On 12/5/18 8:34 PM, Gordon Messmer wrote:
I still can't reason why the lvm tools were scanning the component
volumes to begin with.
I think I've figured it out. The new lvm-tools package appears to have
broken support for detecting dm metadata version 0.90. The update
should be stable for anyone who did not upgrade from earlier versions of
CentOS. (I don't actually know when Anaconda last used 0.90 metadata)
On a working system with "verbose = 6" in lvm.conf:
# mdadm --detail /dev/md/primary
/dev/md/primary:
Version : 1.2
...
# pvs
...
#device/dev-io.c:609 Opened /dev/sda3 RO O_DIRECT
#device/dev-io.c:359 /dev/sda3: size is 1951133696 sectors
#device/dev-io.c:658 Closed /dev/sda3
#filters/filter-mpath.c:196 /dev/sda3: Device is a partition,
using primary device sda for mpath component detection
#device/dev-io.c:336 /dev/sda3: using cached size 1951133696 sectors
#device/dev-md.c:163 Found md magic number at offset 4096 of
/dev/sda3.
#filters/filter-md.c:108 /dev/sda3: Skipping md component device
...
On the broken system:
# mdadm --detail /dev/md/primary
/dev/md/primary:
Version : 0.90
...
# pvs
...
#device/dev-io.c:609 Opened /dev/sda3 RO O_DIRECT
#device/dev-io.c:359 /dev/sda3: size is 5858142208 sectors
#device/dev-io.c:658 Closed /dev/sda3
#filters/filter-mpath.c:196 /dev/sda3: Device is a partition,
using primary device sda for mpath component detection
#filters/filter-partitioned.c:30 filter partitioned deferred
/dev/sda3
#filters/filter-md.c:99 filter md deferred /dev/sda3
#filters/filter-persistent.c:346 filter caching good /dev/sda3
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