[linux-lvm] lvm2 raid volumes

[Steve Dainard]

Hello,

What are the methods for checking/monitoring a RAID LV?

The Cpy%Sync field seems promising here:

# lvs
  LV    VG           Attr       LSize   Pool Origin Data%  Meta%  Move Log
Cpy%Sync Convert
  raid1 test         rwi-aor--- 100.00m
 100.00
  raid6 test         rwi-aor--- 108.00m
 100.00

# pvs
  PV         VG           Fmt  Attr PSize    PFree
  /dev/vdb   test         lvm2 a--  1020.00m 876.00m
  /dev/vdc   test         lvm2 a--  1020.00m 876.00m
  /dev/vdd   test         lvm2 a--  1020.00m 980.00m
  /dev/vde   test         lvm2 a--  1020.00m 980.00m
  /dev/vdf   test         lvm2 a--  1020.00m 980.00m

But testing in a VM by removing a disk does not change the output of lvs:

# pvs
  WARNING: Device for PV S5xFZ7-mLaH-GNQP-ujWh-Zbkt-Ww3u-J0aKUJ not found
or rejected by a filter.
  PV             VG           Fmt  Attr PSize    PFree
  /dev/vdb       test         lvm2 a--  1020.00m 876.00m
  /dev/vdc       test         lvm2 a--  1020.00m 876.00m
  /dev/vdd       test         lvm2 a--  1020.00m 980.00m
  /dev/vde       test         lvm2 a--  1020.00m 980.00m
  unknown device test         lvm2 a-m  1020.00m 980.00m

# lvs
  WARNING: Device for PV S5xFZ7-mLaH-GNQP-ujWh-Zbkt-Ww3u-J0aKUJ not found
or rejected by a filter.
  LV    VG           Attr       LSize   Pool Origin Data%  Meta%  Move Log
Cpy%Sync Convert
  raid1 test         rwi-aor--- 100.00m
 100.00
  raid6 test         rwi-aor-p- 108.00m
 100.00


My end goal is to write a nagios check to monitor for disk failures.

Thanks,
Steve
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