AHCI hot replace sdX incrementing

AHCI hot replace sdX incrementing

[Gaston, Jason D]

Hello,

When I hot-remove a SATA HD in AHCI mode and then hot-plug the drive
back in again, the /dev/sdX number changes to the next available number.
Is this going to be a problem when using a RAID array that includes that
drive?

Thanks,

Jason

Re: AHCI hot replace sdX incrementing

[Jeff Garzik]

Gaston, Jason D wrote:
> When I hot-remove a SATA HD in AHCI mode and then hot-plug the drive
> back in again, the /dev/sdX number changes to the next available number.
> Is this going to be a problem when using a RAID array that includes that
> drive?

Well, it's certainly something you have to deal with.  You have to tell 
the RAID driver you added a component to the system.  Ideally mdadm or 
udev should take care of that, but I'm not sure it's all there yet.

In any case, it's a new device so, while inconvenient for some 
scenarios, I think it is best to represent a new device with a new 
device node.  Various entities are still probably holding references to 
the old device, and you don't want the system to think that you plugged 
in the _same_ device again.

	Jeff