Public bug reported:
#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)
** Affects: lvm2 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal uec-images
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https://bugs.launchpad.net/bugs/1868129
Title:
I can't attach a writecache to LV
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