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[2a02:3102:6876:11:5b51:e1db:2186:dbe4]) by smtp.gmail.com with ESMTPSA id b9-20020a0564021f0900b0056e59d747b0sm2961205edb.40.2024.04.13.14.37.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 13 Apr 2024 14:37:31 -0700 (PDT) Message-ID: <5a4a9b82-2082-4d25-906d-ee01b10fad65@gmail.com> Date: Sat, 13 Apr 2024 23:37:12 +0200 Precedence: bulk X-Mailing-List: linux-raid@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: regression: drive was detected as raid member due to metadata on partition To: Li Nan , linux-raid@vger.kernel.org References: <93d95bbe-f804-4d12-bd0d-7d3cc82650b3@gmail.com> <90ebc7c2-624c-934b-1b5b-e8efccfda209@huaweicloud.com> <08a82e10-dc6b-41f9-976a-e86a59cfd54d@gmail.com> Content-Language: en-US From: =?UTF-8?Q?Sven_K=C3=B6hler?= In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hi, Am 11.04.24 um 04:25 schrieb Li Nan: > Hi, > > 在 2024/4/11 4:59, Sven Köhler 写道: >> Hi, >> >> Am 10.04.24 um 03:56 schrieb Li Nan: >>> Hi, Köhler >>> >>> 在 2024/4/9 7:31, Sven Köhler 写道: > > [...] > >> >> I should have mentioned the mdadm and kernel version. I am using >> mdadm 4.3-2 and linux-lts 6.6.23-1 on Arch Linux. >> >> I created the array very similar to what you did: >> mdadm --create /dev/md4 --level=6 --raid-devices=4 --metadata=0.90 >> /dev/sd[abcd]4 >> >> My mdadm.conf looks like this: >> DEVICE partitions >> ARRAY /dev/md/4 metadata=0.90  UUID=... >> >> And /proc/partitions looks like this: >> >> major minor  #blocks  name >>     8        0 2930266584 sda >>     8        1    1048576 sda1 >>     8        2   33554432 sda2 >>     8        3   10485760 sda3 >>     8        4 2885176775 sda4 >>     8       16 2930266584 sdb >>     8       17    1048576 sdb1 >>     8       18   33554432 sdb2 >>     8       19   10485760 sdb3 >>     8       20 2885176775 sdb4 >>     8       32 2930266584 sdc >>     8       33    1048576 sdc1 >>     8       34   33554432 sdc2 >>     8       35   10485760 sdc3 >>     8       36 2885176775 sdc4 >>     8       48 2930266584 sdd >>     8       49    1048576 sdd1 >>     8       50   33554432 sdd2 >>     8       51   10485760 sdd3 >>     8       52 2885176775 sdd4 >> >> >> Interestingly, sda, sdb, etc. are included. So "DEVICE partitions" >> actually considers them. >> > > I used your command and config, updated kernel and mdadm, but raid also > created correctly after reboot. > > My OS is fedora, it may have been affected by some other system tools? I > have no idea. The Arch kernel has RAID autodetection enabled. I just tried to reproduce it. While mdadm will not consider /dev/sd[ab] as members, the kernel's autodetection will. For that you have to reboot. I used this ISO in a VM with 2 harddisks to reproduce the issue: https://mirror.informatik.tu-freiberg.de/arch/iso/2024.04.01/archlinux-2024.04.01-x86_64.iso Kind Regards,   Sven