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Fri, 08 Mar 2024 22:02:29 +0100 Message-ID: <5b35783e-941e-4f1e-9c55-84fd319e6322@gmx.com> Date: Sat, 9 Mar 2024 07:32:24 +1030 Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: raid1 root device with efi Content-Language: en-US To: Matt Zagrabelny , Btrfs BTRFS References: From: Qu Wenruo Autocrypt: addr=quwenruo.btrfs@gmx.com; keydata= xsBNBFnVga8BCACyhFP3ExcTIuB73jDIBA/vSoYcTyysFQzPvez64TUSCv1SgXEByR7fju3o 8RfaWuHCnkkea5luuTZMqfgTXrun2dqNVYDNOV6RIVrc4YuG20yhC1epnV55fJCThqij0MRL 1NxPKXIlEdHvN0Kov3CtWA+R1iNN0RCeVun7rmOrrjBK573aWC5sgP7YsBOLK79H3tmUtz6b 9Imuj0ZyEsa76Xg9PX9Hn2myKj1hfWGS+5og9Va4hrwQC8ipjXik6NKR5GDV+hOZkktU81G5 gkQtGB9jOAYRs86QG/b7PtIlbd3+pppT0gaS+wvwMs8cuNG+Pu6KO1oC4jgdseFLu7NpABEB AAHNIlF1IFdlbnJ1byA8cXV3ZW5ydW8uYnRyZnNAZ214LmNvbT7CwJQEEwEIAD4CGwMFCwkI BwIGFQgJCgsCBBYCAwECHgECF4AWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCY00iVQUJDToH pgAKCRDCPZHzoSX+qNKACACkjDLzCvcFuDlgqCiS4ajHAo6twGra3uGgY2klo3S4JespWifr BLPPak74oOShqNZ8yWzB1Bkz1u93Ifx3c3H0r2vLWrImoP5eQdymVqMWmDAq+sV1Koyt8gXQ XPD2jQCrfR9nUuV1F3Z4Lgo+6I5LjuXBVEayFdz/VYK63+YLEAlSowCF72Lkz06TmaI0XMyj jgRNGM2MRgfxbprCcsgUypaDfmhY2nrhIzPUICURfp9t/65+/PLlV4nYs+DtSwPyNjkPX72+ LdyIdY+BqS8cZbPG5spCyJIlZonADojLDYQq4QnufARU51zyVjzTXMg5gAttDZwTH+8LbNI4 mm2YzsBNBFnVga8BCACqU+th4Esy/c8BnvliFAjAfpzhI1wH76FD1MJPmAhA3DnX5JDORcga CbPEwhLj1xlwTgpeT+QfDmGJ5B5BlrrQFZVE1fChEjiJvyiSAO4yQPkrPVYTI7Xj34FnscPj /IrRUUka68MlHxPtFnAHr25VIuOS41lmYKYNwPNLRz9Ik6DmeTG3WJO2BQRNvXA0pXrJH1fN GSsRb+pKEKHKtL1803x71zQxCwLh+zLP1iXHVM5j8gX9zqupigQR/Cel2XPS44zWcDW8r7B0 q1eW4Jrv0x19p4P923voqn+joIAostyNTUjCeSrUdKth9jcdlam9X2DziA/DHDFfS5eq4fEv ABEBAAHCwHwEGAEIACYCGwwWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCY00ibgUJDToHvwAK CRDCPZHzoSX+qK6vB/9yyZlsS+ijtsvwYDjGA2WhVhN07Xa5SBBvGCAycyGGzSMkOJcOtUUf tD+ADyrLbLuVSfRN1ke738UojphwkSFj4t9scG5A+U8GgOZtrlYOsY2+cG3R5vjoXUgXMP37 INfWh0KbJodf0G48xouesn08cbfUdlphSMXujCA8y5TcNyRuNv2q5Nizl8sKhUZzh4BascoK DChBuznBsucCTAGrwPgG4/ul6HnWE8DipMKvkV9ob1xJS2W4WJRPp6QdVrBWJ9cCdtpR6GbL iQi22uZXoSPv/0oUrGU+U5X4IvdnvT+8viPzszL5wXswJZfqfy8tmHM85yjObVdIG6AlnrrD In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:LU66TnTvDKGDybWxas1FGiRi1s0UbrtoSWWTUwwqg3tnvEWRFBZ 79dK7sN+SGCHDAmVaMTzmRW1+4FFquTAb+I601Iodrx/VoRG7oSBqfF8Z/p4APNF/wuloTI qk8NVfuk8IkxIZqG50DWU7170/y3fk4VzMif2CZ0chgnfIPlevnPfxFBYrK7gsrRqVKhlbQ k4Uq84Do2dIpRyj8G9wnA== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:qvhIlUrXm04=;ZyY2rbu/tk8y/csFOQ9jDGbbKp/ qfaC44B0r77ILu923K3fAR73ncLM7QNYd0PqY/9SMMsYoI0pPRnNAhz5I2UupfHGn0O7NXkug XyHIBBDT/uBtrRWZ0pTc6vYaUXapVPf1jkw4kWN/CuKiH3Pa69Bk4vAPvWWCw5hq0j1HdWP+f iKA0F7iUA4XHivx0HaJqO+5wkAuuBzf5ZRKJh0ViOlSLfrG1wUfu/bDMsm5LTjHoXvmGFXL3f CIjL54/1ayh2KOfniEuEnUErlKdMyvKwVJYngfQhokaXRccjYmy6cDb3HaU3NrlpMczUFKP+x gUW12kYroOOydi3t97TsMOpgxWveY079rnrT3bK1kYl0nZovo9vc8qBZaVSaF+iS+qqznGWkh mp1H+FL0otcAhEV5/PS6fHoo/ZBNyhnjABDKxg38/ezLj991F6qq9ZMULWtexsQ/6TnfcX4Uh YK9jfbtwop/rljrmJCsJJjSrND9SDB0+M2jmnpLRHXVCxed1M2C/6qGCXncaSC0KIlNRKZ8Ue DStiylwx9u+jvhoelZc1cL4RNL9POa3RVVxxTL/L05DFqWOV+3Nyhd7OYcbI8my3NJZjTHSnm 2442+JtS2lqZipIdgBHjnVv5PYOi4PvU0pTeMyeVr9Txrl/67BvYyHMQtFMVLnr44jDGvwiQp 21gURSpkEFYzJF3YmkN/24xVOhsmn+U7Tg5LmMC4V7ws15sUAhOXVJBxkTsRRUniU6R+EUzWb uEceC4nGT9std1owEpi6kqIKQ4NXnwh9GJlfewmI9I0AP/JuezDvTl3G46xLTUAogLvD06waa fHB9PgfmBxzRQmuPFXc+o+qtqpnBWHQxHefm60K0CbaUw= =E5=9C=A8 2024/3/9 07:09, Matt Zagrabelny =E5=86=99=E9=81=93: > Greetings, > > I've read some conflicting info online about the best way to have a > raid1 btrfs root device. > > I've got two disks, with identical partitioning and I tried the > following scenario (call it scenario 1): > > partition 1: EFI > partition 2: btrfs RAID1 (/) This really depends on how you want to setup your bootloader. In my case, I hate GRUB2 so much that I always go with: - Partition 1: EFI (also as /boot) This includes both the EFI bootloader (systemd-boot), along with kernel and its initramfs. The disadvantage is, if you go LUKS, your kernel/initramfs will never be encrypted, thus exporting some risks (e.g. some attacker with physical access to your system can implant some rootkit into your initramfs and steal your credential) - Partition 2: Whatever you want It can be btrfs RAID*, or even other fs over LUKS over LVM etc. > > There are some docs that claim that the above is possible and others > that say you need the following scenario, call it scenario 2: > > partition 1: EFI > partition 2: MD RAID1 (/boot) > partition 3: btrfs RAID1 (/) At least OpenSUSE TumbleWeed doesn't need a dedicated /boot, and it is using GRUB2. So I don't think a dedicated /boot is mandatory. Thanks, Qu > > What do folks think? Is the first scenario setup possible? or is the > second setup the preferred way to achieve a btrfs RAID1 root > filesystem? > > The reason I ask is that I followed a guide (for scenario 1) and > rebooted the computer after each step to verify that things worked. > After I finished the whole guide, I unplugged one of the disks (with > the system off) and the BIOS could no longer find the disk. I then > plugged the disk back in and the BIOS could still not find the disk, > so something is amiss. > > Thanks for any commentary and help! > > -m >