Question about EMC CLARiiON AX150 (AXS207500KIT) Network Storage Server

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Slow file transfer

Users complaining of very slow file transfers from SAN. Server is Dell dual-core, dual proc Xeon with 4GB RAM, running Server 2003 SP2. Downloading a 500 MB file can take hours.

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Re: slow file transfer

What is your connectivity to the SAN? fiber or iSCSI? Have you checked the management tools to see if there are any errors on the data paths? If using iSCSI and the SAN and server are in the same network segment, make sure the default gateway is empty for the iSCSI connection. Look at the routes on the server to make sure the traffic is not leaving the subnet through a router and back to the SAN, and vice versa. If fiber then you'll have to use the tools given to check for errors. Ken

Posted on Aug 15, 2007

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Nss4000 with home computer quad core 2.4mghz 8 g ram. all rj45 connections are gigabit transfer speed between computer and nas is 11MB/s what should the tfr speed be? Should I be using cat 6...

Your speed is going to be limited by your slowest component. Most cables you buy in a store are really cat 5e which will do 1000Mbps. If your getting 11MBps (~100Mbps) then something in your network is running at 100Mbps. Assuming your going from Computer -> Router -> Nas
Computer needs a 1Gbps NIC in it, you need at least a cat 5e cable to router, router needs to support 1Gbps bandwidth, cable from router to nas needs to be at least cat 5e and your nic on nas needs to support 1Gbps as well.
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Write and read spead slow; only 10MB/s

This has been a commonly reported concern. Here are a few links that may provide a solution to this problem:
Additionally, some Vista users report better file transfer rates using WinRAR & Teracopy.
For maximum file transfer, also check all elements in your network, i.e. switches & routers, etc. For discussion of max speeds cf. here

Please consult this article from Microsoft to take steps to improve your system's performance with Vista, by clicking here
For troubleshooting performance issues, please see these articles and the links within them: TroubleshootVistaPerformance and Troubleshoot Vista Startup and Vista Diagnostics
Finally, you may wish to consult this General Setup&Maintenance guide.

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
If I've managed to answer your question or solve a problem, please take a moment to kindly rate this post....thanks!

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Need Infrastructure Hint

If you need to store this data for several years, it's going to be a huge machine.

I solved a similar issue by using a standard PC and fill it with disks, and then run Freenas on it. It's BSD based, gives you NFS, SMB/CIFS, iSCSI, FTP, HTTP/WebDAV, Apple, ... connectivity in an open source package, ready to go, easy to manage. it supports doing software Raid 5 with a bunch of disks, so stable and secure. I even lost a disk last week, and replaced it with another one. After 2h the system was 'OK' again...

If you really need huge storage capacity, go for a 'standard' storage server (supermicro for instance) that can store 24 or more disks... You have them in several brands, and the SuperMicro ones aren't that expensive.

Put in a bunch of inexpensive disks (500GB SATA-II disks are really affordable these days) and create a RAID5 array out of all these...

If you want to be even more secure, go with hardware Raid controllers. We use 3Ware/AMCC controllers all the time.

If you got the money, Sun just released a couple of 'Storage Servers' in their 7000 series... Go check them out...

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