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The problem with the external 2.5 HD enclosures


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#1
JimB007

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For some reason my OS and special tools like GetData back never seem to recognize an enclosures with an USB connection where you put a 2.5" HD yourself in it.

The HD simply isn't there. Like I said over time I tried 3 different HD's and 3 different external enclosures to put the small HD's in.

Only in one time there was something wrong with the OS of the HD placed in an enclosure, but my XP still should have recognized it as "slave".

I also tried different "jumper" settings on the back of the HD. Nothing works.

Can someone confirm me the following: It seems that those combinations enclosures/HD only are recognised by the OS in case the HD is of the very old type. The newer HD's of the last 5 years seem to need a "pulse" come from the OS, to be recognised by it. The electronic in most of these external HD enclosures is not adapted to this. At least that's what I heard of a technician.

Now I am talking about empty enclosures where you put an 2.5"HD of your choice in. The enclosures that are sold with a built in HD are working and being recognised by the OS. Maybe because the electronics in it are adapted; which is perhaps not the case with the other enclosures. So if people put "old" HD's in it they will work.

Edited by JimB007, 10 February 2007 - 01:44 PM.

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#2
austin_o

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I don't have personal experience wth 2.5" enclosures but I do have 4 USB 3.5 " enclosures. The have worked with what ever drive I choose to put in them. They do require the drive jumpers to be set to master. I never did have much luck with getting WXP Pro to "recognize" the drive as plug and play, although the drive enclosure manufacturers all claim it is plug and play. I found it best to set the drive as slave, install it inside a computer, format the drive, then take it out, set it to master and put it inside of the enclosure. This has always worked for me.
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#3
JimB007

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I don't have personal experience wth 2.5" enclosures but I do have 4 USB 3.5 " enclosures. The have worked with what ever drive I choose to put in them. They do require the drive jumpers to be set to master. I never did have much luck with getting WXP Pro to "recognize" the drive as plug and play, although the drive enclosure manufacturers all claim it is plug and play. I found it best to set the drive as slave, install it inside a computer, format the drive, then take it out, set it to master and put it inside of the enclosure. This has always worked for me.

I have 6 external drives 3.5" HD's that were prefitted with an HD in them. Except for 2 of them from a few years ago they all have no problem being recognised by the OS. As far as the plug and playability of the one's were you put a HD of your choice in it I have no idea. BTW these days a prefitted enclosure is cheaper.

Anyway I never managed to make a combination of enclosure + 2.5" HD being recognised by the OS. And as I said I tried 3 different enclosures and 3 diffrent HD's.
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#4
SRX660

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I think the problem is that on 2.5 usb drives they try using the USB port for power. Years ago i bought a cheap USB external drive kit for a 5 gig toshiba extra drive i had. This enclosure worked very well on Win 98( with drivers), Win ME, and Win XP.

So i decided to do the same thing with a recently acquired 40 Gig 2.5 drive. I bought an USB 2.0 enclosure hooked the drive up and the first time could see the drive. After the first time i could no longer see the drive and was not able to get it to work. Tried it with another borrowed 80 G 2.5 drive and it does not work.

So, i went out and bought a retail Bytecc 2.5 external enclosure and it still does not work with any drive either. I have since found that with a inline meter that the newer 2.5 drives pull more watts than even a duoble USB connection can pull. A single USB port can have over 2.5 watts of available power. With a double connection to 2 usb ports you should have at least 5 Watts. My meter was bouncing up to 7 Watts when i was trying to connect the 2.5 drive to the usb ports. So i really think this is the problem.

I am working on rigging a 10 watt power adapter from a old printer to see if it cures the problem.

I too have 2 USB external self powered 3.5 drives that have worked perfectly for a couple of years here.

SRX660
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#5
JimB007

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Ye these 2.5" enclosures all come with this double USB connectors. And if that's not enough it could be the reason. Anyway my enclosure comes with a tiny power connector. I could try to connect 4 rechargeable batteries (1.2V) with a small connector (4x1.2V=4.8). If this works out fine I could look for a small regulated power supply; because there is danger since most of them produce a higher voltage if not connected to a load.

Edited by JimB007, 11 February 2007 - 11:17 PM.

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#6
JimB007

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I am working on rigging a 10 watt power adapter from a old printer to see if it cures the problem.

I too have 2 USB external self powered 3.5 drives that have worked perfectly for a couple of years here.

SRX660

Here's an update on this problem with the 2.5" inch HD's in an external do it yourself box.
Allow me to say immediately that your 10W/5V DC (or 2 Amps) won't solve the problem. Here's why: As I said my box has a power connection 5V=.
I just bought a BELKIN PCMCIA Cardbus 2.0 USB. There was a power supply that came with it. It has a rating of 3A. That's good for 15W. It had the same polarity and the same connector fitted in my 2.5" box. Without connecting the box to my PC I connected the power to the box and heard my HD spinning. I connected the box to an USB port and nothing happened. My OS still did not recognize the HD. It was still not among the hardware list even if I made my OS search automatically for new connected hardware. So I still think that the HD needs some kind of pulse coming from the OS; like a technician told me.
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#7
StaticRed

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i have a 2.5" hard drive that i took out of my laptop, it wouldn't boot any more.. but i had all my stuff on it..

so i bought a wee cheapy usb housing of ebay.. came with a double usb lead. any way i used just one of the usb leads.. plugged it in and windows found it straight away.. i have it plugged in now and i can access it no problems.. and i am now using it as an extra hard drive.. so it works ok for me.

forgot to say im running.. xp pro. service pack 2

Edited by StaticRed, 13 February 2007 - 02:26 PM.

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#8
JimB007

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i have a 2.5" hard drive that i took out of my laptop, it wouldn't boot any more.. but i had all my stuff on it..

so i bought a wee cheapy usb housing of ebay.. came with a double usb lead. any way i used just one of the usb leads.. plugged it in and windows found it straight away.. i have it plugged in now and i can access it no problems.. and i am now using it as an extra hard drive.. so it works ok for me.

forgot to say im running.. xp pro. service pack 2

Well that's a miracle, because like I said somewhere in my previous posts; I've tried over the last 1/2 year or so different combinations of HD's and cases. Nothing never ever worked, even though the hard drives sometimes worked perfectly (only one didn't boot like in your case)

So here's some important questions from me to you

1) The HD you mentioned was it an "old" one ? (like I said the newer HD's of the last 4 years; according to specialists need a pulse from the PC's OS - also the old one's need less power)
2) How did you "set" the jumpers (I've tried also every possible setting)
3) The name of that "special" external hard case that works. Because it is also possible of course that some hardcase drives have some "overriding" that avoids the need for a pulse from the PC's OS. I mean they could be fitted with a newer and better electronics - cheap or not cheap cases.
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#9
StaticRed

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to your questions..

the hard drive is a Toshiba MK3017GAP 30GB,

writtin on it is.. DC+5V - 0.7A

I bought it brand new 3 years ago.

as for the jumpers. i never touched them.. i have 2 hard drives in the pc.. one master and one slave.. i changed no jumpers on the pc hard drives or the laptop one. i just put it in the housing and connected it to the pc and windows found new hardware. started auto play.. i hit cancel casue it was reading everything on the hard drive.. i went to my computer and its there. i had it partitions on the laptop and i can still access both partitions. when connected t the pc.

and for the housing.. im not advertising.. but this is the excat one i have http://cgi.ebay.co.u...1QQcmdZViewItem

its usb 2.0

its unbranded.. just plain silver with usb 2.0 on it

Edited by StaticRed, 14 February 2007 - 06:52 AM.

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#10
JimB007

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Well I'm convinced certainly because your HD is a newer type with higher power need than mine anyway. Mine is only 0.55A. I'm gonna return the one I have anyway since I can't use it. See if I can get a working one with more recent electronics in it 'cse that's the problem I guess..
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