USB External Hard Disk Not Recognized

hmedme
hmedme used Ask the Experts™
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Hi all, here is the deal…

Dell PowerEdge 2950

Windows Server 2008 Standard 64 bit.

External Enclosure is Macally G-S350SU.

Hard disk is Western Digital WD1001FALS

I have four of these external disks (Macally enclosure/WD HDD), two of them have just stopped showing up in disk management.  They show in device manager as either PI-202US SATA/USB20 Drive USB Device OR Ext Hard  Disk USB Device.  If I connect these drives to another machine, they are detected fine.  I have swapped the enclosure and the disk is still not detected.

Any help greatly appreciated…

Thanks,

G
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Do you have a different enclosure type you can try?

Do you have a SATA to USB converter you can try?

Commented:
Do you have all 4 HD's connected at the same time.
Try to check one by one, with all available USB ports.

Author

Commented:
I will see if i have another enclosure type I can try.  Initally i had good luck with these, so i bought a bunch that are used on this server as well as two other servers.  The two other servers are not having the same issue with these disks.

I do not have a sata to usb converter, but will pick one up now that is know there is such a thing - will order.

I do not have all 4 connected at the same time.  I use them to rotate off site backups.  I have tried the ext disks on all avalable usb ports.

Thanks for your help.
Does the drive show up in the Disk Management tool typically found by right clicking my computer and clicking manage.  If so you may have a drive letter conflict.

Author

Commented:
No, the drives do not show up in Disk Management.
This is a great item to have around: http://www.buy.com/retail/product.asp?sku=210679778&listingid=37287146

You could also try reinstalling the chipset drivers.

I feel as though I should also ask. Have you not considered implementing an automated off site backup solution? Save you a ton of foot work and can be done for next to free depending on your needs.
Top Expert 2013

Commented:
in device manager>view - click show hidden devices
delete all instances relating to the drives, reboot and test
Top Expert 2012
Commented:
If the drives work fine with another machine, then I suspect the problem is with your server - either the USB ports aren't working properly or the OS has been corrupted.

Test the USB ports with other USB devices and other USB external drives - if they work, the USB ports are fine, and it may be that the driver needs to be refreshed by deleting the USB driver and rebooting.

If they don't work, you may need a PCI USB card because the motherboard ports are broken.

Author

Commented:
Thanks to all for the advice.

Sorry it has taken so long to reply, I could not reboot until last night.

Reconnected external USB hard disk and all seems well after reboot.  What I noticed before the reboot in Disk Management were multiple un-initialized disks at 125 gigs a piece.  They were labeled “Msft Virtual Disk SCSI Disk Device”.  I could not remove them in any way.  It appears that they are created while backing up Hyper-V Virtual Machines, but are supposed to be removed after the VM’s are backed up.  I am using Symantec Backup Exec to back up 3 VM’s.

Thanks for your time…
Glad you got this resolved!!!!

Author

Commented:
This issue appears to be a Symantec Backup Exec and/or Hyper-V issue.  Temporary MSFT Virtual Disk SCSI Disk Drive's are created, but not removed at the end of backup.  This "seems" to be, over time as they add up in device manager, causing issues to usb drives added and taken away from the system.

Author

Commented:
This issue appears to be a Symantec Backup Exec and/or Hyper-V issue. Temporary MSFT Virtual Disk SCSI Disk Drive's are created, but not removed at the end of backup. This "seems" to be, over time as they add up in device manager, causing issues to usb drives added and taken away from the system.

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