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Date:      Sun, 12 Apr 2020 18:38:10 +0200
From:      Stefan Bethke <stb@lassitu.de>
To:        Slawa Olhovchenkov <slw@zxy.spb.ru>
Cc:        freebsd-stable <freebsd-stable@freebsd.org>
Subject:   Re: make kernel ignore broken SATA disk
Message-ID:  <D67DEF55-9E1B-4499-9455-E1474F5CFC26@lassitu.de>
In-Reply-To: <20200412163104.GI8012@zxy.spb.ru>
References:  <A33629CA-63EC-45AA-AB06-09B003BBB0A6@lassitu.de> <20200412154319.GO8028@zxy.spb.ru> <9D60946A-6D81-444B-B6D0-36202B3BE5C6@lassitu.de> <20200412163104.GI8012@zxy.spb.ru>

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> Am 12.04.2020 um 18:31 schrieb Slawa Olhovchenkov <slw@zxy.spb.ru>:
>=20
> On Sun, Apr 12, 2020 at 06:24:09PM +0200, Stefan Bethke wrote:
>=20
>> Am 12.04.2020 um 17:43 schrieb Slawa Olhovchenkov <slw@zxy.spb.ru>:
>>>=20
>>> On Sun, Apr 12, 2020 at 04:37:06PM +0200, Stefan Bethke wrote:
>>>=20
>>>> I have a server I don't have physical access to right now, which =
has a broken SATA disk that produces mostly errors (but not entirely).
>>>>=20
>>>> The disk has two partitions that are part of a zpool each. I can't =
bring the system up with this disk being online, because ZFS is trying =
its darndest to use it.
>>>>=20
>>>> I already renamed the GPT partitions in the hope that ZFS would not =
find them anymore, but it does.
>>>>=20
>>>> I can't gpart destroy -f ada1 because "device busy".
>>>>=20
>>>> 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.
>>>=20
>>> `zpool offline pool device` if you have enoght redundancy?
>>=20
>> I do, but the command doesn't return. Instead, I'm getting loads of =
sata error message.
>=20
> What you zpool configuration?

This is from the working system. The identifiers are slightly different, =
but the structure is identical.

# zpool status
  pool: data
 state: ONLINE
status: Some supported features are not enabled on the pool. The pool =
can
	still be used, but some features are unavailable.
action: Enable all features using 'zpool upgrade'. Once this is done,
	the pool may no longer be accessible by software that does not =
support
	the features. See zpool-features(7) for details.
  scan: resilvered 176K in 0 days 00:01:28 with 0 errors on Sun May 26 =
21:24:54 2019
config:

	NAME              STATE     READ WRITE CKSUM
	data              ONLINE       0     0     0
	  mirror-0        ONLINE       0     0     0
	    gpt/ls0data   ONLINE       0     0     0
	    gpt/ls1data   ONLINE       0     0     0
	logs
	  gpt/data0log    ONLINE       0     0     0
	cache
	  gpt/data0cache  ONLINE       0     0     0

errors: No known data errors

  pool: ls-host
 state: ONLINE
status: Some supported features are not enabled on the pool. The pool =
can
	still be used, but some features are unavailable.
action: Enable all features using 'zpool upgrade'. Once this is done,
	the pool may no longer be accessible by software that does not =
support
	the features. See zpool-features(7) for details.
  scan: scrub repaired 0 in 0 days 00:06:33 with 0 errors on Sun Apr 12 =
11:46:25 2020
config:

	NAME              STATE     READ WRITE CKSUM
	ls-host           ONLINE       0     0     0
	  mirror-0        ONLINE       0     0     0
	    gpt/ls0host   ONLINE       0     0     0
	    gpt/ls1host   ONLINE       0     0     0
	logs
	  gpt/host0log    ONLINE       0     0     0
	cache
	  gpt/host0cache  ONLINE       0     0     0

errors: No known data errors


--
Stefan Bethke <stb@lassitu.de>   Fon +49 151 14070811


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