Re: Scanning a not configured atabus?

["Jonathan A. Kollasch" <jakllsch%kollasch.net@localhost>]

On Thu, Aug 01, 2019 at 05:41:47PM +0200, tlaronde%polynum.com@localhost wrote:
> Hello,
> 
> If, at boot time, a SATA disk is attached (possibly with eSATA
> connection), the corresponding atabus? is configured and one can
> detached the disk and, later, re-attached it by rescanning with
> drvctl(8) the atabus? .
> 
> But if, at boot time, this atabus? has not been configured, is there a
> way to force a running kernel to attach it?
> 
> I tried to rescan the parent pci device but to no avail.
> 
> I tried to explicitely set in the kernel config the atabus present (by
> expanding the atabus* at ata?: atabus0 at ata? etc.) but this doesn't do
> the trick either.
> 
> Is there one (trick)? Or is there a way, in the kernel config file, to
> force the configuration of all the atabuses so that the atabuses always
> exist?
> 
> TIA

Could you provide both dmesgs?

I've seen some machines, particularly newer laptops, where the port on
the AHCI is disabled if no device was found by the platform firmware at
boot time.

	Jonathan Kollasch