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Thread ID: 76035 2007-01-18 07:44:00 DSE 2.5 HDD Enclosure mustang14a (11787) Press F1
Post ID Timestamp Content User
517286 2007-01-18 07:44:00 I reccomend this product to everyone it is really great! Comes with carry case and USB cable. mustang14a (11787)
517287 2007-01-18 07:49:00 Aren't most hdd's 3.5?

In which case they wouldn't fit in that enclosure?
Speedy Gonzales (78)
517288 2007-01-18 07:52:00 2.5 inch HDD is a laptop HDD. mustang14a (11787)
517289 2007-01-18 08:05:00 Thats what I thought.

I would say most people would have 3.5 / desktops not laptops.
Speedy Gonzales (78)
517290 2007-01-18 08:48:00 You should only but 2.5" USB cases that have provision for an external power pack, have encountered too many where the +5v power needs of the drive just overload the two USB ports on the PC. godfather (25)
517291 2007-01-19 03:05:00 There are good reasons fro the 2.5" cases: size and power supply.

Most (all?) laptop 2.5" drives need only a 5V supply. Almost all 3.5" ones need 12V as well, which USB doesn't supply. ;)

Whether all USB ports can supply the rated 500 mA, and whether all 2.5" drives require less than 500 mA is an exercise left for the student. :D
Graham L (2)
517292 2007-01-19 03:34:00 There are good reasons fro the 2.5" cases: size and power supply.

Most (all?) laptop 2.5" drives need only a 5V supply. Almost all 3.5" ones need 12V as well, which USB doesn't supply. ;)

Whether all USB ports can supply the rated 500 mA, and whether all 2.5" drives require less than 500 mA is an exercise left for the student. :D Exactly, physical size though ;)

AFAIK that is correct

I have a 2.5" 40GB portable drive here and that is rated at 5VDC 1.2A... I know that a lot of PCs error when I plug it in saying the USB port is drawing too much current, and often the drive dies because the power supply from the USB is too little.

Reasons why 3.5" portable drives are better:

1. More data capacity possibility

2. External power source means there is no stress on the USB ports

3. Transfer of large amounts of data is faster

Just my :2cents:
The_End_Of_Reality (334)
517293 2007-01-19 03:42:00 Just wondering how there are external usb and firewire. Is it possible for a drive to be connected externally .. that runs on the motherboard (onboard). Like, connecting a wire from one of the onboard pins to a port behind the computer and then plug that to the drive by wire. Have the drive powered up by its own PSU, should be quicker than USB2 or Firewire? If at all possible.

Maybe it can be daisy chained like P-ATA and SATA ....
Nomad (952)
517294 2007-01-19 04:03:00 Just wondering how there are external usb and firewire. Is it possible for a drive to be connected externally .. that runs on the motherboard (onboard). Like, connecting a wire from one of the onboard pins to a port behind the computer and then plug that to the drive by wire. Have the drive powered up by its own PSU, should be quicker than USB2 or Firewire? If at all possible.

Maybe it can be daisy chained like P-ATA and SATA .... Yes, e-SATA (external SATA) runs at the speed that the HDD and mobo can handle eg 3Gbps HDD and a 3Gbps mobo, it will run at these speeds

EDIT: also has its own external PSU, also be best to use a case for cooling...
The_End_Of_Reality (334)
517295 2007-01-19 05:18:00 Its possible to get I/O brackets that provide a 4 pin molex power connector and standard SATA port externally on the back on the case. Its not a special standard or anything merely shifts the port from the motherboard to the back of the case. I think a few Gigabyte motherboards use to come with these as part of their bundle. Pete O'Neil (6584)
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