Re: delete whole file system

Kengo.M
2022-09-06T10:30:19Z

Hi Hugo

Thanks for your inform.

I know wipefs.
But it's too primitive.
I will try to later.
Thanks again

kengo
At 10:12 +0100 2022.09.06, Hugo Mills wrote:
>On Tue, Sep 06, 2022 at 05:59:21PM +0900, Kengo.M wrote:
>> Hi folks
>>
>> I made raid5 file system by btrfs like below
>>
>> sudo mkfs.btrfs -L raid5.btrfs -d raid5 -m raid1 -f /dev/sda /dev/sdb
>> /dev/sdc /dev/sdd /dev/sde
>>
>> And mount /mnt/raid5.btrfs
>>
>> sudo btrfs filesystem show
>>
>> Label: 'raid5.btrf' uuid: 23a34a45-8f5e-40f5-8cda-xxxxxxxxxxxx
>> Total devices 5 FS bytes used 128.00KiB
>> devid 1 size 2.73TiB used 1.13GiB path /dev/sda
>> devid 2 size 2.73TiB used 1.13GiB path /dev/sdb
>> devid 3 size 2.73TiB used 1.13GiB path /dev/sdc
>> devid 4 size 2.73TiB used 1.13GiB path /dev/sdd
>> devid 5 size 2.73TiB used 1.13GiB path /dev/sde
>>
>>
>> So,I want to delete this file system.
>>
>> btrfs device delete /dev/sda /mnt/raid5.btrfs
>>
>> But delete /dev/sda only.
>>
>> Please Someone tell me how to delete whole this file system.
>>
>> BRD
>>
>> Kengo.m
>
> "btrfs dev delete" remove a device from the SF leaving the rest of
>it intact. To destroy the filesystem completely, wipe the start of the
>device on each device. You can do that with any tool that will write
>data (dd if=/dev/zero is a popular one here), but there's a generic
>tool called wipefs that will do it for any filesystem with minimal
>writes to the device and a good level of recoverability if you get it
>wrong.
>
> Hugo.
>
>--
>Hugo Mills | Klytus, I'm bored. What plaything can you offer me
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