Ah, now I understand completely. Let's get started.
The first thing to note when trying to fix a USB hard drive is whether it was pre-assembled or if you/a friend assembled it. Pre-assembled drives are generally less troublesome. If they do not work, these are the reasons, generally:
- A defective or damaged drive/cable.
- A problematic PC or Windows installation.
- A PC that doesn't meet the minimum system requirements of the drive
- Check BIOS support and update, check Windows version.
- Windows hasn't assigned a letter to the drive.
- The drive doesn't get sufficient power
- all drives should have an AC power supply. Power supplements from the PC or laptop are rarely sufficient.
When discussing home-built drives, we must add a problem or two to the above list:
- The drive used was not jumpered properly.
- Pins were bent during the assembly the drive.
- The drive was not formatted from the factory and requires partitioning and formatting.Possible solutions to your problem
In Windows 2000 and XP, there is a utility called Disk Management (DISKMGMT.MSC). It's in Administrative Tools > Computer Management. The drive should appear there. If it does, try assigning it a letter. If that doesn't help, try marking the partition as active. Both actions can be done by clicking on your drive and clicking on Action
in the menu at the top. If your drive doesn't appear there, the following could be your problem:
Insufficient power. Most 3.5" drives come with AC adapters and these are rarely a problem. Unfortunately, 2.5" notebook-sized USB drives usually lack an AC adapter and are a huge problem. We have yet to see a USB disk drive that gets it's power from PC or laptop and works with any consistency
. Always seek a product which has it's own power source. If feel that this is not your case, maybe the next situation is your case:
The third most common issue is mis-jumpering the assembled drive. Western Digital and IBM/Hitachi have specific jumper settings for situations where the drive is not paired with a slave drive. Try changing the jumper settings to Cable Select (CS) if it is not that way already.
If none of these work, you can try a windows repair on the 2 computers that don't work. If you need help with doing that, let me know. We're gonna go through the list of most common causes of this kind of problem and I'll mark them off as we check them out.
Edited by computerwiz12890, 30 November 2005 - 12:37 PM.