• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 733
  • Last Modified:

How do I change drive letter allocation to recognise an external usb hard drive

Hi guys,

I have an HP Pro Book with an internal drive partitioned into three volumes (C:, D: and E:). I also have an external USB hard drive (G:) attached which I use for backups. Before this I had a Dell laptop from which I rescued the two internal disks before the computer died and put them into their own case/caddy. These disks work.

My problem is that when I try to connect them via a USB cable to my HP, the HP doesn't recognise them or pick them up. I have a feeling that the problem is related to drive letter allocation but I'm not sure. I've already tried changing drive letters through Computer Management and that didn't work but I also think here that I may not have done it correctly.

Advice here would be really appreciated. I need to get access to the info on those drives.

Thanks

Carl
0
Carl
Asked:
Carl
4 Solutions
 
Joe Winograd, EE MVE 2015&2016DeveloperCommented:
Hi Carl,

If the HP is not recognizing them, then it's probably not a drive letter issue. However, if that is the issue (unlikely, imo) and you're not sure that you've changed the drive letters correctly in Computer Management>Disk Management, this article explains how to do it:
http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Windows/A_12280-Running-Out-of-Drive-Letters.html

You may ignore lead-in — I was just having a little fun. :)  Regards, Joe
0
 
Chris HInfrastructure ManagerCommented:
Unlpug them, plug them in.  Do you hear any system noises like you just added a device?  If you put your ear close to the HD, is it spinning up and receiving enough power?  More than likely, you'll need a powered USB hub in order to mount the drives.  Most laptops have 5v USB, and you may not be supplying them enough power.  Also, check device manager, right click disk drives and click "Scan hardware for changes".  Do the drives appear?  

You say two drives, which leads me to believe that maybe these drives are a RAID array?  If they're in a RAID-0 configuration, you'll need to use a program like active undelete or R-studio to rebuild/Mount the RAID.
0
 
rindiCommented:
In diskmanagement the disk is probably set to "offline". Right click the disk (not the partition(s)) and then select "online". After that you should be able to assign drive letters to the partitions.
0
Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

 
nobusCommented:
>>  when I try to connect them via a USB cable to my HP, the HP doesn't recognise them or pick them up.  <<  am i correct you don't have the notification sound?
does this external disk have it's own power supply ?  if not use a powered USB hub, since many laptops do NOT provide enough power on the usb -  which is Max for USB 2 : 5V at 0.5 A= 2.5 Watt !
here examples of powered usb hubs : http://lifehacker.com/five-best-usb-hubs-1414094277
0
 
CarlAuthor Commented:
Hi guys,

thanks for taking the time to answer my question. I've given you all points because all the answers were valid, and I did check them all because that's what I remember doing in the past. The problem ended up being a hardware issue in that the cases I had the drives installed in were U/S and the cable itself was broken. I found this out when, in desperation, I took my computer to my local PC shop to get another opinion. A new cable and new cases later, I could get my data back.

Thanks
0
 
Joe Winograd, EE MVE 2015&2016DeveloperCommented:
You're welcome. Great to hear you got your data back!
0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now