Udiskctl on Kenno's Open Note

Deleting old LVM devices file PVID last seen not found

Thu, 26 Oct 2023 23:50:45 +1100

On one of my servers, I used to have a storage device, /dev/sdb, attached to it. That storage was used as an LVM physical volume. It has later been removed, and now I just noticed the following message:

[root@banan ~]# lvs
  Devices file PVID CuDRE3nMN5FMNqYLViHrnE1D7OFDlbX6 last seen on /dev/sdb not found.
  LV         VG        Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  root       almalinux -wi-ao---- <28.40g
  swap       almalinux -wi-ao----   2.01g

Based some research found online, there could be outdated device entries in the device files located in /etc/lvm/devices/system.devices.

Using ZFS on an External Drive

Thu, 12 Nov 2020 22:52:58 +1100

I’m a fan of ZFS filesystem. It’s so good that I also use ZFS on most my Linux machines, though it’s painful at time when the ZFS kernel modules fail to compile. Why I like it so much comparing to other file system such as XFS, EXT4, BTRFS? ZFS allows me to quickly do snapshots and efficiently send snapshots over the network, and my nas runs FreeBSD which support ZFS natively.

Create Disk Partition With GNU Parted

Wed, 20 May 2020 22:11:47 +1000

My favourite tool to create disk partitions on Linux is c[fg]disk. cfdisk used to create MBR based partition, and cgdisk is for GPT one.

Today, I want to learn to use another tool called GNU Parted.

After plugging an external disk, we can use udiskctl command to identify the disk device.

# udisksctl status
MODEL                     REVISION  SERIAL               DEVICE
--------------------------------------------------------------------------
Samsung SSD 850 EVO 250GB EMT01B6Q  S21MNXAG919308T      sda
ST2000DM001-1ER164        HP51      Z4Z46TMA             sdb
ST2000DM001-1ER164        HP51      Z4Z46W3E             sdc
Samsung SSD 850 EVO 250GB EMT01B6Q  S21MNXAG919312Y      sdd
Samsung SSD 840 EVO 250G  0309      533144424E4541443837343335324120 sde

The last Samsung SSD 840 (/dev/sde) is the one that I’m going to work with.