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USB Hub or Switch ?

rglee
05-07-2009, 12:39 PM
Thanks for all the useful info in this forum. I have a question that I haven't seen posted before.

I have 3 750 GB WD external hard drives which I connect to a 622 DVR. I am tired of manually swapping these drives. Is there any way I can have all drives connected and switch them?

USB switches connect multiple computers to a single device, while USB hubs connect multiple devices to a single computer. Seems like I need a hub with switching capability.

BTW, if you have an old unused wireless router, you do not need to buy a $70 ethernet bridge/adapter to connect your DVR to your home network. You can download new microcode for that old router that will add bridging capability. Search for dd-wrt.

jim5506
05-08-2009, 02:14 PM
Only one drive can be powered up at a time. You can hae all three on a USB hub but only one powered up or put them on a switch and swap them around.

The switch may confuse the OS on the receiver, because it will need to re-read the directory and files when you switch from one drive to another, some sort of pause must be initiated so the receiver will release the first drive and go to the second, because it can only see one EHD at time.

I use a SATA dock for my external hard drives. When I turn one off the receiver prompts me to acknowledge that a drive has been disconnected and when I turn the second on it prompts me to acknowledge the addition of the new drive. I believe the OS needs to go through this proceedure to properly read the drives, but I could be wrong.

patmurphey
05-09-2009, 08:47 AM
I use a SATA dock for my external hard drives. When I turn one off the receiver prompts me to acknowledge that a drive has been disconnected and when I turn the second on it prompts me to acknowledge the addition of the new drive. I believe the OS needs to go through this proceedure to properly read the drives, but I could be wrong.

I use a USB switch and the receiver response to the changeover is exactly the same. I leave all of the drives powered, the switch takes care of activating them when selected. Simple and inexpensive and no hassle with power if you have drives that don't have power switches. :D

New Jersey
08-18-2009, 11:24 PM
I use a USB switch and the receiver response to the changeover is exactly the same. I leave all of the drives powered, the switch takes care of activating them when selected. Simple and inexpensive and no hassle with power if you have drives that don't have power switches. :D

Pat,

What type of switch are you using?

patmurphey
08-19-2009, 12:14 PM
Pat,

What type of switch are you using?

The 4 port version of this:

http://www.cyberguys.com/product-details/?productid=2375

You will also need to evauate what AB/male/female adapters that you might need to fit your drives:

http://www.cyberguys.com/product-listings/?categoryid=104


Pat

New Jersey
08-19-2009, 09:12 PM
Yes! That is just what I've been looking for. 4x1.5 terabyte drives. So, basically any manual 4:1 switch will work?

stinkfist69
08-19-2009, 11:26 PM
Yes! That is just what I've been looking for. 4x1.5 terabyte drives. So, basically any manual 4:1 switch will work?

No not every switch will work. I bought these... did not work. I just ordered one of the 4:1 manual switch that he posted I hope it works.:D


http://cgi.ebay.com/2-Port-USB-2-0-Auto-Sharing-Printer-Scanner-Switch-Hub_W0QQitemZ170345623998QQcmdZViewItemQQptZPCA_Ca bles_Adapters?hash=item27a963f1be&_trksid=p3286.c0.m14

http://cgi.ebay.com/Printer-Scanner-Sharing-Switch-Hub-4-PC-to-1-USB-Device_W0QQitemZ370210090528QQcmdZViewItemQQptZPCA _Cables_Adapters?hash=item56323dae20&_trksid=p3286.c0.m14

New Jersey
08-20-2009, 01:49 AM
Let me know how that goes! I'd be interested to find out what kind of transfer speeds you get if it does work.

stinkfist69
08-30-2009, 01:37 PM
Let me know how that goes! I'd be interested to find out what kind of transfer speeds you get if it does work.


Just wanted to let you know I got the USB switch and it did not work. So now I have three that won't work. I gave up I am just going to unplug each usb hard drive each time I need to switch. So I don't know how people get them to work.

http://www.nwca.com/product.asp?pf_id=US-41305

patmurphey
09-01-2009, 09:34 AM
Just wanted to let you know I got the USB switch and it did not work. So now I have three that won't work. I gave up I am just going to unplug each usb hard drive each time I need to switch. So I don't know how people get them to work.

http://www.nwca.com/product.asp?pf_id=US-41305

My USB switch has been trouble free since installation. When using the adapters, did you keep the basic cable direction from 622 to drives consistent? I can't think of any other possible problem. The switches are a simple mechanical connection.

Edit: I see from your link that the switch you have didn't need adapters.