[DRBD-user] drbd Input/output error

Piotr Kloc pio at rdl.pl
Sun Feb 16 10:36:46 CET 2014

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


> Reading your infos, I understand that /dev/md2 is at the same time the 
> backing device of vg1 (pvdisplay recognizes md2 as a valid PV) and drbd1, 
> which is nonsense.
>I'd rather expect you put vg1 on top of drbd1, not md2, or you create 2 
>resources drbd1 and drbd2 that would use vg1-vm1 and vg1-vm2 as their 
>respective backing store.
> Drbd resources and pvs have their own metadata structures that potentially 
> overlap in your current configuration, so your problems I guess...
> Could you send us the results of vgdisplay -v vg1 to confirm this ?


I have created the volume group on /dev/drbd1
I think the command was   vgcreate vg1 /dev/drbd1

but now i see the vg1 is on /dev/md2 so it mess up :(


[root at wirt ~]#  vgdisplay -v vg1
    Using volume group(s) on command line
    Finding volume group "vg1"
  /dev/drbd1: read failed after 0 of 4096 at 1892425662464: Input/output 
error
  /dev/drbd1: read failed after 0 of 4096 at 1892425728000: Input/output 
error
  /dev/drbd1: read failed after 0 of 4096 at 0: Input/output error
  /dev/drbd1: read failed after 0 of 4096 at 4096: Input/output error
    /dev/drbd1: read failed after 0 of 4096 at 0: Input/output error
  --- Volume group ---
  VG Name               vg1
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  6
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               1.72 TiB
  PE Size               4.00 MiB
  Total PE              451189
  Alloc PE / Size       409600 / 1.56 TiB
  Free  PE / Size       41589 / 162.46 GiB
  VG UUID               TIp3Ii-v6u4-E23S-wELl-2PzS-CQ4S-zSaAwS

  --- Logical volume ---
  LV Path                /dev/vg1/vm1
  LV Name                vm1
  VG Name                vg1
  LV UUID                cQ47kS-QJHW-rVR8-3PC1-PDyD-r9md-SEwDtW
  LV Write Access        read/write
  LV Creation host, time wirt.feb.net.pl, 2013-12-17 21:41:19 +0100
  LV Status              available
  # open                 1
  LV Size                1.17 TiB
  Current LE             307200
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     512
  Block device           253:0

  --- Logical volume ---
  LV Path                /dev/vg1/vm2
  LV Name                vm2
  VG Name                vg1
  LV UUID                PHNzo5-y4UW-KUBT-9hcG-HsmE-5St4-KpGWK7
  LV Write Access        read/write
  LV Creation host, time wirt.feb.net.pl, 2014-02-15 00:09:53 +0100
  LV Status              available
  # open                 1
  LV Size                400.00 GiB
  Current LE             102400
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     512
  Block device           253:4

  --- Physical volumes ---
  PV Name               /dev/md2
  PV UUID               5i9EaO-fJKs-e10m-fr0i-0oC2-QaKm-OSel3f
  PV Status             allocatable
  Total PE / Free PE    451189 / 41589





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