make kernel ignore broken SATA disk

[Eugene Grosbein]

12.04.2020 23:30, Stefan Bethke пишет:
> Am 12.04.2020 um 18:29 schrieb Eugene Grosbein <eugen at grosbein.net <mailto:eugen at grosbein.net>>:
>>
>> 12.04.2020 21:57, Stefan Bethke wrote:
>>
>>>>> Is there a way, ideally in the loader, to tell the kernel to ignore ada1 and/or ahcich5? Or can I force ZFS some other way to ignore the disk? I do have a spare disk I can use to replace the failed one, but I can't get the machine into a state where I could even issue the zpool replace command.
>>>>
>>>> It depends on the HDD controller the disk is attached to. What controller and driver does it have?
>>>
>>> This is from an identlical machine without disk issues:
>>>
>>> # camcontrol devlist
>>> <ST3000DM001-1CH166 CC27>          at scbus4 target 0 lun 0 (ada0,pass0)
>>> <ST3000DM001-1CH166 CC27>          at scbus5 target 0 lun 0 (ada1,pass1)
>>> <ST3000DM001-1CH166 CC27>          at scbus6 target 0 lun 0 (ada2,pass2)
>>> <AHCI SGPIO Enclosure 2.00 0001>   at scbus8 target 0 lun 0 (pass3)
>>> # pciconf -lv
>>> ...
>>> ahci0 at pci0:0:23:0:class=0x010601 card=0x088415d9 chip=0xa1028086 rev=0x31 hdr=0x00
>>>    vendor     = 'Intel Corporation'
>>>    device     = 'Q170/Q150/B150/H170/H110/Z170/CM236 Chipset SATA Controller [AHCI Mode]'
>>>    class      = mass storage
>>>    subclass   = SATA
>>
>> And your FreeBSD version?
> 
> FreeBSD 12.1-STABLE r358833 amd64

Try something like this at loader prompt:

set hint.ahcich.5.disabled=1

or

set hint.ada.1.disabled=1