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Windows 7: Disappearing internal HDD when eSATA dock used

05 Apr 2014   #1
mconway

Windows 7 Ultimate x64
 
 
Disappearing internal HDD when eSATA dock used

Here goes. A year ago or so I built a new machine for a friend. The mobo is a Z77A-GD65, a CM 690 II advanced case with the integrated eSATA dock, a 256GB Samsung 830 SSD as the C drive and a Caviar black as the D drive. The dock was connected to SATA4 with hot plug enabled and used extensively with no issues. A few days ago the computer was dropped off with a 500GB 840 Evo to replace the 830. This is the only hardware change. I installed Win7 x64 with zero issues and sent the computer back. I did update the BIOS and ran into a bad flash but was able to recover ok. Version 10.11 is on the A BIOS with 10.5 on the B. So my friend calls me up and says the external dock is giving him issues. When he plugs in a HDD, the internal Caviar black disappears. A scan for hardware changes brings it back (most times) but it shouldn't be disappearing. If the computer is booted cold with a drive in the dock everything is good until physically removed and reattached. When booted cold and attached, I can safely hotswap the drive. As long as I don't physically remove it, I can then scan for hardware changes and it comes back every time like it should. If I physically remove it after safely disconnecting and reattaching, the D drive vanishes every time. The pagefile is also on D. This has me completely baffled. I moved the internal connector to SATA6 and SATA8 on the AsMedia controller (enabling hot plug as I did so) with the same issues. I booted to the backup 10.5 BIOS and have all the same issues as described above. As I said, this has me completely stumped and is not something I've ever seen and God knows I've built dozens of machines and installed Win7 probably hundreds of times. Any ideas? TIA.


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06 Apr 2014   #2
TVeblen

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

To eliminate any BIOS related issues I would first do a ClearCMOS procedure with only the SSD attached. After successful ClearCMOS I would add back the HDD and check for correct drive letter, reboot and then try the dock.

If that was unsuccessful I would then try DriveCleanup, a program recommended by one of our members here. You can find a link to it in this thread:
Drive G: intermittently disappears

Let's see if either of those help.
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 Disappearing internal HDD when eSATA dock used




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