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Marking verified in the latest rpms. All stripe raid reshape attempts fail (not just raid5) when stacked below a thinpool _tdata volume.
kernel-4.18.0-184.el8 BUILT: Tue Feb 25 21:37:02 CST 2020
lvm2-2.03.08-2.el8 BUILT: Mon Feb 24 11:21:38 CST 2020
lvm2-libs-2.03.08-2.el8 BUILT: Mon Feb 24 11:21:38 CST 2020
device-mapper-1.02.169-2.el8 BUILT: Mon Feb 24 11:21:38 CST 2020
device-mapper-libs-1.02.169-2.el8 BUILT: Mon Feb 24 11:21:38 CST 2020
device-mapper-event-1.02.169-2.el8 BUILT: Mon Feb 24 11:21:38 CST 2020
device-mapper-event-libs-1.02.169-2.el8 BUILT: Mon Feb 24 11:21:38 CST 2020
[root@hayes-03 ~]# lvcreate -n pool_r4 --type raid4 --stripes=4 -L900M raid_vg
Using default stripesize 64.00 KiB.
Rounding size 900.00 MiB (225 extents) up to stripe boundary size 912.00 MiB(228 extents).
Logical volume "pool_r4" created.
[root@hayes-03 ~]# lvcreate -n pool_r5 --type raid5 --stripes=4 -L900M raid_vg
Using default stripesize 64.00 KiB.
Rounding size 900.00 MiB (225 extents) up to stripe boundary size 912.00 MiB(228 extents).
Logical volume "pool_r5" created.
[root@hayes-03 ~]# lvcreate -n pool_r6 --type raid6 --stripes=4 -L900M raid_vg
Using default stripesize 64.00 KiB.
Rounding size 900.00 MiB (225 extents) up to stripe boundary size 912.00 MiB(228 extents).
Logical volume "pool_r6" created.
[root@hayes-03 ~]# lvcreate -n pool_r10 --type raid10 --stripes=4 -L900M raid_vg
Using default stripesize 64.00 KiB.
Rounding size 900.00 MiB (225 extents) up to stripe boundary size 912.00 MiB(228 extents).
Logical volume "pool_r10" created.
[root@hayes-03 ~]# lvs -o +segtype
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Type
pool_r0 raid_vg rwi-a-r--- 912.00m raid0
pool_r10 raid_vg rwi-a-r--- 912.00m 100.00 raid10
pool_r4 raid_vg rwi-a-r--- 912.00m 100.00 raid4
pool_r5 raid_vg rwi-a-r--- 912.00m 100.00 raid5
pool_r6 raid_vg rwi-a-r--- 912.00m 100.00 raid6
# plus meta volumes
[root@hayes-03 ~]# lvs -o +segtype
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Type
pool_r0 raid_vg rwi-a-r--- 912.00m raid0
pool_r10 raid_vg rwi-a-r--- 912.00m 100.00 raid10
pool_r4 raid_vg rwi-a-r--- 912.00m 100.00 raid4
pool_r5 raid_vg rwi-a-r--- 912.00m 100.00 raid5
pool_r6 raid_vg rwi-a-r--- 912.00m 100.00 raid6
poolmeta0 raid_vg -wi-a----- 12.00m linear
poolmeta10 raid_vg -wi-a----- 12.00m linear
poolmeta4 raid_vg -wi-a----- 12.00m linear
poolmeta5 raid_vg -wi-a----- 12.00m linear
poolmeta6 raid_vg -wi-a----- 12.00m linear
[root@hayes-03 ~]# lvconvert --thinpool raid_vg/pool_r0 --poolmetadata poolmeta0
Thin pool volume with chunk size 64.00 KiB can address at most 15.81 TiB of data.
WARNING: Converting raid_vg/pool_r0 and raid_vg/poolmeta0 to thin pool's data and metadata volumes with metadata wiping.
THIS WILL DESTROY CONTENT OF LOGICAL VOLUME (filesystem etc.)
Do you really want to convert raid_vg/pool_r0 and raid_vg/poolmeta0? [y/n]: y
Converted raid_vg/pool_r0 and raid_vg/poolmeta0 to thin pool.
[root@hayes-03 ~]# lvconvert --thinpool raid_vg/pool_r4 --poolmetadata poolmeta4
Thin pool volume with chunk size 64.00 KiB can address at most 15.81 TiB of data.
WARNING: Converting raid_vg/pool_r4 and raid_vg/poolmeta4 to thin pool's data and metadata volumes with metadata wiping.
THIS WILL DESTROY CONTENT OF LOGICAL VOLUME (filesystem etc.)
Do you really want to convert raid_vg/pool_r4 and raid_vg/poolmeta4? [y/n]: y
Converted raid_vg/pool_r4 and raid_vg/poolmeta4 to thin pool.
[root@hayes-03 ~]# lvconvert --thinpool raid_vg/pool_r5 --poolmetadata poolmeta5
Thin pool volume with chunk size 64.00 KiB can address at most 15.81 TiB of data.
WARNING: Converting raid_vg/pool_r5 and raid_vg/poolmeta5 to thin pool's data and metadata volumes with metadata wiping.
THIS WILL DESTROY CONTENT OF LOGICAL VOLUME (filesystem etc.)
Do you really want to convert raid_vg/pool_r5 and raid_vg/poolmeta5? [y/n]: y
Converted raid_vg/pool_r5 and raid_vg/poolmeta5 to thin pool.
[root@hayes-03 ~]# lvconvert --thinpool raid_vg/pool_r6 --poolmetadata poolmeta6
Thin pool volume with chunk size 64.00 KiB can address at most 15.81 TiB of data.
WARNING: Converting raid_vg/pool_r6 and raid_vg/poolmeta6 to thin pool's data and metadata volumes with metadata wiping.
THIS WILL DESTROY CONTENT OF LOGICAL VOLUME (filesystem etc.)
Do you really want to convert raid_vg/pool_r6 and raid_vg/poolmeta6? [y/n]: y
Converted raid_vg/pool_r6 and raid_vg/poolmeta6 to thin pool.
[root@hayes-03 ~]# lvconvert --thinpool raid_vg/pool_r10 --poolmetadata poolmeta10
Thin pool volume with chunk size 64.00 KiB can address at most 15.81 TiB of data.
WARNING: Converting raid_vg/pool_r10 and raid_vg/poolmeta10 to thin pool's data and metadata volumes with metadata wiping.
THIS WILL DESTROY CONTENT OF LOGICAL VOLUME (filesystem etc.)
Do you really want to convert raid_vg/pool_r10 and raid_vg/poolmeta10? [y/n]: y
Converted raid_vg/pool_r10 and raid_vg/poolmeta10 to thin pool.
[root@hayes-03 ~]# lvs -o +segtype
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Type
pool_r0 raid_vg twi-a-tz-- 912.00m 0.00 10.29 thin-pool
pool_r10 raid_vg twi-a-tz-- 912.00m 0.00 10.29 thin-pool
pool_r4 raid_vg twi-a-tz-- 912.00m 0.00 10.29 thin-pool
pool_r5 raid_vg twi-a-tz-- 912.00m 0.00 10.29 thin-pool
pool_r6 raid_vg twi-a-tz-- 912.00m 0.00 10.29 thin-pool
# Reshape fails on *all* types of striped raids
[root@hayes-03 ~]# lvconvert raid_vg/pool_r0_tdata --stripes=5 --yes
Command on LV raid_vg/pool_r0_tdata with invalid LV type striped.
Command not permitted on LV raid_vg/pool_r0_tdata.
[root@hayes-03 ~]# lvconvert raid_vg/pool_r4_tdata --stripes=5 --yes
Using default stripesize 64.00 KiB.
Unable to convert stacked volume raid_vg/pool_r4_tdata.
Reshape request failed on LV raid_vg/pool_r4_tdata.
[root@hayes-03 ~]# lvconvert raid_vg/pool_r5_tdata --stripes=5 --yes
Using default stripesize 64.00 KiB.
Unable to convert stacked volume raid_vg/pool_r5_tdata.
Reshape request failed on LV raid_vg/pool_r5_tdata.
[root@hayes-03 ~]# lvconvert raid_vg/pool_r6_tdata --stripes=5 --yes
Using default stripesize 64.00 KiB.
Unable to convert stacked volume raid_vg/pool_r6_tdata.
Reshape request failed on LV raid_vg/pool_r6_tdata.
[root@hayes-03 ~]# lvconvert raid_vg/pool_r10_tdata --stripes=5 --yes
Using default stripesize 64.00 KiB.
Unable to convert stacked volume raid_vg/pool_r10_tdata.
Reshape request failed on LV raid_vg/pool_r10_tdata.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHEA-2020:1881