I tested a disk partitioning scheme on Virtualbox using Ubuntu 18.04 before reinstalling my laptop. Hind sight now has taught me that I should've repeated the exercise with 20.04 when it came out rather than assuming 20.04 would be the same or better than 18.04 in this regard.
I'm trying to work out why an LV is recorded as inactive when booting (either post install or from a live USB stick). My hunch is that raid0 volumes aren't activated on boot for some weird reason, bug or more likely I'm missing a module that should be loaded by initramfs. I've used LVM for years, but never really played with the built in raid and cache features so I'm looking for advice on how best to troubleshoot this.
Some of the things I've looked at:
- journalctl -b
- Shows fsck timing out
- Shows a 60 to 90 second boot delay due to this, even if the partition isn't root or home. Fix is to set noauto in fstab and do a lvchange -ay <vg/lv> && mount <mountpoint> in rc.local. Which only works for data mounts but not for something like /home.
- inspect dmesg and /var/log/syslog
- Haven't provided me with antyhing clear cut either above the boot journal
- [update] If I remove the raid0 cache volume and add a single disk (linear) cache then the lv_home volume is activated on boot.
- My conclusion is that currently activating raid0 on boot is broken as I've had issues with simple raid0 volumes and ones used as SSD cache.
- I'll attempt dmadm raid 0 with LVM on top, this judging my the many articles online appears to be the more mature solution.
Some output:
After boot
lvscan
Code:
root@ubuntu:/home/ubuntu# lvscan
ACTIVE '/dev/vg_ml1/lv_swap1' [32.00 GiB] inherit
ACTIVE '/dev/vg_ml1/lv_swap2' [32.00 GiB] inherit
ACTIVE '/dev/vg_ml1/lv_root' [100.00 GiB] inherit
inactive '/dev/vg_ml1/lv_home' [931.51 GiB] inherit
ACTIVE '/dev/vg_ml1/lv_home_ssd' [300.00 GiB] inherit
lvscan -a
Code:
root@ubuntu:/home/ubuntu# lvscan -a
ACTIVE '/dev/vg_ml1/lv_swap1' [32.00 GiB] inherit
ACTIVE '/dev/vg_ml1/lv_swap2' [32.00 GiB] inherit
ACTIVE '/dev/vg_ml1/lv_root' [100.00 GiB] inherit
inactive '/dev/vg_ml1/lv_home' [931.51 GiB] inherit
ACTIVE '/dev/vg_ml1/lv_home_ssd' [300.00 GiB] inherit
inactive '/dev/vg_ml1/lv_cache_cpool' [64.00 GiB] inherit
inactive '/dev/vg_ml1/lv_cache_cpool_cdata' [64.00 GiB] inherit
inactive '/dev/vg_ml1/lv_cache_cpool_cmeta' [64.00 MiB] inherit
ACTIVE '/dev/vg_ml1/lv_root_rimage_0' [100.00 GiB] inherit
ACTIVE '/dev/vg_ml1/lv_root_rmeta_0' [4.00 MiB] inherit
ACTIVE '/dev/vg_ml1/lv_root_rimage_1' [100.00 GiB] inherit
ACTIVE '/dev/vg_ml1/lv_root_rmeta_1' [4.00 MiB] inherit
inactive '/dev/vg_ml1/lv_cache_cpool_cdata_rimage_0' [32.00 GiB] inherit
inactive '/dev/vg_ml1/lv_cache_cpool_cdata_rimage_1' [32.00 GiB] inherit
inactive '/dev/vg_ml1/lv_cache_cpool_cmeta_rimage_0' [32.00 MiB] inherit
inactive '/dev/vg_ml1/lv_cache_cpool_cmeta_rimage_1' [32.00 MiB] inherit
ACTIVE '/dev/vg_ml1/lv_home_ssd_rimage_0' [300.00 GiB] inherit
ACTIVE '/dev/vg_ml1/lv_home_ssd_rmeta_0' [4.00 MiB] inherit
ACTIVE '/dev/vg_ml1/lv_home_ssd_rimage_1' [300.00 GiB] inherit
ACTIVE '/dev/vg_ml1/lv_home_ssd_rmeta_1' [4.00 MiB] inherit
inactive '/dev/vg_ml1/lvol0_pmspare' [64.00 MiB] inherit
inactive '/dev/vg_ml1/lv_home_corig' [931.51 GiB] inherit
lsblk
Code:
root@ubuntu:/home/ubuntu# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 1.9G 1 loop /rofs
loop1 7:1 0 27.1M 1 loop /snap/snapd/7264
loop2 7:2 0 55M 1 loop /snap/core18/1705
loop3 7:3 0 240.8M 1 loop /snap/gnome-3-34-1804/24
loop4 7:4 0 62.1M 1 loop /snap/gtk-common-themes/1506
loop5 7:5 0 49.8M 1 loop /snap/snap-store/433
sda 8:0 0 465.8G 0 disk
├─sda1 8:1 0 512M 0 part
└─sda2 8:2 0 465.3G 0 part
├─vg_ml1-lv_swap1 253:0 0 32G 0 lvm
├─vg_ml1-lv_root_rmeta_0 253:2 0 4M 0 lvm
│ └─vg_ml1-lv_root 253:6 0 100G 0 lvm /media/ubuntu/9d8b9ddf-da93-40e3-a1d8-6c32dcce5966
├─vg_ml1-lv_root_rimage_0 253:3 0 100G 0 lvm
│ └─vg_ml1-lv_root 253:6 0 100G 0 lvm /media/ubuntu/9d8b9ddf-da93-40e3-a1d8-6c32dcce5966
├─vg_ml1-lv_home_ssd_rmeta_0 253:7 0 4M 0 lvm
│ └─vg_ml1-lv_home_ssd 253:11 0 300G 0 lvm
└─vg_ml1-lv_home_ssd_rimage_0 253:8 0 300G 0 lvm
└─vg_ml1-lv_home_ssd 253:11 0 300G 0 lvm
sdb 8:16 0 477G 0 disk
├─sdb1 8:17 0 512M 0 part
└─sdb2 8:18 0 476.4G 0 part
├─vg_ml1-lv_swap2 253:1 0 32G 0 lvm
├─vg_ml1-lv_root_rmeta_1 253:4 0 4M 0 lvm
│ └─vg_ml1-lv_root 253:6 0 100G 0 lvm /media/ubuntu/9d8b9ddf-da93-40e3-a1d8-6c32dcce5966
├─vg_ml1-lv_root_rimage_1 253:5 0 100G 0 lvm
│ └─vg_ml1-lv_root 253:6 0 100G 0 lvm /media/ubuntu/9d8b9ddf-da93-40e3-a1d8-6c32dcce5966
├─vg_ml1-lv_home_ssd_rmeta_1 253:9 0 4M 0 lvm
│ └─vg_ml1-lv_home_ssd 253:11 0 300G 0 lvm
└─vg_ml1-lv_home_ssd_rimage_1 253:10 0 300G 0 lvm
└─vg_ml1-lv_home_ssd 253:11 0 300G 0 lvm
sdc 8:32 0 931.5G 0 disk
sdd 8:48 1 28.9G 0 disk
├─sdd1 8:49 1 2.5G 0 part /cdrom
├─sdd2 8:50 1 3.9M 0 part
└─sdd3 8:51 1 26.3G 0 part /var/crash
lvs -a
Code:
root@ubuntu:/home/ubuntu# lvs -a
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
[lv_cache_cpool] vg_ml1 Cwi---C--- 64.00g
[lv_cache_cpool_cdata] vg_ml1 Cwi---r--- 64.00g
[lv_cache_cpool_cdata_rimage_0] vg_ml1 Iwi---r--- 32.00g
[lv_cache_cpool_cdata_rimage_1] vg_ml1 Iwi---r--- 32.00g
[lv_cache_cpool_cmeta] vg_ml1 ewi---r--- 64.00m
[lv_cache_cpool_cmeta_rimage_0] vg_ml1 Iwi---r--- 32.00m
[lv_cache_cpool_cmeta_rimage_1] vg_ml1 Iwi---r--- 32.00m
lv_home vg_ml1 Cwi---C--- 931.51g [lv_cache_cpool] [lv_home_corig]
[lv_home_corig] vg_ml1 owi---C--- 931.51g
lv_home_ssd vg_ml1 rwi-a-r--- 300.00g 100.00
[lv_home_ssd_rimage_0] vg_ml1 iwi-aor--- 300.00g
[lv_home_ssd_rimage_1] vg_ml1 iwi-aor--- 300.00g
[lv_home_ssd_rmeta_0] vg_ml1 ewi-aor--- 4.00m
[lv_home_ssd_rmeta_1] vg_ml1 ewi-aor--- 4.00m
lv_root vg_ml1 rwi-aor--- 100.00g 100.00
[lv_root_rimage_0] vg_ml1 iwi-aor--- 100.00g
[lv_root_rimage_1] vg_ml1 iwi-aor--- 100.00g
[lv_root_rmeta_0] vg_ml1 ewi-aor--- 4.00m
[lv_root_rmeta_1] vg_ml1 ewi-aor--- 4.00m
lv_swap1 vg_ml1 -wi-a----- 32.00g
lv_swap2 vg_ml1 -wi-a----- 32.00g
[lvol0_pmspare] vg_ml1 ewi------- 64.00m
lvdisplay for the LC in question
Code:
root@ubuntu:/home/ubuntu# lvdisplay vg_ml1/lv_home -m
--- Logical volume ---
LV Path /dev/vg_ml1/lv_home
LV Name lv_home
VG Name vg_ml1
LV UUID f0nKjr-xQOP-65PG-1MoR-nq8D-8ZID-lZlZno
LV Write Access read/write
LV Creation host, time djerk-W540, 2020-04-24 15:17:43 +0000
LV Status NOT available
LV Size 931.51 GiB
Current LE 238467
Segments 1
Allocation inherit
Read ahead sectors auto
--- Segments ---
Logical extents 0 to 238466:
Type cache
Chunk size 128.00 KiB
Metadata format 2
Mode writeback
Policy smq
After manually activating the LV
Activate the inactive LV
Code:
root@ubuntu:/home/ubuntu# lvchange -a y vg_ml1/lv_home
root@ubuntu:/home/ubuntu# lvs -a
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
[lv_cache_cpool] vg_ml1 Cwi---C--- 64.00g 99.99 9.68 0.00
[lv_cache_cpool_cdata] vg_ml1 Cwi-aor--- 64.00g
[lv_cache_cpool_cdata_rimage_0] vg_ml1 iwi-aor--- 32.00g
[lv_cache_cpool_cdata_rimage_1] vg_ml1 iwi-aor--- 32.00g
[lv_cache_cpool_cmeta] vg_ml1 ewi-aor--- 64.00m
[lv_cache_cpool_cmeta_rimage_0] vg_ml1 iwi-aor--- 32.00m
[lv_cache_cpool_cmeta_rimage_1] vg_ml1 iwi-aor--- 32.00m
lv_home vg_ml1 Cwi-a-C--- 931.51g [lv_cache_cpool] [lv_home_corig] 99.99 9.68 0.00
[lv_home_corig] vg_ml1 owi-aoC--- 931.51g
lv_home_ssd vg_ml1 rwi-a-r--- 300.00g 100.00
[lv_home_ssd_rimage_0] vg_ml1 iwi-aor--- 300.00g
[lv_home_ssd_rimage_1] vg_ml1 iwi-aor--- 300.00g
[lv_home_ssd_rmeta_0] vg_ml1 ewi-aor--- 4.00m
[lv_home_ssd_rmeta_1] vg_ml1 ewi-aor--- 4.00m
lv_root vg_ml1 rwi-aor--- 100.00g 100.00
[lv_root_rimage_0] vg_ml1 iwi-aor--- 100.00g
[lv_root_rimage_1] vg_ml1 iwi-aor--- 100.00g
[lv_root_rmeta_0] vg_ml1 ewi-aor--- 4.00m
[lv_root_rmeta_1] vg_ml1 ewi-aor--- 4.00m
lv_swap1 vg_ml1 -wi-a----- 32.00g
lv_swap2 vg_ml1 -wi-a----- 32.00g
[lvol0_pmspare] vg_ml1 ewi------- 64.00m
lvdisplay of activated LV
Code:
root@ubuntu:/home/ubuntu# lvdisplay vg_ml1/lv_home -m
--- Logical volume ---
LV Path /dev/vg_ml1/lv_home
LV Name lv_home
VG Name vg_ml1
LV UUID f0nKjr-xQOP-65PG-1MoR-nq8D-8ZID-lZlZno
LV Write Access read/write
LV Creation host, time djerk-W540, 2020-04-24 15:17:43 +0000
LV Cache pool name lv_cache_cpool
LV Cache origin name lv_home_corig
LV Status available
# open 0
LV Size 931.51 GiB
Cache used blocks 99.99%
Cache metadata blocks 9.68%
Cache dirty blocks 0.00%
Cache read hits/misses 940781 / 2998534
Cache wrt hits/misses 599453 / 3319518
Cache demotions 0
Cache promotions 0
Current LE 238467
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:19
--- Segments ---
Logical extents 0 to 238466:
Type cache
Chunk size 128.00 KiB
Metadata format 2
Mode writeback
Policy smq
lvs -a after LV activation
Code:
root@ubuntu:/home/ubuntu# lvs -a
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
[lv_cache_cpool] vg_ml1 Cwi---C--- 64.00g 99.99 9.68 0.00
[lv_cache_cpool_cdata] vg_ml1 Cwi-aor--- 64.00g
[lv_cache_cpool_cdata_rimage_0] vg_ml1 iwi-aor--- 32.00g
[lv_cache_cpool_cdata_rimage_1] vg_ml1 iwi-aor--- 32.00g
[lv_cache_cpool_cmeta] vg_ml1 ewi-aor--- 64.00m
[lv_cache_cpool_cmeta_rimage_0] vg_ml1 iwi-aor--- 32.00m
[lv_cache_cpool_cmeta_rimage_1] vg_ml1 iwi-aor--- 32.00m
lv_home vg_ml1 Cwi-a-C--- 931.51g [lv_cache_cpool] [lv_home_corig] 99.99 9.68 0.00
[lv_home_corig] vg_ml1 owi-aoC--- 931.51g
lv_home_ssd vg_ml1 rwi-a-r--- 300.00g 100.00
[lv_home_ssd_rimage_0] vg_ml1 iwi-aor--- 300.00g
[lv_home_ssd_rimage_1] vg_ml1 iwi-aor--- 300.00g
[lv_home_ssd_rmeta_0] vg_ml1 ewi-aor--- 4.00m
[lv_home_ssd_rmeta_1] vg_ml1 ewi-aor--- 4.00m
lv_root vg_ml1 rwi-aor--- 100.00g 100.00
[lv_root_rimage_0] vg_ml1 iwi-aor--- 100.00g
[lv_root_rimage_1] vg_ml1 iwi-aor--- 100.00g
[lv_root_rmeta_0] vg_ml1 ewi-aor--- 4.00m
[lv_root_rmeta_1] vg_ml1 ewi-aor--- 4.00m
lv_swap1 vg_ml1 -wi-a----- 32.00g
lv_swap2 vg_ml1 -wi-a----- 32.00g
[lvol0_pmspare] vg_ml1 ewi------- 64.00m
Checking the chunk size, read of a bug somewhere. I don't seem to be affected.
Code:
root@ubuntu:/home/ubuntu# lvs -o+chunksize
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Chunk
lv_home vg_ml1 Cwi-a-C--- 931.51g [lv_cache_cpool] [lv_home_corig] 99.99 9.68 0.00 128.00k
lv_home_ssd vg_ml1 rwi-a-r--- 300.00g 100.00 0
lv_root vg_ml1 rwi-aor--- 100.00g 100.00 0
lv_swap1 vg_ml1 -wi-a----- 32.00g 0
lv_swap2 vg_ml1 -wi-a----- 32.00g 0
root@ubuntu:/home/ubuntu# lvs -o name,cache_policy,cache_settings,chunk_size,cache_used_blocks,cache_dirty_blocks /dev/vg_ml1/lv_home
LV CachePolicy CacheSettings Chunk CacheUsedBlocks CacheDirtyBlocks
lv_home smq 128.00k 524282 0
Adv Reply
Originally Posted by slickymaster
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