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Windows 7: partition E dissapears sometime

03 Aug 2010   #11

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1

If the second SATA disk is not disappearing anymore, I would leave well enough alone. Just keep your eye on it.

If you want, or if it happens again, some other things to check:

  • Go into your BIOS and check and to see that both drives are recognized in BIOS.
  • In BIOS, note the SATA controller mode. Is it set on ACHI, or IDE mode? (Don't change anything, just note it).
  • Open Device Manager > Disk Drives. Both HDDs should show Here.
  • Open Computer Management > Disk Management. Both HDDs should show Here. Both drives should be marked "Online".
  • While in Disk Management, Right click on the second drive, choose "Properties" > go to the "Policies" tab > and check: "better performance" and "enable write caching" if not selected already.
  • Run the Windows Experience Index. (This will test the drives and sometimes resets things if they've changed)

Worst case you could be dealing with a bad Sata cable, a failing hard drive, or a failing Sata controller/motherboard. But that's worst case. Just keep an eye on things for now.

My System SpecsSystem Spec

 partition E dissapears sometime

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