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D-Link Hi-Speed USB 2.0 7-Port Powered Hub (DUB-H7)

D-Link Hi-Speed USB 2.0 7-Port Powered Hub (DUB-H7)

(861 customer reviews)

List Price:	$39.99
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SKU:

790069252419-DUB-H7

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Description:

The D-Link DUB-H7 2.0 is a Hi-Speed USB 2.0 7-port hub that is backward compatible with USB 1.0 and 1.1. It provides an out of the box industry standard that allows connection of up to seven USB peripherals or devices to your USB ready PC or Mac. The D-Link DUB-H7 is targeted at PC and Mac users that are expanding the number of USB ports on their system. The USB fast charging port allows you to quickly charge your iPad, iPhone, tablet, or other power hungry mobile devices.

Features:

•

Compact design ideal for travel

•

Up to 40x Faster than USB 1.1 (1); up to 480Mbps

•

7 downstream Ports to Connect More Devices to Your Computer

•

Works with USB 1.x Devices

•

Convenient Plug and Play Installation

Product Details:

Product Length:	2.44 inches
Product Width:	4.03 inches
Product Height:	1.09 inches
Product Weight:	0.19 pounds
Package Length:	8.5 inches
Package Width:	6.9 inches
Package Height:	4.0 inches
Package Weight:	0.85 pounds
Average Customer Rating:	based on 861 reviews

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Customer Reviews:

Average Customer Review: 4.0

( 861 customer reviews )
Write an online review and share your thoughts with other customers.

Most Helpful Customer Reviews

434 of 458 found the following review helpful:

This item is getting something of an undeserved rap here...Jul 03, 2005
By Joel Kolstad "Zimbo"
*** Note: Several recent comments have stated that this product no longer comes with a worldwide voltage input (100-240V) power supply. That's a shame, and I'd definitely knock a star off the review if I could due to this change on D-Link's part -- I can only imagine it was part of a cost-cutting move. :-(

(Note that this review was originally posted in 2005, so it's been a LIFETIME for an electronic device and the DUB-H7's you buy today are likely quite dissimilar insofar as their physical construction goes compared to the ones from 2005.)

Original review:

I've had one for about six months now, and it's worked without problems. One of the things I particularly like with it is that it comes with one of the newer "slimline" power supplies that doesn't block other plugs, works anywhere in the world (100-240V), and is more efficient than the old "wall wart" power supplies.

Let me address some of the other comments here:

1) For the guy with the Lexar data card... it is a blight on D-Link's reputation that their technical support was clearly incompetent (this is sadly true of many companies today -- being pushed there in part by the relentless "drive to the bottom" by consumers who often care more about price than quality and support), but I doubt that even a really good company could have helped much. Although the hub may have somehow been at fault, it's also possible the Lexar card had problems -- even if it worked fine in other hubs. For the record, I've used a handful of USB drives with this hub without problems... although not a Lexar brand.

2) Regaridng plugging in a USB 1.0/1.1 device and slowing the hub down -- this doesn't actually happen, at least in the hub I received, but what D-Link is doing is hedging their bets (hence the word "may" -- which unfortunately these days many manufacturers use when the word "will" is more correct!): Inside the hub you'll find a VERY generic hub IC (actually, two of them), and D-Link has a lot of freedom to use different vendors' ICs based on price, availability, etc. All of them are USB 2.0 hubs, but ones without so-called "per port transaction translators" will drop to full speed (12Mbps) if any of the ports have such a device plugged into them. Happily, ICs like this are pretty much extinct today (when USB 2.0 first came out they were around). In any case, your solution of just getting two hubs certainly still applies. I agree this should be a little bit more prominently advertised, but so should a lot of things about USB, WiFi, etc. -- the oft-touted data routes of 480Mbps and 54Mbps (respectively) are pure fantasy, for instance, in real world applications.

227 of 238 found the following review helpful:

Two features worth notingJul 27, 2004
By N. Caine
I think the other reviews largely get it right. Two things I haven't seen in them, however: first, the plug on the power cord is in the shape of a wide black monolith, so, like bulky a/c adaptors... Second, the included documentation says that the hub will revert to a USB 1.1 hub FOR ALL DEVICES if you have any USB 1 device connected. It says that to get USB 2.0 throughput, you must disconnect all USB 1.0 or 1.1 devices from the hub first. That's worth knowing.

Finally, if you buy the hub, I suggest going to Windows Update and downloading the optional USB 2.0 fix for WinXP SP 1.

159 of 166 found the following review helpful:

Good product, but laptop users bewareJan 17, 2004

I bought this product to work with my Dell Inspiron laptop running WinXP Pro. So far it works great with my wireless mouse, keyboard, and digital camera plugged in simultaneously. The AC power ensures that your USB-powered devices will work properly. However, there is one issue to be aware of: this hub only works when plugged into AC power, which was not clearly indicated in the specs. For this reason, it is not a good hub for laptop users on the go, which is why I give it only 4 stars. Other than that, it is a solid performer. It is small, so it doesn't clutter your desktop too much, and has rubber feet to keep it from sliding. The AC adapter is sideways so that it only takes up one plug, which is a nice detail. This would be a good choice if you are planning to use it for a desktop, particularly if you have several USB-powered devices.

72 of 76 found the following review helpful:

Great USB Hub; Works without A/C Power for MeMar 23, 2005
By John Nolley II
I originally purchased this hub to make it easier to use multiple USB devices with my laptop while using it at my desk at home. My printer, mouse, barcode scanner, and thumb drive are all USB devices, and pulling the laptop out to unplug one and attach another was getting rather old.

It's a smallish hub, but not one so tiny that the ports are so crammed together so as to be nearly useless. At 4 inches wide and less than an inch tall, the hub should easily fit on any desk, and the rubber feet help hold it in place. The ports are widely enough spaced that you shouldn't have a problem attaching cords, thumb drives, or other USB devices.

Since I planned to use it only at my desk anyway, the caveat that an A/C adapter is required didn't bother me--but I've found that the hub works fine without any A/C power at all, and despite the instructions claiming it doesn't draw power from the USB bus, the power LED lights up, and all devices work fine. Without the A/C adapter in use, the hub also runs quite cool and doesn't suffer from the lock-up problems others have mentioned.

If you plan on using mostly powered USB devices--like printers, external hard drives or CD/DVD drives--you should be fine using the hub "unpowered." Using it for a keyboard, mouse, barcode reader, and thumb drive may require the use of the A/C power for reliable operation. And if you're worried about putting too much of a power strain on your laptop's USB bus, connect it via a docking station (as I do) or use the A/C adapter. Still, with that said, many people should be able to use it just fine without having to add another bulky "leech" to their power strips.

Finally, the manual does state that the use of both USB 1 and 2 devices at the same time may cause the hub to drop into USB 1-only mode. I stress "may," as so far the tests I've run with older devices in combination with a USB 2.0 CD burner have worked fine at USB 2 speeds--I assume then the compatibility depends largely on the actual devices used.

58 of 61 found the following review helpful:

Partial workarounds in a nutshell for USB 3.0 hub/disk disconnection problems on Windows 7Mar 02, 2012
By testmaster
This is a note that applies to all USB 3.0 hubs.

After 1.5 years of having USB 3.0 random disconnections to my WD external USB 3.0 drive (with or without a hub) on Windows 7,
I recently did research and experiments again to mostly solve these random USB 3.0 drive disconnections and random hangs during shutdown/startup,
also affecting a new laptop.

After applying items 1 and 2 below, these random disconnections are much more rare and so also are my related shutdown/restart hangs
(and if a hang occurs I know to do item 3 and the hang will be over for my system).

==============================================================================================================
Partial workarounds in a nutshell for all USB 3.0 hub/disk disconnection problems on Windows 7:

1) Do one time (each USB 3.0 disk): Ensure the USB 3.0 disk properties Policies has "Quick removal" selected for each USB 3.0 disk
(not "Better performance" which uses a Windows cache -- a bad idea if USB 3.0 disconnects at random).

2) Do one time (each year): Ensure the USB 3.0 Controller driver is up-to-date
(hint: don't ask Windows to find the latest driver for download -- it often won't -- instead ask google).

3) If Windows hangs on shutdown or startup, try this first to rule out USB 3.0 problems:
unplug some USB 3.0 cable from the disk along the path to the PC, wait until the system is fully up again, then plugin the cable.
To be proactive and prevent such a hang due to USB 3.0 being confused over what is connected,
make sure My Computer (ie. explorer) shows the USB 3.0 disk is connected before you do a shutdown/restart.

4) If at any time the USB 3.0 disk does not show as connected,
unplug some USB 3.0 cable from the disk along the path to the PC, wait 5 seconds, then plugin the cable.

==============================================================================================================
Potential workarounds that had no effect on Windows 7:

No effect: Setting in Control Panel->Power Options the USB Settings for your current power scheme to set "USB selective suspend setting" to Disabled seems to be a good idea, but appears to have no effect on the USB 3.0 disconnection problems.

No effect: disabled from Startup on my older laptop the process nusb3mon.exe (which does not exist on the newer laptop).

No effect: Microsoft workaround to add ForceHCResetOnResume to all USB Host Controller classes (using regedit):
google: One possible solution for the hub just disappearing

==============================================================================================================

Details for effective workarounds 1 and 2:

#1) HowTo: Ensure the USB 3.0 disk properties has "Quick removal" selected for each USB 3.0 disk

To avoid/reduce random disconnection of an external USB 3.0 drive connected to any USB 3.0 hub it seems important to make sure that the external drive properties is set to "Quick removal (default)" rather than "Better performance". Disabling the Windows 7 USB 3.0 write cache seems important for reliable connections and non-hangs on shutdown/restart, not to mention loss of data in some circumstances. To check or set this, do this:
-- Goto Control Panel->[System and Security->]Administrative Tools->Computer Management->Device Manager
-- Click Disk drives
-- Rclick "WD My Passport ... USB Device"->Properties (or whatever your external USB 3.0 drive is called)
-- Click tab Policies
-- If you see "Better performance" selected, then you should change this to "Quick removal (default)" to get more reliable USB 3.0 connections, thus turning off the Windows 7 write cache.

#2) HowTo: Ensure the USB 3.0 Controller driver is up-to-date

(Updating the driver solved one laptop's problem of the USB 3.0 drive always being disconnected after waking from a sleep/hibernate).

-- Goto Control Panel->[System and Security->]Administrative Tools->Computer Management->Device Manager
-- Click Universal Serial Bus controllers
-- For each USB 3.0 Controller (probably only will be one) -- look for all names that match ...USB...3...Controller...
-- Rlick on that controller name, then click Properties
-- Click tab Driver
-- Find the "Driver version" number which we'll refer to as DRVVER (eg. 1.0.19.0 or 3.0.226.3)
-- Also find the driver name (we'll refer to as DRVNAM) which is at the top of that Driver tab
(eg. "NEC Electronics USB 3.0 Host Controller" or "Fresco Logic xHCI(USB3) Controller FL1000 Series")
-- Do _not_ click Update Driver unless this is an Intel driver, since other brand drivers will probably not be found this way
(Windows cannot find updates for most non-Intel brand drivers, and its "no updates available" message is misleading)
-- Now google for DRVNAM (without the quotes) followed by "driver update" or "driver download"
(eg. google: NEC Electronics USB 3.0 Host Controller driver download)
-- Now be careful: only download and install (then reboot) a driver version greater than DRVVER (your current version)
and which exactly matches your driver name DRVNAM. When you verify your driver version is the latest, you are done.

==============================================================================================================

Update: I paid for the Driver Reviver software (rated as one of the very best) to update *all* the dozens of drivers on my PC, including everything to do with USB 3.0. I have not had a single problem since then (about 6 months ago). Before updating my USB 3.0 drivers, it was a nightmare of lost connections for both of my different brand Win 7 PCs, no matter what hub I used. Note that the I had to run the Driver Reviver program 3 times, since it didn't succeed in updating all the USB 3.0 drivers the first or second time (I had a USB 3.0 disk plugged in). After choosing normal (not "recover" which would be a huge waste of time) boot each time after it hung on bootup twice, the third time was a charm. I highly recommend Driver Reviver if: 1) you are brave 2) your system is fully backed up. It sure saves time in trying to find drivers on the web and updating each one related to USB 3.0.

I claim that all USB 3.0 hubs nowadays work equally well, assuming that all your USB 3.0 drivers are up-to-date and that the hub has sufficient power for the number of connections you have plugged into it and that it is manufactured well enough so that the cords fit into and stay in the hub. The DC power provided and the fit of the cords into the USB 3.0 hub are all you need to consider (if you are willing to update all your USB 3.0 drivers).

See all 861 customer reviews on Amazon.com

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