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Re: [linux-lvm] Removing vg and lv after physical drive has been removed



Thanks. I ran the pvs command suggested but there was no details about
the elusive vg04 :-

# pvs -o +pv_uuid,lv_name 2>/dev/null
  PV         VG   Fmt  Attr PSize   PFree   PV UUID
            LV
  /dev/sda2  vg01 lvm2 a-   931.02g 407.02g
mamr70-L9Q1-wOHp-UrqM-CcEQ-hKQM-jIYn60 root
  /dev/sda2  vg01 lvm2 a-   931.02g 407.02g
mamr70-L9Q1-wOHp-UrqM-CcEQ-hKQM-jIYn60 swap
  /dev/sda2  vg01 lvm2 a-   931.02g 407.02g
mamr70-L9Q1-wOHp-UrqM-CcEQ-hKQM-jIYn60 vz
  /dev/sda2  vg01 lvm2 a-   931.02g 407.02g
mamr70-L9Q1-wOHp-UrqM-CcEQ-hKQM-jIYn60
  /dev/sdb2  vg02 lvm2 a-   931.02g      0
LBKTME-FNmD-mPMj-5r0d-MTJA-7A9S-icjpkQ root
  /dev/sdb2  vg02 lvm2 a-   931.02g      0
LBKTME-FNmD-mPMj-5r0d-MTJA-7A9S-icjpkQ swap
  /dev/sdb2  vg02 lvm2 a-   931.02g      0
LBKTME-FNmD-mPMj-5r0d-MTJA-7A9S-icjpkQ vz
  /dev/sdb2  vg02 lvm2 a-   931.02g      0
LBKTME-FNmD-mPMj-5r0d-MTJA-7A9S-icjpkQ vz2a
  /dev/sdc1  vg03 lvm2 a-   931.51g 127.51g
VCci0y-vIQv-A34L-zAk2-SIU8-cBnO-8NvFKg swap
  /dev/sdc1  vg03 lvm2 a-   931.51g 127.51g
VCci0y-vIQv-A34L-zAk2-SIU8-cBnO-8NvFKg vz
  /dev/sdc1  vg03 lvm2 a-   931.51g 127.51g
VCci0y-vIQv-A34L-zAk2-SIU8-cBnO-8NvFKg vz3a
  /dev/sdc1  vg03 lvm2 a-   931.51g 127.51g
VCci0y-vIQv-A34L-zAk2-SIU8-cBnO-8NvFKg
  /dev/sde1  vg05 lvm2 a-   931.51g      0
5r13FA-97ci-hZB2-54PL-DBmL-ClUP-ztzCua swap
  /dev/sde1  vg05 lvm2 a-   931.51g      0
5r13FA-97ci-hZB2-54PL-DBmL-ClUP-ztzCua vz


I'll have a look at dmsetup, but it seems to be a bit of a tricky
command that can cause all sorts of havoc.

This is a quite large OpenVZ production hardware node that takes
upwards to half an hour to reboot so I'd like to avoid this if at all
possible.


On Sun, Sep 2, 2012 at 6:13 AM, Scott Merrilees <scott merrilees net> wrote:
> I don't think the dumpconfig is particularly useful. as it only show
> lvm internal configuration.
> Much more useful would be something like the output of
>
> pvs -o +pv_uuid,lv_name 2>/dev/null
>
> as this would show the lvm disk configuration, and
>
> (pvs -o +pv_uuid,lv_name >/dev/null) 2>&1 | sort -u
>
> which  will show the unique errors.
>
> Another key question is can you reboot to fix, or do you have to fix online?
>
> Certainly you can do things in dmsetup, but you need to ensure a
> result that removes any persistent
> lvm disk configuration too, otherwise you will probably just get a
> same/similar problem on reboot.
> --
> Scott Merrilees
>
>
> On Sat, Sep 1, 2012 at 11:54 PM, Rene C. <openvz dokbua com> wrote:
>> We had a disk fail in a server and replaced it before removing the
>> drive from LVM.
>>
>> The server has 4 physical drives (PV's), each with it's own volume
>> group (VG). Each VG has 2 or more logical volumes (LV's.) Now LVM is
>> complaining about the missing drive. So we have a VG (vg04) with two
>> LV's that have become orphans than we need to clear out of the system.
>>
>> The problem is every time we run any LVM command we get some 'read
>> failed' errors. I've tried different commands to try to clear it out
>> but so far without luck:
>>
>> # lvscan
>>   /dev/vg04/swap: read failed after 0 of 4096 at 4294901760: Input/output error
>>   /dev/vg04/swap: read failed after 0 of 4096 at 4294959104: Input/output error
>>   /dev/vg04/swap: read failed after 0 of 4096 at 0: Input/output error
>>   /dev/vg04/swap: read failed after 0 of 4096 at 4096: Input/output error
>>   /dev/vg04/vz: read failed after 0 of 4096 at 995903864832: Input/output error
>>   /dev/vg04/vz: read failed after 0 of 4096 at 995903922176: Input/output error
>>   /dev/vg04/vz: read failed after 0 of 4096 at 0: Input/output error
>>   /dev/vg04/vz: read failed after 0 of 4096 at 4096: Input/output error
>>
>> # vgreduce vg04 --removemissing --force
>>   /dev/vg04/swap: read failed after 0 of 4096 at 4294901760: Input/output error
>>   /dev/vg04/swap: read failed after 0 of 4096 at 4294959104: Input/output error
>>   /dev/vg04/swap: read failed after 0 of 4096 at 0: Input/output error
>>   /dev/vg04/swap: read failed after 0 of 4096 at 4096: Input/output error
>>   /dev/vg04/vz: read failed after 0 of 4096 at 995903864832: Input/output error
>>   /dev/vg04/vz: read failed after 0 of 4096 at 995903922176: Input/output error
>>   /dev/vg04/vz: read failed after 0 of 4096 at 0: Input/output error
>>   /dev/vg04/vz: read failed after 0 of 4096 at 4096: Input/output error
>>   Volume group "vg04" not found
>>
>> # vgchange -a n /dev/vg04
>>   /dev/vg04/swap: read failed after 0 of 4096 at 4294901760: Input/output error
>>   /dev/vg04/swap: read failed after 0 of 4096 at 4294959104: Input/output error
>>   /dev/vg04/swap: read failed after 0 of 4096 at 0: Input/output error
>>   /dev/vg04/swap: read failed after 0 of 4096 at 4096: Input/output error
>>   /dev/vg04/vz: read failed after 0 of 4096 at 995903864832: Input/output error
>>   /dev/vg04/vz: read failed after 0 of 4096 at 995903922176: Input/output error
>>   /dev/vg04/vz: read failed after 0 of 4096 at 0: Input/output error
>>   /dev/vg04/vz: read failed after 0 of 4096 at 4096: Input/output error
>>   Volume group "vg04" not found
>>
>> # lvchange -a n /dev/vg04/vz
>>   /dev/vg04/swap: read failed after 0 of 4096 at 4294901760: Input/output error
>>   /dev/vg04/swap: read failed after 0 of 4096 at 4294959104: Input/output error
>>   /dev/vg04/swap: read failed after 0 of 4096 at 0: Input/output error
>>   /dev/vg04/swap: read failed after 0 of 4096 at 4096: Input/output error
>>   /dev/vg04/vz: read failed after 0 of 4096 at 995903864832: Input/output error
>>   /dev/vg04/vz: read failed after 0 of 4096 at 995903922176: Input/output error
>>   /dev/vg04/vz: read failed after 0 of 4096 at 0: Input/output error
>>   /dev/vg04/vz: read failed after 0 of 4096 at 4096: Input/output error
>>   Volume group "vg04" not found
>>   Skipping volume group vg04
>>
>> The missing VG and LV's are not important, we just want to remove them.
>>
>> I don't know if it's useful, but this is the output from 'lvm dumpconfig':
>>
>> # lvm dumpconfig
>>   devices {
>>         dir="/dev"
>>         scan="/dev"
>>         preferred_names=["^/dev/mpath/", "^/dev/mapper/mpath", "^/dev/[hs]d"]
>>         filter="a/.*/"
>>         cache_dir="/etc/lvm/cache"
>>         cache_file_prefix=""
>>         write_cache_state=1
>>         sysfs_scan=1
>>         md_component_detection=1
>>         md_chunk_alignment=1
>>         data_alignment_detection=1
>>         data_alignment=0
>>         data_alignment_offset_detection=1
>>         ignore_suspended_devices=0
>>         disable_after_error_count=0
>>         require_restorefile_with_uuid=1
>>   }
>>   dmeventd {
>>         mirror_library="libdevmapper-event-lvm2mirror.so"
>>         snapshot_library="libdevmapper-event-lvm2snapshot.so"
>>   }
>>   activation {
>>         udev_sync=1
>>         udev_rules=1
>>         missing_stripe_filler="error"
>>         reserved_stack=256
>>         reserved_memory=8192
>>         process_priority=-18
>>         mirror_region_size=512
>>         readahead="auto"
>>         mirror_log_fault_policy="allocate"
>>         mirror_image_fault_policy="remove"
>>         snapshot_autoextend_threshold=100
>>         snapshot_autoextend_percent=20
>>         use_mlockall=0
>>         monitoring=1
>>         polling_interval=15
>>   }
>>   global {
>>         umask=63
>>         test=0
>>         units="h"
>>         si_unit_consistency=1
>>         activation=1
>>         proc="/proc"
>>         locking_type=1
>>         wait_for_locks=1
>>         fallback_to_clustered_locking=1
>>         fallback_to_local_locking=1
>>         locking_dir="/var/lock/lvm"
>>         prioritise_write_locks=1
>>         abort_on_internal_errors=0
>>         metadata_read_only=0
>>   }
>>   shell {
>>         history_size=100
>>   }
>>   backup {
>>         backup=1
>>         backup_dir="/etc/lvm/backup"
>>         archive=1
>>         archive_dir="/etc/lvm/archive"
>>         retain_min=10
>>         retain_days=30
>>   }
>>   log {
>>         verbose=0
>>         syslog=1
>>         overwrite=0
>>         level=0
>>         indent=1
>>         command_names=0
>>         prefix="  "
>>   }
>> #
>>
>> Any hints appreciated!
>>
>> _______________________________________________
>> linux-lvm mailing list
>> linux-lvm redhat com
>> https://www.redhat.com/mailman/listinfo/linux-lvm
>> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm redhat com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/


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