Raid-1 with identical disks, different speeds

[jay11]

I have set up a RAID-1 with two identical harddisks WD VelociRaptor WD 3000HLHX-01JJPV0 on an onboard Z77 controller.
Intel Rapid Storage application reports drive 0 running at 3Gb/s and drive 1 at 6Gb/s.


???

 

[popatim]

Is one connected to a sata2 port and the other to a sata3 port?

 

[jay11]

Is one connected to a sata2 port and the other to a sata3 port?

They are both connected to Sata 6Gb/s ports.

 

[popatim]

Is here a jumper between 5&6 (I beleive) on the sata2 drive?
if not then try a new cable. rebooting also sometimes helps.
Its a failure of the dive and motherbd to auto-negotiate the sata3 speeds and it falls back to sata2.

 

[jay11]

I have no explanation for it, but IRST reports both drives now running at 6Gb/s (didn't change anything).

 

[popatim]

I would still consider getting higher quality sata cables. Since the jumper is definitely not on (it switched back to sata3) then the problem is in the signaling.

 

[jay11]

It keeps changing from 3Gb/s to 6Gb/s and back.
I'm returning this brand new system for repair.

 

[popatim]

sorry to hear that but glad its brand new and you have that option.

 

[jay11]

Switched ports, stable now.