Am I using atacontrol attach properly? (sata hotplug issue).

[George Hartzell]

Alexander Motin writes:
 > George Hartzell wrote:
 > > Alexander Motin writes:
 > >  > George Hartzell wrote:
 > >  > > I have a Gigabyte GA-6KIEH-RH motherboard.  It has 5 SATA ports, 4
 > >  > > attached to a Sil 3114 controller and 1 attach to an ICH8m.  The
 > >  > > system is running -CURRENT from yesterday.
 > >  > > 
 > >  > > I have two disks attaching as ad4 and ad6 to ata2 and ata3 resp.
 > >  > > 
 > >  > > I can set ACHI mode for ICH8m in the BIOS.  When I do not enable it,
 > >  > > the 5th SATA conector shows up as slave on ata6.  When I do enable it
 > >  > > the 5th connector shows up as master on ata8.
 > >  > > 
 > >  > > If I boot without anything connected to the fifth port, then connect a
 > >  > > drive I thought that the following should work to get the drive
 > >  > > recognized:
 > >  > > 
 > >  > >   sudo atacontrol detach ata8
 > >  > >   sudo atacontrol attach ata8 
 > >  > > 
 > >  > > (or a similar dance with ata6 if AHCI isn't enabled).
 > >  > 
 > >  > It is ICH8M port, right?
 > >  > 
 > >  > > When I set boot_verbose in loader.conf I see the following when I
 > >  > > attach (two separate attempts with different SATA drives):
 > >  > > 
 > >  > > ata8: AHCI reset...
 > >  > > ata8: SATA connect status=00000004
 > >  > > ata8: AHCI reset done: phy reset found no device
 > >  > > ata8: [MPSAFE]
 > >  > > ata8: [ITHREAD]
 > >  > > ata8: Identifying devices: 00000000
 > >  > > ata8: New devices: 00000000
 > >  > > ata8: AHCI reset...
 > >  > > ata8: SATA connect status=00000004
 > >  > > ata8: AHCI reset done: phy reset found no device
 > >  > > ata8: [MPSAFE]
 > >  > > ata8: [ITHREAD]
 > >  > > ata8: Identifying devices: 00000000
 > >  > > ata8: New devices: 00000000
 > >  > 
 > >  > There is very little part of AHCI driver takes part on this stage. 
 > >  > Mostly it is done by common ata_sata_phy_reset() routine. Try to comment
 > >  > 	if ((ATA_IDX_INL(ch, ATA_SCONTROL) & ATA_SC_DET_MASK) == 
 > >  > ATA_SC_DET_IDLE)
 > >  > 		return ata_sata_connect(ch);
 > >  > lines in there. It will force full hardware reset to the drive.
 > >  > 
 > >  > > If the drive's attached at boot time then it's recognized.
 > >  > > 
 > >  > > Am I doing something wrong, or is my hardware balky?
 > >  > 
 > >  > Every hardware has some specifics. I have successfully tested hot-plug 
 > >  > working with AHCI on ICH8, ICH8M and JMB363.
 > > 
 > > When I comment out those lines I end up with an unbootable kernel.  I
 > > get to the point that it tries to mount root and it gives me a prompt
 > > asking me what to mount.
 > 
 > Have you saved any ata messages?
 > 
 > > I don't know if it's the same problem or
 > > not, but the USB keyboard is also unresponsive.
 > 
 > I don't see direct relations.
 > 
 > > Somehow, in the course of playing with this and rebooting when things
 > > hung, I've ended up with several hundred errors in the zpool.  It'll
 > > take me a few evenings to reinstall and rebuild things.
 > 
 > It's a pity. On my systems commenting this lines does not brake anything.

I'll build up a simpler test -CURRENT system (no ZFS, etc...) and give
it another try.  I won't get to it until next Wednesday or so though,
work and travel will be keeping me busy.

Thanks for the help!

g.