[Bug 1868129] Re: I can't attach a writecache to LV

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: lvm2 (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1868129

Title:
  I can't attach a writecache to LV

Status in lvm2 package in Ubuntu:
  Confirmed

Bug description:
  #lvconvert --type writecache --cachesettings 'low_watermark=0 high_watermark=10 writeback_jobs=2048' --cachevol cache ssd/data
    WARNING: Unrecognised segment type writecache
    Invalid argument for --type: writecache
    Error during parsing of command line.

  I see that lvm2 package was build without key --with-
  writecache=internal

  #lvm version
    LVM version: 2.03.07(2) (2019-11-30)
    Library version: 1.02.167 (2019-11-30)
    Driver version: 4.41.0
    Configuration: ./configure --build=x86_64-linux-gnu --prefix=/usr --includedir=${prefix}/include --mandir=${prefix}/share/man --infodir=${prefix}/share/info --sysconfdir=/etc --localstatedir=/var --disable-silent-rules --libdir=${prefix}/lib/x86_64-linux-gnu --libexecdir=${prefix}/lib/x86_64-linux-gnu --runstatedir=/run --disable-maintainer-mode --disable-dependency-tracking --exec-prefix= --bindir=/bin --libdir=/lib/x86_64-linux-gnu --sbindir=/sbin --with-usrlibdir=/usr/lib/x86_64-linux-gnu --with-optimisation=-O2 --with-cache=internal --with-device-uid=0 --with-device-gid=6 --with-device-mode=0660 --with-default-pid-dir=/run --with-default-run-dir=/run/lvm --with-default-locking-dir=/run/lock/lvm --with-thin=internal --with-thin-check=/usr/sbin/thin_check --with-thin-dump=/usr/sbin/thin_dump --with-thin-repair=/usr/sbin/thin_repair --enable-applib --enable-blkid_wiping --enable-cmdlib --enable-dmeventd --enable-dbus-service --enable-lvmlockd-dlm --enable-lvmlockd-sanlock --enable-lvmpolld --enable-notify-dbus --enable-pkgconfig --enable-readline --enable-udev_rules --enable-udev_sync

  # lsmod | grep dm_writecache
  dm_writecache 36864 0

  #cat /etc/os-release
  NAME="Ubuntu"
  VERSION="20.04 LTS (Focal Fossa)"
  ID=ubuntu
  ID_LIKE=debian
  PRETTY_NAME="Ubuntu Focal Fossa (development branch)"
  VERSION_ID="20.04"
  HOME_URL="https://www.ubuntu.com/"
  SUPPORT_URL="https://help.ubuntu.com/"
  BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
  PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
  VERSION_CODENAME=focal
  UBUNTU_CODENAME=focal

  #uname -a
  Linux sw-sed-ubuntu 5.4.0-18-generic #22-Ubuntu SMP Sat Mar 7 18:13:06 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

  #apt info lvm2
  Package: lvm2
  Version: 2.03.07-1ubuntu1
  Priority: optional

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: lvm2 2.03.07-1ubuntu1
  ProcVersionSignature: Ubuntu 5.4.0-18.22-generic 5.4.24
  Uname: Linux 5.4.0-18-generic x86_64
  ApportVersion: 2.20.11-0ubuntu20
  Architecture: amd64
  Date: Thu Mar 19 16:06:17 2020
  InstallationDate: Installed on 2020-03-19 (0 days ago)
  InstallationMedia: Ubuntu-Server 20.04 LTS "Focal Fossa" - Alpha amd64 (20200317)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=C.UTF-8
   SHELL=/bin/bash
  SourcePackage: lvm2
  UpgradeStatus: No upgrade log present (probably fresh install)

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