[Solved] Pool becomes unavailable after reboot

99davide · November 18, 2024, 7:28pm

Hi everyone,
it’s the first time I use TrueNAS and I have this problem.
Basically I created a pool with only one SSD disk called Playground. I only use this pool to contain virtual machines and I don’t need it to be duplicated in another SSD for safety.
The fact is that the pool works, but if I restart the server the pool becomes unusable. To solve it each time I have to click on the “Export/Disconnect” button and keep only Confirm Export ticked, then I do Import Pool and everything starts working again.
Can you tell me what I’m doing wrong?
I ran the disk checks and everything is in good health, I add that I have another pool made up of 3 hdds that do not encounter this problem.

TrueNAS Scale version: ElectricEel-24.10.0.2

bacon · November 18, 2024, 9:30pm

Has the SSD be used by another system that uses ZFS?

If so, you might have encountered this issue:
https://ixsystems.atlassian.net/jira/software/c/projects/NAS/issues/NAS-132414

SmallBarky · November 18, 2024, 9:43pm

You should give hardware details. Are all your disks directly attached by SATA to the motherboard? Wondering if this is a USB problem since you didn’t list.

99davide · November 19, 2024, 7:09am

It is attached via SATA to the motherboard

99davide · November 19, 2024, 7:12am

It was an SSD that was previously used as the primary SSD for a notebook and it contained Windows 10. I didn’t format it because I thought TrueNAS did that, do you think this could be the problem?

bacon · November 19, 2024, 7:20am

Windows uses NTFS, that shouldn’t be an issue. You might have a different issue than the one I was thinking of.

Can you post the output of the following shell commands:

sudo grep -i import /var/log/middlewared.log
sudo blkid

99davide · November 19, 2024, 7:30am

[2024/11/19 09:40:56] (DEBUG) PoolService.import_on_boot():444 - Creating '/data/zfs' (if it doesnt already exist)
[2024/11/19 09:40:56] (DEBUG) PoolService.import_on_boot():451 - Creating '/data/zfs/zpool.cache' (if it doesnt already exist)
[2024/11/19 09:40:56] (DEBUG) PoolService.import_on_boot_impl():301 - Importing 'Atlas24' with guid: '16274244672647147715'
[2024/11/19 09:40:57] (DEBUG) PoolService.import_on_boot_impl():313 - Done importing 'Atlas24' with guid '16274244672647147715'
[2024/11/19 09:40:59] (DEBUG) PoolService.import_on_boot_impl():301 - Importing 'Playground' with guid: '13872113668859297037'
[2024/11/19 09:40:59] (ERROR) PoolService.import_on_boot_impl():304 - Failed to import 'Playground' with guid: '13872113668859297037' with error: "cannot import '13872113668859297037': no such pool available\n"
[2024/11/19 09:40:59] (DEBUG) PoolService.import_on_boot():479 - Calling pool.post_import
[2024/11/19 09:41:00] (DEBUG) PoolService.import_on_boot():481 - Finished calling pool.post_import

/dev/sdf1: LABEL="Atlas24" UUID="16274244672647147715" UUID_SUB="17959584022799965161" BLOCK_SIZE="4096" TYPE="zfs_member" PARTLABEL="data" PARTUUID="63d683a2-8537-4f04-a95d-e8421357c2a3"
/dev/nvme0n1p1: UUID_SUB="3912305205220024692" BLOCK_SIZE="4096" TYPE="zfs_member" PARTLABEL="data" PARTUUID="2965b230-3b0b-4fca-a8e6-6ef2a0a38cee"
/dev/sdd1: LABEL="Atlas24" UUID="16274244672647147715" UUID_SUB="4127816746491734963" BLOCK_SIZE="4096" TYPE="zfs_member" PARTLABEL="data" PARTUUID="5321db1f-318b-45f9-9433-c828654b06e6"
/dev/sde1: LABEL="Atlas24" UUID="16274244672647147715" UUID_SUB="2826184922222042215" BLOCK_SIZE="4096" TYPE="zfs_member" PARTLABEL="data" PARTUUID="4dc37a21-ead1-432d-a8c0-a0b7135339d0"
/dev/sdc2: LABEL_FATBOOT="EFI" LABEL="EFI" UUID="D1F9-5878" BLOCK_SIZE="512" TYPE="vfat" PARTUUID="da77cac9-7ffb-4133-8824-9f3e1e8d6744"
/dev/sdc3: LABEL="boot-pool" UUID="3044217680519236252" UUID_SUB="6080021228990201133" BLOCK_SIZE="4096" TYPE="zfs_member" PARTUUID="45b46821-583c-479d-96b7-a41ae28dd598"
/dev/sda2: LABEL_FATBOOT="EFI" LABEL="EFI" UUID="D1DE-0264" BLOCK_SIZE="512" TYPE="vfat" PARTUUID="aea4963c-a0e4-4f38-8a4b-b90266569b76"
/dev/sda3: LABEL="boot-pool" UUID="3044217680519236252" UUID_SUB="13813051174982159283" BLOCK_SIZE="4096" TYPE="zfs_member" PARTUUID="8b90d29b-e404-4873-8931-e885e72b39ea"
/dev/sdc1: PARTUUID="21d129d7-5904-4954-9414-01498b88b5a0"
/dev/sda1: PARTUUID="890a5cc2-1a32-478b-9c56-483e3a58752a"

NickF1227 · November 19, 2024, 7:47am

TrueNAS tried to import the pool but couldn’t find the disk.

[2024/11/19 08:27:45] (ERROR) PoolService.import_on_boot_impl():304 - Failed to import 'Playground' with guid: '13872113668859297037' with error: "cannot import '13872113668859297037': no such pool available\n"

In the output of blkid I don’t see the disk that has the label for the pool on any disk either.

Are you sure the disk is still plugged in? What does lsblk say?

99davide · November 19, 2024, 7:53am

In the meantime I rebooted the server, I went to the bios and the disk is detected there too. Anyway the disk is sdb

NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
sda           8:0    0 119.2G  0 disk 
├─sda1        8:1    0     1M  0 part 
├─sda2        8:2    0   512M  0 part 
└─sda3        8:3    0 118.7G  0 part 
sdb           8:16   0 232.9G  0 disk 
└─sdb1        8:17   0 232.9G  0 part 
sdc           8:32   0 119.2G  0 disk 
├─sdc1        8:33   0     1M  0 part 
├─sdc2        8:34   0   512M  0 part 
└─sdc3        8:35   0 118.7G  0 part 
sdd           8:48   1   3.6T  0 disk 
└─sdd1        8:49   1   3.6T  0 part 
sde           8:64   1   3.6T  0 disk 
└─sde1        8:65   1   3.6T  0 part 
sdf           8:80   0   3.6T  0 disk 
└─sdf1        8:81   0   3.6T  0 part 
nvme0n1     259:0    0 465.8G  0 disk 
└─nvme0n1p1 259:1    0 465.8G  0 part

I also updated the comments above, because the names had changed

bacon · November 19, 2024, 8:17am

Do I see it correctly that blkid is not seeing the partition /dev/sdb1?
That is the same symptom I had where blkid isn’t finding the ZFS partition.
I did end up destroying and recreating the pool.

Could you post the output of the following:

blkid --probe /dev/sdb
blkid --probe /dev/sdb1

(If the device name changed between reboots, please adjust accordingly).

99davide · November 19, 2024, 8:20am

root@ATLAS24[~]# blkid --probe /dev/sdb
/dev/sdb: PTUUID="3ca7476b-e674-4c03-ba1a-00600cb64076" PTTYPE="gpt"
root@ATLAS24[~]# blkid --probe /dev/sdb1
blkid: /dev/sdb1: ambivalent result (probably more filesystems on the device, use wipefs(8) to see more details)

bacon · November 19, 2024, 8:30am

Looks like blkid might still be picking up signatures from the NTFS file system. That is an issue, because zpool import uses that tool for discovery.

Not really ideal behaviour. Maybe we TrueNAS should wipe existing file system markers when adding a new disk.

This commands sounds super scary, but without options only displays the found file system marker (but make sure you have a backup):

sudo wipefs /dev/sdb1

99davide · November 19, 2024, 8:31am

root@ATLAS24[~]# wipefs /dev/sdb1
DEVICE OFFSET       TYPE       UUID                 LABEL
sdb1   0x52         vfat       4C9F-932B            
sdb1   0x0          vfat       4C9F-932B            
sdb1   0x1fe        vfat       4C9F-932B            
sdb1   0x3f000      zfs_member 13872113668859297037 Playground
sdb1   0x3e000      zfs_member 13872113668859297037 Playground
sdb1   0x3d000      zfs_member 13872113668859297037 Playground
sdb1   0x3c000      zfs_member 13872113668859297037 Playground
sdb1   0x3b000      zfs_member 13872113668859297037 Playground
sdb1   0x3a000      zfs_member 13872113668859297037 Playground
sdb1   0x39000      zfs_member 13872113668859297037 Playground
sdb1   0x38000      zfs_member 13872113668859297037 Playground
sdb1   0x37000      zfs_member 13872113668859297037 Playground
sdb1   0x36000      zfs_member 13872113668859297037 Playground
sdb1   0x35000      zfs_member 13872113668859297037 Playground
sdb1   0x34000      zfs_member 13872113668859297037 Playground
sdb1   0x33000      zfs_member 13872113668859297037 Playground
sdb1   0x32000      zfs_member 13872113668859297037 Playground
sdb1   0x31000      zfs_member 13872113668859297037 Playground
sdb1   0x30000      zfs_member 13872113668859297037 Playground
sdb1   0x2f000      zfs_member 13872113668859297037 Playground
sdb1   0x2e000      zfs_member 13872113668859297037 Playground
sdb1   0x2d000      zfs_member 13872113668859297037 Playground
sdb1   0x2c000      zfs_member 13872113668859297037 Playground
sdb1   0x2b000      zfs_member 13872113668859297037 Playground
sdb1   0x2a000      zfs_member 13872113668859297037 Playground
sdb1   0x29000      zfs_member 13872113668859297037 Playground
sdb1   0x28000      zfs_member 13872113668859297037 Playground
sdb1   0x27000      zfs_member 13872113668859297037 Playground
sdb1   0x26000      zfs_member 13872113668859297037 Playground
sdb1   0x25000      zfs_member 13872113668859297037 Playground
sdb1   0x24000      zfs_member 13872113668859297037 Playground
sdb1   0x23000      zfs_member 13872113668859297037 Playground
sdb1   0x7f000      zfs_member 13872113668859297037 Playground
sdb1   0x7e000      zfs_member 13872113668859297037 Playground
sdb1   0x7d000      zfs_member 13872113668859297037 Playground
sdb1   0x7c000      zfs_member 13872113668859297037 Playground
sdb1   0x7b000      zfs_member 13872113668859297037 Playground
sdb1   0x7a000      zfs_member 13872113668859297037 Playground
sdb1   0x79000      zfs_member 13872113668859297037 Playground
sdb1   0x78000      zfs_member 13872113668859297037 Playground
sdb1   0x77000      zfs_member 13872113668859297037 Playground
sdb1   0x76000      zfs_member 13872113668859297037 Playground
sdb1   0x75000      zfs_member 13872113668859297037 Playground
sdb1   0x74000      zfs_member 13872113668859297037 Playground
sdb1   0x73000      zfs_member 13872113668859297037 Playground
sdb1   0x72000      zfs_member 13872113668859297037 Playground
sdb1   0x71000      zfs_member 13872113668859297037 Playground
sdb1   0x70000      zfs_member 13872113668859297037 Playground
sdb1   0x6f000      zfs_member 13872113668859297037 Playground
sdb1   0x6e000      zfs_member 13872113668859297037 Playground
sdb1   0x6d000      zfs_member 13872113668859297037 Playground
sdb1   0x6c000      zfs_member 13872113668859297037 Playground
sdb1   0x6b000      zfs_member 13872113668859297037 Playground
sdb1   0x6a000      zfs_member 13872113668859297037 Playground
sdb1   0x69000      zfs_member 13872113668859297037 Playground
sdb1   0x68000      zfs_member 13872113668859297037 Playground
sdb1   0x67000      zfs_member 13872113668859297037 Playground
sdb1   0x66000      zfs_member 13872113668859297037 Playground
sdb1   0x65000      zfs_member 13872113668859297037 Playground
sdb1   0x64000      zfs_member 13872113668859297037 Playground
sdb1   0x63000      zfs_member 13872113668859297037 Playground
sdb1   0x62000      zfs_member 13872113668859297037 Playground
sdb1   0x61000      zfs_member 13872113668859297037 Playground
sdb1   0x60000      zfs_member 13872113668859297037 Playground
sdb1   0x3a389bf000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389be000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389bd000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389bc000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389bb000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ba000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b9000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b8000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b7000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b6000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b5000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b4000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b3000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b2000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b1000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b0000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389af000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ae000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ad000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ac000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ab000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389aa000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a9000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a8000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a7000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a6000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a5000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a4000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a3000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a2000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a1000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a0000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ff000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389fe000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389fd000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389fc000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389fb000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389fa000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f9000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f8000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f7000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f6000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f5000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f4000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f3000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f2000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f1000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f0000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ef000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ee000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ed000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ec000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389eb000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ea000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e9000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e8000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e7000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e6000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e5000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e4000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e3000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e2000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e1000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e0000 zfs_member 13872113668859297037 Playground

99davide · November 19, 2024, 8:48am

Ok, so now I should remove vfat, right? Could you guide me on how to do it?

bacon · November 19, 2024, 8:58am

I know the command to do it, not sure if it’s going to damage the pool. Please have a backup.

This should be run before importing the pool (i.e. after rebooting). It will clear the vfat labels. It does do a backup in the /root folder of any data it overwrites.

WARNING: Potentially Dangerous

sudo wipefs --backup --all -t vfat /dev/sdb1

Keep the output of that command in case anything goes wrong.

99davide · November 19, 2024, 9:01am

root@ATLAS24[~]# sudo wipefs --backup --all -t vfat /dev/sdb1
/dev/sdb1: 8 bytes were erased at offset 0x00000052 (vfat): 46 41 54 33 32 20 20 20
/dev/sdb1: 1 byte was erased at offset 0x00000000 (vfat): eb
/dev/sdb1: 2 bytes were erased at offset 0x000001fe (vfat): 55 aa

Ok, now?

99davide · November 19, 2024, 9:02am

root@ATLAS24[~]# wipefs /dev/sdb1                            
DEVICE OFFSET       TYPE       UUID                 LABEL
sdb1   0x3f000      zfs_member 13872113668859297037 Playground
sdb1   0x3e000      zfs_member 13872113668859297037 Playground
sdb1   0x3d000      zfs_member 13872113668859297037 Playground
sdb1   0x3c000      zfs_member 13872113668859297037 Playground
sdb1   0x3b000      zfs_member 13872113668859297037 Playground
sdb1   0x3a000      zfs_member 13872113668859297037 Playground
sdb1   0x39000      zfs_member 13872113668859297037 Playground
sdb1   0x38000      zfs_member 13872113668859297037 Playground
sdb1   0x37000      zfs_member 13872113668859297037 Playground
sdb1   0x36000      zfs_member 13872113668859297037 Playground
sdb1   0x35000      zfs_member 13872113668859297037 Playground
sdb1   0x34000      zfs_member 13872113668859297037 Playground
sdb1   0x33000      zfs_member 13872113668859297037 Playground
sdb1   0x32000      zfs_member 13872113668859297037 Playground
sdb1   0x31000      zfs_member 13872113668859297037 Playground
sdb1   0x30000      zfs_member 13872113668859297037 Playground
sdb1   0x2f000      zfs_member 13872113668859297037 Playground
sdb1   0x2e000      zfs_member 13872113668859297037 Playground
sdb1   0x2d000      zfs_member 13872113668859297037 Playground
sdb1   0x2c000      zfs_member 13872113668859297037 Playground
sdb1   0x2b000      zfs_member 13872113668859297037 Playground
sdb1   0x2a000      zfs_member 13872113668859297037 Playground
sdb1   0x29000      zfs_member 13872113668859297037 Playground
sdb1   0x28000      zfs_member 13872113668859297037 Playground
sdb1   0x27000      zfs_member 13872113668859297037 Playground
sdb1   0x26000      zfs_member 13872113668859297037 Playground
sdb1   0x25000      zfs_member 13872113668859297037 Playground
sdb1   0x24000      zfs_member 13872113668859297037 Playground
sdb1   0x23000      zfs_member 13872113668859297037 Playground
sdb1   0x7f000      zfs_member 13872113668859297037 Playground
sdb1   0x7e000      zfs_member 13872113668859297037 Playground
sdb1   0x7d000      zfs_member 13872113668859297037 Playground
sdb1   0x7c000      zfs_member 13872113668859297037 Playground
sdb1   0x7b000      zfs_member 13872113668859297037 Playground
sdb1   0x7a000      zfs_member 13872113668859297037 Playground
sdb1   0x79000      zfs_member 13872113668859297037 Playground
sdb1   0x78000      zfs_member 13872113668859297037 Playground
sdb1   0x77000      zfs_member 13872113668859297037 Playground
sdb1   0x76000      zfs_member 13872113668859297037 Playground
sdb1   0x75000      zfs_member 13872113668859297037 Playground
sdb1   0x74000      zfs_member 13872113668859297037 Playground
sdb1   0x73000      zfs_member 13872113668859297037 Playground
sdb1   0x72000      zfs_member 13872113668859297037 Playground
sdb1   0x71000      zfs_member 13872113668859297037 Playground
sdb1   0x70000      zfs_member 13872113668859297037 Playground
sdb1   0x6f000      zfs_member 13872113668859297037 Playground
sdb1   0x6e000      zfs_member 13872113668859297037 Playground
sdb1   0x6d000      zfs_member 13872113668859297037 Playground
sdb1   0x6c000      zfs_member 13872113668859297037 Playground
sdb1   0x6b000      zfs_member 13872113668859297037 Playground
sdb1   0x6a000      zfs_member 13872113668859297037 Playground
sdb1   0x69000      zfs_member 13872113668859297037 Playground
sdb1   0x68000      zfs_member 13872113668859297037 Playground
sdb1   0x67000      zfs_member 13872113668859297037 Playground
sdb1   0x66000      zfs_member 13872113668859297037 Playground
sdb1   0x65000      zfs_member 13872113668859297037 Playground
sdb1   0x64000      zfs_member 13872113668859297037 Playground
sdb1   0x63000      zfs_member 13872113668859297037 Playground
sdb1   0x62000      zfs_member 13872113668859297037 Playground
sdb1   0x61000      zfs_member 13872113668859297037 Playground
sdb1   0x60000      zfs_member 13872113668859297037 Playground
sdb1   0x3a389bf000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389be000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389bd000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389bc000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389bb000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ba000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b9000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b8000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b7000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b6000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b5000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b4000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b3000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b2000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b1000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389b0000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389af000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ae000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ad000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ac000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ab000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389aa000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a9000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a8000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a7000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a6000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a5000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a4000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a3000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a2000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a1000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389a0000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ff000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389fe000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389fd000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389fc000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389fb000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389fa000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f9000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f8000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f7000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f6000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f5000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f4000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f3000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f2000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f1000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389f0000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ef000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ee000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ed000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ec000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389eb000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389ea000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e9000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e8000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e7000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e6000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e5000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e4000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e3000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e2000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e1000 zfs_member 13872113668859297037 Playground
sdb1   0x3a389e0000 zfs_member 13872113668859297037 Playground

bacon · November 19, 2024, 9:06am

Try importing it and we will see.

The large signature 46 41 54 33 32 20 20 20 is fine to erase, that’s literally the ASCII text "FAT32 ". I do not like the single and two bytes signature.

99davide · November 19, 2024, 9:07am

I was reading a guide and they did this as the last command?
sudo dd if=/root/wipefs-md0-0x00000438.bak of=/dev/md0 seek=$((0x00000438)) bs=1 conv=notrunc
Don’t I have to do it? Obviously changing the hex values

bacon · November 19, 2024, 9:11am

That command is if you want to restore the data that was wiped by wipefs. It’s only necessary if something went wrong.

That’s a dangerous command (anything involving dd is dangerous). You’d also have to modify the output device (of) and the offset before using it.