------- Comment From [email protected] 2020-10-15 18:12 EDT-------
- Here some details about the file system configuration:

root@ilzlnx4:~# ls -ltr /etc/fstab
-rw-r--r-- 1 root root 714 Apr 28 23:41 /etc/fstab
root@ilzlnx4:~# cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/ubuntu-vg/ubuntu-lv during curtin installation
/dev/disk/by-id/dm-uuid-LVM-5yz7GrSzX0xczle6lEpuoNehgP8jjAaXjhz11sjRnmPN3ybPEJSlFz30ot8MHfZ0
 / ext4 defaults 0 0
# /boot was on /dev/dasda1 during curtin installation
/dev/disk/by-path/ccw-0.0.69d0-part1 /boot ext4 defaults 0 0
9.11.56.123:/PACKAGE /mnt/PACKAGE nfs noauto 0 0
9.11.56.123:/OS_IMAGE /mnt/OS_IMAGE nfs noauto 0 0

root@ilzlnx4:~# df
Filesystem                                    1K-blocks    Used Available Use% 
Mounted on
udev                                           16375040       0  16375040   0% 
/dev
tmpfs                                           3278112  304688   2973424  10% 
/run
/dev/mapper/ubuntu--vg-ubuntu--lv              20982320 9847296  10221312  50% /
tmpfs                                          16390540       0  16390540   0% 
/dev/shm
tmpfs                                              5120       0      5120   0% 
/run/lock
tmpfs                                          16390540       0  16390540   0% 
/sys/fs/cgroup
/dev/dasda1                                      999288  102616    827864  12% 
/boot
/dev/loop1                                        49024   49024         0 100% 
/snap/core18/1884
/dev/loop2                                        48640   48640         0 100% 
/snap/core18/1756
/dev/loop3                                       106752  106752         0 100% 
/snap/docker/470
/dev/loop6                                         1280    1280         0 100% 
/snap/stress-ng/5107
/dev/loop0                                        90496   90496         0 100% 
/snap/core/9990
/dev/loop5                                        28928   28928         0 100% 
/snap/snapd/9277
/dev/loop10                                        1280    1280         0 100% 
/snap/stress-ng/5132
/dev/loop8                                       106752  106752         0 100% 
/snap/docker/465
/dev/loop11                                       21248   21248         0 100% 
/snap/etcd/231
/dev/loop13                                       11392   11392         0 100% 
/snap/etcd/201
tmpfs                                           3278108      16   3278092   1% 
/run/user/0
/dev/mapper/36001738cfc900ced0000000000017766   6820416 6030504    440116  94% 
/fc/mapper/36001738cfc900ced0000000000017766
/dev/mapper/36001738cfc900ced0000000000017765   6820416 6030504    440116  94% 
/fc/mapper/36001738cfc900ced0000000000017765
/dev/mapper/36001738cfc900ced0000000000017764   6820416 6030504    440116  94% 
/fc/mapper/36001738cfc900ced0000000000017764
/dev/mapper/36001738cfc900ced0000000000017767   6820416 6030504    440116  94% 
/fc/mapper/36001738cfc900ced0000000000017767
/dev/mapper/36001738cfc900ced0000000000017768   6820416 6030504    440116  94% 
/fc/mapper/36001738cfc900ced0000000000017768
/dev/mapper/360050768108000664800000000000116  10255672 9069460    661924  94% 
/fc/mapper/360050768108000664800000000000116
/dev/mapper/360050768108000664800000000000114  10255672 9069460    661924  94% 
/fc/mapper/360050768108000664800000000000114
/dev/mapper/360050768108000664800000000000115  10255672 9069460    661924  94% 
/fc/mapper/360050768108000664800000000000115
/dev/mapper/360050768108000664800000000000112  10255672 9069460    661924  94% 
/fc/mapper/360050768108000664800000000000112
/dev/mapper/360050768108000664800000000000113  10255672 9069460    661924  94% 
/fc/mapper/360050768108000664800000000000113
tmpfs                                              1024       0      1024   0% 
/var/snap/lxd/common/ns
/dev/loop12                                       63488   63488         0 100% 
/media/root/disk
/dev/loop15                                       63488   63488         0 100% 
/snap/lxd/17627
/dev/loop14                                       29568   29568         0 100% 
/snap/snapd/9608
/dev/loop16                                       91264   91264         0 100% 
/snap/core/10127
/dev/loop4                                        63488   63488         0 100% 
/snap/lxd/17735

- /var/log is placed on a DASD disk

root@ilzlnx4:~# df -h /var/log
Filesystem                         Size  Used Avail Use% Mounted on
/dev/mapper/ubuntu--vg-ubuntu--lv   21G  9.4G  9.8G  50% /

root@ilzlnx4:~# lsdasd
Bus-ID    Status    Name      Device  Type         BlkSz  Size      Blocks
================================================================================
0.0.69d0  active    dasda     94:0    ECKD         4096   21912MB   5609520
0.0.69b0  active    dasdb     94:4    ECKD         4096   22694MB   5809860
0.0.69b1  active    dasdc     94:8    ECKD         4096   22694MB   5809860
0.0.69b2  active    dasdd     94:12   ECKD         4096   22694MB   5809860
0.0.69b3  active    dasde     94:16   ECKD         4096   22694MB   5809860
0.0.69d1  active    dasdf     94:20   ECKD         4096   21912MB   5609520
0.0.69d2  active    dasdg     94:24   ECKD         4096   21912MB   5609520
0.0.69d3  active    dasdh     94:28   ECKD         4096   21912MB   5609520
0.0.69d4  active    dasdi     94:32   ECKD         4096   21912MB   5609520
0.0.69d5  active    dasdj     94:36   ECKD         4096   21912MB   5609520

root@ilzlnx4:~# lsblk
NAME                                MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINT
loop0                                 7:0    0  88.3M  1 loop  /snap/core/9990
loop1                                 7:1    0  47.8M  1 loop  /snap/core18/1884
loop2                                 7:2    0  47.5M  1 loop  /snap/core18/1756
loop3                                 7:3    0 104.1M  1 loop  /snap/docker/470
loop4                                 7:4    0    62M  1 loop  /snap/lxd/17735
loop5                                 7:5    0  28.2M  1 loop  /snap/snapd/9277
loop6                                 7:6    0   1.2M  1 loop  
/snap/stress-ng/5107
loop8                                 7:8    0 104.2M  1 loop  /snap/docker/465
loop10                                7:10   0   1.2M  1 loop  
/snap/stress-ng/5132
loop11                                7:11   0  20.7M  1 loop  /snap/etcd/231
loop12                                7:12   0  61.9M  1 loop  /media/root/disk
loop13                                7:13   0  11.1M  1 loop  /snap/etcd/201
loop14                                7:14   0  28.8M  1 loop  /snap/snapd/9608
loop15                                7:15   0  61.9M  1 loop  /snap/lxd/17627
loop16                                7:16   0    89M  1 loop  /snap/core/10127
sda                                   8:0    0   6.7G  0 disk
????36001738cfc900ced0000000000017764 253:2    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017764
sdb                                   8:16   0   6.7G  0 disk
????36001738cfc900ced0000000000017764 253:2    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017764
sdc                                   8:32   0   6.7G  0 disk
????36001738cfc900ced0000000000017765 253:1    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017765
sdd                                   8:48   0   6.7G  0 disk
????36001738cfc900ced0000000000017765 253:1    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017765
sde                                   8:64   0    10G  0 disk
????360050768108000664800000000000112 253:3    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000112
sdf                                   8:80   0   6.7G  0 disk
????36001738cfc900ced0000000000017766 253:7    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017766
sdg                                   8:96   0    10G  0 disk
????360050768108000664800000000000112 253:3    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000112
sdh                                   8:112  0   6.7G  0 disk
????36001738cfc900ced0000000000017767 253:10   0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017767
sdi                                   8:128  0   6.7G  0 disk
????36001738cfc900ced0000000000017766 253:7    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017766
sdj                                   8:144  0    10G  0 disk
????360050768108000664800000000000112 253:3    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000112
sdk                                   8:160  0   6.7G  0 disk
????36001738cfc900ced0000000000017764 253:2    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017764
sdl                                   8:176  0   6.7G  0 disk
????36001738cfc900ced0000000000017768 253:6    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017768
sdm                                   8:192  0   6.7G  0 disk
????36001738cfc900ced0000000000017767 253:10   0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017767
sdn                                   8:208  0    10G  0 disk
????360050768108000664800000000000113 253:5    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000113
sdo                                   8:224  0    10G  0 disk
????360050768108000664800000000000113 253:5    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000113
sdp                                   8:240  0    10G  0 disk
????360050768108000664800000000000113 253:5    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000113
sdq                                  65:0    0   6.7G  0 disk
????36001738cfc900ced0000000000017765 253:1    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017765
sdr                                  65:16   0   6.7G  0 disk
????36001738cfc900ced0000000000017768 253:6    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017768
sds                                  65:32   0    10G  0 disk
????360050768108000664800000000000114 253:8    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000114
sdt                                  65:48   0    10G  0 disk
????360050768108000664800000000000114 253:8    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000114
sdu                                  65:64   0   6.7G  0 disk
????36001738cfc900ced0000000000017766 253:7    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017766
sdv                                  65:80   0    10G  0 disk
????360050768108000664800000000000114 253:8    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000114
sdw                                  65:96   0    10G  0 disk
????360050768108000664800000000000115 253:4    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000115
sdx                                  65:112  0    10G  0 disk
????360050768108000664800000000000115 253:4    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000115
sdy                                  65:128  0   6.7G  0 disk
????36001738cfc900ced0000000000017767 253:10   0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017767
sdz                                  65:144  0    10G  0 disk
????360050768108000664800000000000115 253:4    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000115
sdaa                                 65:160  0    10G  0 disk
????360050768108000664800000000000116 253:9    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000116

sdab                                 65:176  0    10G  0 disk
????360050768108000664800000000000116 253:9    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000116
sdac                                 65:192  0   6.7G  0 disk
????36001738cfc900ced0000000000017768 253:6    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017768
sdad                                 65:208  0    10G  0 disk
????360050768108000664800000000000116 253:9    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000116
sdae                                 65:224  0   6.7G  0 disk
????36001738cfc900ced0000000000017764 253:2    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017764
sdaf                                 65:240  0    10G  0 disk
????360050768108000664800000000000112 253:3    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000112
sdag                                 66:0    0   6.7G  0 disk
????36001738cfc900ced0000000000017765 253:1    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017765
sdah                                 66:16   0   6.7G  0 disk
????36001738cfc900ced0000000000017764 253:2    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017764
sdai                                 66:32   0   6.7G  0 disk
????36001738cfc900ced0000000000017764 253:2    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017764
sdaj                                 66:48   0    10G  0 disk
????360050768108000664800000000000113 253:5    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000113
sdak                                 66:64   0   6.7G  0 disk
????36001738cfc900ced0000000000017765 253:1    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017765
sdal                                 66:80   0   6.7G  0 disk
????36001738cfc900ced0000000000017766 253:7    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017766
sdam                                 66:96   0   6.7G  0 disk
????36001738cfc900ced0000000000017765 253:1    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017765
sdan                                 66:112  0    10G  0 disk
????360050768108000664800000000000114 253:8    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000114
sdao                                 66:128  0   6.7G  0 disk
????36001738cfc900ced0000000000017767 253:10   0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017767
sdap                                 66:144  0   6.7G  0 disk
????36001738cfc900ced0000000000017766 253:7    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017766
sdaq                                 66:160  0   6.7G  0 disk
????36001738cfc900ced0000000000017766 253:7    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017766
sdar                                 66:176  0   6.7G  0 disk
????36001738cfc900ced0000000000017767 253:10   0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017767
sdas                                 66:192  0   6.7G  0 disk
????36001738cfc900ced0000000000017768 253:6    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017768
sdat                                 66:208  0   6.7G  0 disk
????36001738cfc900ced0000000000017768 253:6    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017768
sdau                                 66:224  0   6.7G  0 disk
????36001738cfc900ced0000000000017767 253:10   0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017767
sdav                                 66:240  0    10G  0 disk
????360050768108000664800000000000115 253:4    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000115
sdaw                                 67:0    0   6.7G  0 disk
????36001738cfc900ced0000000000017768 253:6    0   6.7G  0 mpath 
/fc/mapper/36001738cfc900ced0000000000017768
sdax                                 67:16   0    10G  0 disk
????360050768108000664800000000000116 253:9    0    10G  0 mpath 
/fc/mapper/360050768108000664800000000000116
dasda                                94:0    0  21.4G  0 disk
????dasda1                             94:1    0     1G  0 part  /boot
????dasda2                             94:2    0  20.4G  0 part
????ubuntu--vg-ubuntu--lv           253:0    0  20.4G  0 lvm   /
dasdb                                94:4    0  22.2G  0 disk
????dasdb1                             94:5    0  22.2G  0 part
dasdc                                94:8    0  22.2G  0 disk
????dasdc1                             94:9    0  22.2G  0 part
dasdd                                94:12   0  22.2G  0 disk
????dasdd1                             94:13   0  22.2G  0 part
dasde                                94:16   0  22.2G  0 disk
????dasde1                             94:17   0  22.2G  0 part
dasdf                                94:20   0  21.4G  0 disk
????dasdf1                             94:21   0   200M  0 part
????dasdf2                             94:22   0     2G  0 part
????dasdf3                             94:23   0  19.2G  0 part
dasdg                                94:24   0  21.4G  0 disk
????dasdg1                             94:25   0     1G  0 part
????dasdg2                             94:26   0  20.4G  0 part
????rhel_ilzlnx5-swap               253:11   0   2.1G  0 lvm
????rhel_ilzlnx5-root               253:12   0  18.3G  0 lvm
dasdh                                94:28   0  21.4G  0 disk
????dasdh1                             94:29   0     1G  0 part
????dasdh2                             94:30   0  20.4G  0 part
????rhel_ilzlnx500-swap             253:13   0   2.1G  0 lvm
????rhel_ilzlnx500-root             253:14   0  18.3G  0 lvm
dasdi                                94:32   0  21.4G  0 disk
????dasdi1                             94:33   0   300M  0 part
????dasdi2                             94:34   0  21.1G  0 part
????system-root                     253:16   0  40.5G  0 lvm
dasdj                                94:36   0  21.4G  0 disk
????dasdj1                             94:37   0  21.4G  0 part
????system-swap                     253:15   0     2G  0 lvm
????system-root                     253:16   0  40.5G  0 lvm

- Only one DASD device is being as a boot LUN the rest of them are just
visible but not in use

- The second system presenting the problem is not an iSCSI system it is
a mix of DASD and SCSI FCP, the boot drive where the /var/syslog is
located is an SCSI FCP device

root@ilzlnx3:~# df -h /var/log
Filesystem                         Size  Used Avail Use% Mounted on
/dev/mapper/ubuntu--vg-ubuntu--lv   34G  7.0G   26G  22% /

sdai                                         66:32   0   50G  0 disk
??sdai1                                      66:33   0    1G  0 part
??sdai2                                      66:34   0   49G  0 part
??36005076400818089b0000000000001a6         253:8    0   50G  0 mpath
??36005076400818089b0000000000001a6-part1 253:10   0    1G  0 part  /boot
??36005076400818089b0000000000001a6-part2 253:11   0   49G  0 part
??ubuntu--vg-ubuntu--lv                 253:12   0   34G  0 lvm   /

root@ilzlnx3:~# sg_map -i -x | grep sdai
/dev/sg37  2 0 4 0  0  /dev/sdai  IBM       2145              0000

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https://bugs.launchpad.net/bugs/1896575

Title:
  [UBUNTU 20.04] syslog daemon stop running unexpectedly

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