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Windows 7: Disk Management vs Bios SATA drives

04 Jul 2014   #1

windows 7 32
Disk Management vs Bios SATA drives

Interesting. Not a problem cuz everything works fine.

But... in disk management... my boot drive (PNY 240gb SSD) is listed as in disk 1, with my data drive (Seagate 480gb SSD) listed as disk 0

While my BIOS says the PNY is connected to SATA 1, and the Seagate to SATA 2

should i be concerned? Can it be fixed? Does it need to be?

Attached Thumbnails
Disk Management vs Bios SATA drives-drive-man.png   Disk Management vs Bios SATA drives-bios-sata.png  
My System SpecsSystem Spec
04 Jul 2014   #2

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1

You do not need to be concerned.
By convention, all SATA ports are treated equally by the System. There will be no performance improvement based upon which port the drive is connected to (that applies to the standard chipset ports - any add on controller ports are a different story).

BIOS recognizes disks by which SATA port they are connected to, Windows identifies DISKS by an identifier code kept in the registry. Once a disk gets identified as Disk 0 it will remain Disk 0 until something changes.

IF you are OCD (like me) you can try this:
  • Shut down the computer, and switch off the power supply.
  • Disconnect the larger Seagate drive (SATA2 in BIOS, DIsk 0 in Windows)
  • Switch the power supply back on, and restart the computer. Enter Windows and check Disk Management to see if the PNY SSD is now Disk 0.
  • Shut down and reconnect the Seagate. Restart and see if it stays that way.
Let us know!
My System SpecsSystem Spec
04 Jul 2014   #3

Windows 7 Pro x64 Windows 10 Pro x64

Did you install the Intel Sata drivers ? If it uses them ?

Check Device Manager
My System SpecsSystem Spec

04 Jul 2014   #4

Windows 7x64 Home Premium SP1

You can't always guarantee a one to one mapping between sata port and disk drive number.
Disk drive numbers may not correspond to the SATA channel numbers when you install Windows on a computer that has multiple SATA or RAID disks
and discussed before on this forum
Diskpart / Disk Management vs the BIOS
This normally isn't a problem BUT
your first disk (0) has an active partition up the front. You don't want to be booting disk 1 through disk 0. If you unplug disk 0 and you boot ok then you're fine. Just mark the first partition on disk 0 NOT active. If you can't boot then you are booting through disk 0. This can be fixed.
My System SpecsSystem Spec

 Disk Management vs Bios SATA drives

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