Re: Ext USB HDD appearing as Hard Disk drive instead of Removable Stor
- From: Uwe Sieber <mail@xxxxxxxxxxxxx>
- Date: Mon, 24 Aug 2009 09:09:35 +0200
This is the strange but normal behaviour.
"Devices with Removable Storage" means a fixed drive with
a removable storage media as an Iomega ZIP drive or a
flash card reader. USB flash drives don't have a removable
media but they pretend to do by having the "Removable Media
Bit" (RMB) set in their device descriptor. It's wrong, it's
a lie, but it's also a fact...
USB hard drives could do the same but usually they don't.
Therefore they are shown under "Local Drives". Microsoft
just missed to change the criteria for ordering disk devices
from removable/fixed to hotplug/non hotplug.
Optimize for Quick Removal or Performance has usually no
effect. The only affected drives are USB harddrives which
are FAT/FAT32 formatted. They indeed get a write cache
when Optimize for Performance is set.
But the policies have never any effect on "Safely remove
hardware" succeeds or not. If there is an open reference
("a handle") on the drive to remove then it fails.
The SysInternals ProcessExplorer may be able to find these
open handles but you need the drive's kernel name to search
for.
http://www.uwe-sieber.de/drivetools_e.html#removal_fails
Uwe
ragz4ragz wrote:
Hi,.
I have a SATA HDD in a SATA enclosure which I use as an external/portable hard disk using a USB cable. But whenevwe I connect the ext hard disk, it appears under "Hard Disk Drives" instead of under "Devices with Removable Storage". The computer anyhow recognises it as a USB device and "Safely Remove" icon does appear in taskbar. But whenever I use the safely remove feature the hard disk does not get stooped. I used unlocker tool too. But still whenever I try safely removing it gives a message "The devcie cannot be stopped right now. Try again later". Also the device policy is also set to "Optimize for Performance" which I did manually. Please help me to configure my USB HDD to appear under removable storage.
Also the USB HDD appears unser "My Computer->Manage->Computer Management->Disk Management" whereas it should appear in ""My Computer->Manage->Computer Management->Removable Storage". Under Disk Management, the USB HDD is listed as a hard disk with "type" as "basic". Also in graphical view, the USB HDD is shown as "Disk 1" whereas my local HDD is shown as "Disk 0"
Also there is one more issue. Let it be any kind/make of USB mass storage device I connect to my desktop via USB, the default policy for all devices stays as "Optimize for Quick Removal". B'coz of this I am unable to safely remove my USB storage devcies.
Please provide me a solutionb to these issues.
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