast. (showing as approx 300mb per second) I can play and edit HD content across the network with no slowdown so I am confident that this issue is not related to the network speed itself, and is more to do with a setting on this mac.
Symptoms are very similar to this post: https://discussions.apple.com/message/12245148?messageID=12245148&amp%3b#1224514 8 - however i understand that in OSX Lion - SMB was removed - so i cannot find this file to edit.
I have tried bypassing additional hubs in the network by wiring direct cables to the switch that is connected to the file server, this made no difference.
I have also tried disconnecting the ethernet cable, and running over wifi. This fixes the listing problem, but when editing HD content over a network drive, this connection is not fast enough to carry the data without interruption (some projects are linked to up to 900gb of hd video content!)
Using ethernet, I have tried DHCP, DHCP with manual address, and manual mode. All reproduce this problem. i have tried using the windows workgroup, and tried without it.
I have also followed this suggestion: https://discussions.apple.com/thread/2134936?threadID=2134936&tstart=45 and used OpenDNS. this did not fix the issue.
For argument sake, I have also just tested a Macbook Pro running Snow Leopard to see if it was OS related. This reproduces the exact same problem, near instant directory listing on the wifi, a long and arduous wait on ethernet.
I cannot work out why directory listing is instant over wifi, but not over ethernet on 2 different macs, running 2 different versions of OSX. I also do not understand why if the network is having trouble listing the directories - the data transfer speed is 300mbps when i copy files across the wired network from the file server to the mac.
Does anyone have any other ideas as to what could be the problem here? We are about to start work on a very large project, where the content we are editing is spread out across around 200 different network folders (different shoots captured over the past 2 years). We really don't have the time to wait 60 seconds each time we need to access one of those directories to look for a file, and I am very close to pulling all my hair out!
I really look forward to hearing from anyone who can offer any insight.

If you are suspecting that the Windows update had something to do with your LAN going slow, then try the following:
1. Look for updates for your clients LAN NIC driver; or
2. Un-install the updates.

Internal Disk to Disk Data Transfer Speed Very Slow

I have a G5 Xserve running Tiger with all updates applied that has recently started experiencing very slow Drive to Drive Data transfer speeds.
When transferring data from one drive to another ( Internal to Internal, Internal to USB, Internal, Internal to FW, USB to USB or any other combination of the three ) we only are getting about 2GB / hr transfer speeds.
I initially thought the internal drive was going bad. I tested the drive and found some minor header issues etc... that were able to be repaired so I replace the internal boot drive
I tested and immediately got the same issue.
I also tried booting from a FW drive and I got the same issue.
If I connect to the server over the ethernet network, I get what I would expect to be typical data transfer rates of about 20GB+ / hr. Much higher than the internal rates and I am copying data from the same internal drives so I really don't think the drive is the issue.
I called AppleCare and discussed the issue with them. They said it sounded like a controller issue so I purchased a replacement MLB from them. After replacing the drive data transfer speeds jumped back to normal for about a day maybe two.
Now we are back to experiencing slow data transfer speeds internally ( 2GB / hr ) and normal transfer speeds ( 20GB+ / hr ) over the network.
Any ideas on what might be causing the problem would be appreciated

As suggested, do check for other I/O load on the spindles. And check for general system load.
I don't know of a good GUI in-built I/O monitor here (and particularly for Tiger Server), though there is iopending and DTrace and Apple-provided [performance scripts|http://support.apple.com/kb/HT1992] with Leopard and Leopard Server. top would show you busy processes.
Also look for memory errors and memory constraints and check for anything interesting in the contents of the system logs.
The next spot after the controllers (and it's usually my first "hardware" stop for these sorts of cases, and usually before swapping the motherboard) are the disks that are involved, and whatever widgets are in the PCI slots. Loose cables, bad cables, and spindle-swaps. Yes, disks can sometimes slow down like this, and that's not usually a Good Thing. I know you think this isn't the disks, but that's one of the remaining common hardware factors. And don't presume any SMART disk monitoring has predictive value; SMART can miss a number of these cases.
(Sometimes you have to use the classic "field service" technique of swapping parts and of shutting down software pieces until the problem goes away. Then work from there.)
And the other question is around how much time and effort should be spent on this Xserve G5 box; whether you're now in the market for a replacement G5 box or a newer Intel Xserve box as a more cost-effective solution.
(How current and how reliable is your disk archive?)

Wireless transfer speed is hopeless!

Hi,
New BT customer here, after being with aol for nearly 10 years I thought it was time for a change. Why-o-why?
I used to have a netgear 834g router which worked fine, signal would drop a touch upstairs and broadband 8mb with aol, but they could not offer me an all-in package, Wireless transfer speed of 54mbps with a netgear wv111v2 g adapter.
So I decided to change to BT(07/06/2010) to have it all under one roof, Total Broadband they call it, Total **** I call it.
Since the changeover my wireless transfer speed upstairs will be lucky to achieve 24mbps and the signal is shocking ranges from low to can't be bothered. So, I bought a new Belkin 'N' F5D8053v6 adapter to achieve best range and speed. No change in fact, it is worse than the old adapter, Dodgy adapter maybe? No, because I then bought the singing n' dancing Netgear N 300 mbps Wn111v2 adapter and it is still rubbish 24mbps max.
I am not a computer nerd, but I can set up a network after going through all this before, having two kids who are computer nuts sees to that.
I have changed/reinstalled everything, changed the channels; WEP, WPA-Sk; refitted old adapter, sat on top the BT hub; scoured forums, all to no avail the signal and transfer rate is still the same.
Off to India it was, to have the mis-fortune of speaking to one of the most rude, abrasive customer service personel. They would not listen to what I told them, accused me of entering the wrong password; ignored me on the phone whilst talking to someone else, done some checks remotely whilst I was still on line and said the speed was the best I could achieve, after an endless amount of time on the phone, It was the brick wall with open doorway between me and the hub 5 yards away causing the drop. All non believable.
Well I have just come off the phone and it's still the same, I have had to change the channels 5 times since to try and get a constant signal.
The BT hub say tranfer rate of 130mbps when I only have 24mbps according to my adapter, so who is lying?
My line is fine, I live less than 2 miles form exchange and if I connect through ethernet I get 6.5mb, wireless it drops to 2.5mb upload 0.4mb.
Please BT come and take this useless equipment away and I will go back to aol's basic kit. I won't hold it against you, but it is far superior in every way.

herbie9 your own post said that and I quote "I used to have a netgear 834g router which worked fine, signal would drop a touch upstairs and broadband 8mb with aol, but they could not offer me an all-in package, Wireless transfer speed of 54mbps with a netgear wv111v2 g adapter." Like Sweeney47 says use that and just configure it for BT access. Plenty of links in here to help with that. The only other answer for you will be to use a powerline adpater pair to another WAP upstairs and that will give you the signal downstairs and up. should be able to pick up a cheap WAP for under £20 and the powerline adpaters vary but I have seen them for £30 and up. Quality counts on the powerline though. Must be an enviromental issue regards wireless signal.

File transfer speed in 10.5.2

Since installing 10.5.2 the transfer speed between two Macs sharing a wireless access point is abysmal. 1GB now takes 8 hours to transfer if copied through the Finder. It used to take about half an hour. Using rsync from the command line the same transfer still takes about half an hour, with no Speedup. This looks like a protocol issue rather than anything to do with the wireless setup.
Anyone getting the same problem?

Yeah. The same wireless network setups work fine with machines not yet brought up to 10.5.2. The problem has been seen both with 3rd party wireless routers and with Apple Airport Extreme. There's some indication the problem can even be triggered in wired ethernet transfers outbound from a 10.5.2 MAC if the file sizes are big enough and time duration of the transfer is long enough.
The two threads (cited above) pretty much cover what seems to be known about the problem from posters here. There's speculation that this is an instance of "silly windows" syndrome (see the threads). At least one bug report has been filed already (no word of any response yet). Here are the two threads again for convenience:
Slow upload into the internet from a wireless 10.5.2 MAC:
http://discussions.apple.com/thread.jspa?threadID=1389943
Slow file transfers within the LAN outbound from a wireless 10.5.2 MAC:
http://discussions.apple.com/thread.jspa?threadID=1394485
--Bob

Network transfer speeds

Hi Guys,
I've got a wired ethernet network set up here at home.
I'm using an Airport extreme which is connected directly to my modem.
From there, I have the Airport connected to a brand new Gigabit switch.
All my devices: 2 imacs, 2 apple tv's, a d-link Gigabit NAS.
For some reason, I can't get transfer speeds over 41.3 MB/sec
I've tried this on all devices. Reset everything.
Is this speed typical of Gigabit? I thought it would be much much faster.
Not sure how to diagnose the issue. Screen shot of network activity below....
Any suggestions?
Cheers,
Nick

We had a similar issue and the issue was the LRO settings in esxi
http://billyc5022.blogspot.com/2011/09/vmware-esxi-41-optimizations-for-cisco.html
Sent from Cisco Technical Support iPad App

Ethernet intranet transfer speed issue

Similar Messages

Maybe you are looking for