cdg*_*gmn 5 linux lvm diskmanagement kvm-virtualization
这个问题出现在 CentOS 7 的 kvm/qemu 管理程序上，我们在其中托管多个虚拟机。
磁盘 /dev/sda(1918.2 GB) 是 raid6 LSI MEGARAID。
[root@mia3 ~]# fdisk -l
Disk /dev/sda: 1918.2 GB, 1918239768576 bytes, 3746562048 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x51549cd4
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1026047 512000 83 Linux
/dev/sda2 1026048 135243775 67108864 82 Linux swap / Solaris
/dev/sda3 135243776 449816575 157286400 83 Linux
/dev/sda4 449816576 3746562047 1648372736 8e Linux LVM
这是我们的磁盘配置：sda1 - /boot、sda2 - swap、sda3 - /（root）、sda4 - 我们的 LVM 的 PV，并为我们的 VM 进行精简配置。
断电后，根分区上的数据被损坏。我们必须重新安装操作系统才能启动服务器。我们没有触及 /dev/sda4 分区。在此之前，我们以救援模式挂载了根分区，并对 /etc/lvm/ 文件夹进行了备份。
重新安装 Centos 后，我们尝试使用 vgcfgrestore 恢复 LVM，但出现错误：
[root@mia3 ~]# vgcfgrestore -f /etc/lvm/backup/vg_kvm vg_kvm -v
No devices found.
/dev/sda4: Checksum error at offset 808960
Couldn't read volume group metadata from /dev/sda4.
Metadata location on /dev/sda4 at 808960 has invalid summary for VG.
Failed to read metadata summary from /dev/sda4
Failed to scan VG from /dev/sda4
Couldn't find device with uuid HNB35U-ilI4-WWAK-1Q4D-Netj-t68p-Po4vCT.
Consider using option --force to restore Volume Group vg_kvm with thin volumes.
Restore failed.
Scanning all devices to initialize lvmetad.
/dev/sda4: Checksum error at offset 808960
Couldn't read volume group metadata from /dev/sda4.
Metadata location on /dev/sda4 at 808960 has invalid summary for VG.
Failed to read metadata summary from /dev/sda4
Failed to scan VG from /dev/sda4
[root@mia3 ~]#
因此我们尝试重新添加 PV 并覆盖元数据，但没有成功：
[root@mia3 ~]# pvcreate -f /dev/sda4 --restorefile /root/lvm/backup/vg_kvm --uuid HNB35U-ilI4-WWAK-1Q4D-Netj-t68p-Po4vCT -vv
devices/global_filter not found in config: defaulting to global_filter = [ "a|.*/|" ]
global/lvmetad_update_wait_time not found in config: defaulting to 10
devices/filter not found in config: defaulting to filter = [ "a|.*/|" ]
devices/cache not found in config: defaulting to /etc/lvm/cache/.cache
metadata/record_lvs_history not found in config: defaulting to 0
File-based locking selected.
Couldn't find device with uuid HNB35U-ilI4-WWAK-1Q4D-Netj-t68p-Po4vCT.
Stack vg_kvm/lvpool:0[0] on LV vg_kvm/lvpool_tdata:0.
Adding vg_kvm/lvpool:0 as an user of vg_kvm/lvpool_tdata.
Adding vg_kvm/lvpool:0 as an user of vg_kvm/lvpool_tmeta.
Adding vg_kvm/vsv11999-dm9oryxunpw8po9p-1xwrkrotul6i5k3g:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12001-dmzdbquhkhrydlnf-kqjcbeyvz1c5xwun:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12034-dnadddzaxsxoq2rx-iwxjz6wr2vmqhsj3:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12036-dbgt9zilw2tg9sqd-c0xa9h1uxigjuqg9:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12037-dctrjirji3agbl9l-dtzyf8jrb8lip0m7:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12038-dm5mulwohkvz5ara-kccgnknpjdi11tdy:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12039-d1lnb9qcyjaqmodk-mnl22loaflo24kpm:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12040-daejvderic4uvccj-wjnydccgzohyaekq:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12046-dswief4uk4gthxa1-ie5s7up6vbf37p68:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12056-du7hvvsp3lw7jgja-uap8l1jpe29llrpu:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12080-dwydbngcjptnnryn-hzz0jimwfl6yau2x:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12094-d8cmko7aio2f1fyo-warkvewdzfeedme5:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12097-dllp7oepp4homdj9-jm6n2itmvy29k9xf:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12098-dcj6mnnidej8c80u-r3bkk3pfu8g9sf3o:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12103-dwtyfq1quemcij56-4rwivmmtzxwk1ydb:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12106-dngrxbyoapwac5sm-bstrvsbxzrztefob:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12107-dq3h0wgnzkasoles-hv12r8qmyobojubp:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12109-ddq6cmtow9qwuaka-v9a1omyljy0xujk4:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12110-dvaaktx2bng99yl9-f5xh28mlg7u3mo5r:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12111-db0wlufykbcbb2mp-dxhgxxmivthvqwwp:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12112-dyfnblgyajfpidqs-ny0xpnxhzfzwc1db:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12116-dowxexkxa0ygsgki-e4dih6xcnybtdgx2:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12117-dwd0weu8ig1dvukx-fly3n8dyseklhntv:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12118-dz9hbvnbtsihufm5-paqhexr1tuld8bnd:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12119-dof5n90vez6smo1j-h1xmccyzl7qotery:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12120-d9q0y85z4shpw64o-6zx5tmxhajpcxtkv:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12121-dac4vuig8akyryd0-0e4rf2snm04r5mdy:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12122-d99yza6ssbhxxkru-16ptyp8btexq6wkb:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12124-d4ud5tu2ueajr0vc-r9pv77cjusnjue21:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12126-dqjmtfzubhqvheij-blecac71kpwsmy62:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12127-d5sgcmdodjaqtvp9-oqbroobow5tzn0va:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12130-dtf7rf4suf8bov9t-8lb0agstvcpann2e:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12131-dwkveordvertdam3-3g4qwtf5ydhy0hug:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12134-dgpxbewt3xlkxlqb-j5ad04pt2fndqqmw:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12135-d55krjg3dotss3e4-dwbbjmo0shwwwzv2:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12138-dyz9yl6swxbaxfrj-1pgri05suzqyagqq:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12140-dykgcwqaauznoxrm-4ibft4womwuvpwkx:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12142-dwtlkzoke0a05u1o-rqxjogzuvjvfttxs:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12144-dn3gyu3uroppwgzg-wraejm2ynwnmtmd4:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12162-dalw90et3l9vbath-eo5womktdromb5sn:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12211-dyyizuuag0mz4eok-je7du6slil1jlfzp:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12329-d5xmlj2iqsuekgkm-cg6qplkwk48yiyeo:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12333-drqvvb7fktr4n52b-estbavvooqdljpvo:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12334-dbdf0lvefbgpqbxa-bmpnzainjdfvuavv:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12339-d3yfeg1upsfoxbd3-nbxbccudjdtcgztt:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12354-d1ctzl88dwv9znri-pzfp6weunhpdhvgn:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12361-dbug4gr7r8mbsnva-yamgras92xuqin66:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12088-dqphwqqeuwxtmm7y-4rurc6jm0lvcj57q:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12089-dbhimrcqvjkaxvxc-3vpljlh2xkojhb9e:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12090-dndlzsmpj8qgm2gb-wm4sg3d6n2cq3tpm:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12091-dyyxcz5cf4w4cu6z-gja2kph6egpjvyzh:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12092-dnllln6x7uud75ss-um9zelymhc04ohd6:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12442-dyf2cgwdgaluli0s-cahwc74lrstt61gl:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12456-dmiuo7guhru4snsf-yt55qun0wx5mtfkg:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12087-dxbtb8w1g3tx5akk-bdqcsnlathemkrig:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12234-dq82wyoapvxvh7zz-maaekbfd7h9ixks8:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12588-das5kos8qt1ziktl-aky0pxwg8ecv9b48:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12771-djaikmniei1vxia5-jhqasdwc763s3pmb:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12784-d3k6aplejbvjrlcw-uwo81r0wkmeiptso:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12139-dpnhdmg2odfabvfn-zqgiw42wfsgbbkrc:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12137-dxtiqptvdwcrrcwa-22fkxorf6hl44evf:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12866-d37htmu48aopiafv-sli9m0lt3dz0yeyl:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12096-dz9pfno05wqq8vbg-sq8i5na5z8lrnm6n:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12363-dtlh9w3tza99quoj-dlicfndz6e3pbfu0:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12890-dmaaydjldw3c13jk-iskdygh5pczveo3r:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12320-dqmecms9nep6muns-xmmkziafa8mz1hta:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12936-dhdfa36ovcdzfafp-ultnlmom4scugsw1:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12964-dctbp9xgo2gl8w6i-kbw9cinhoieea8av:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12984-dwqjvkqc3aznhb4o-criyexpxvdndoscq:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12143-d3s1toagczaiq4ma-oupwnk3eg27r41ze:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13019-d5yrsi5a58bdzalc-i6mbum8zthk2arhs:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13022-djszrasae5w7xegh-ehqsutbhrwd7qgsi:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13027-dq6pg99jd2fphljg-u15x8sonbwukaree:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12041-dlsmtmfa6fp4wcuc-bfhftkdhwfqa7sqb:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13039-djtjimojqi3iaufp-csbinqtsvebzzmqx:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13061-duocptl9qdtvwubp-feryqeejht4j24ql:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13064-dexwkomdh62by80s-aymbuetu6p0btn4d:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13076-drd4nrhy4u7fq1tn-f1kt8ubk2jch4ol3:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13082-ds9gjikqyg9nftua-rrhk4dlrr8cp3la7:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12759-du4yducr4ghi8eun-bzivqxabwaltaddm:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12123-dzb9rktypp0jqinx-adtlzed02wpccxoa:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13118-d0lj9gpvqfmox63i-9jstjcjkmemszrla:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13121-du0r39n6wvnrclox-bviz76ig9vvexota:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13133-d2fk6lg6bsppbkcs-hwk5bmsvqxa0y0bs:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13204-dl6hzsmswetitsb4-bais6lpjbbhfkexn:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13230-dtiyrmijg8mde5xy-vobukov1qxg8bx5j:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13254-d3sdhrrgcvbwrsyp-yxaozxmt3clqzxxc:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13271-drutw4ihq774xhs6-ecpwfmzcrqy0vvsm:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13266-dmuj5cfeu2hrgfxw-2tpflycnwoedyidb:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13380-d99ciziibe7rt3es-7fkh56myy79oushw:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13487-d30yxx4wgfxcb9te-chc2bxojs7tvcwz3:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13502-dc2oivdodzo94jj3-1qmpba9ti4zzbfeg:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13277-deudjco25w9cd3rv-re1ha5qkozses9i3:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12208-dfqhoqmtuwzktwqm-n9s5daovhtnyvyeh:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13481-dthcwgpolombhfed-dkmesvsvmt1vem0d:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13585-ddvwhm2vcqpq66uy-1brs98bctgr6bcq9:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13586-dadacaexxn8nkuy3-fyx8zp5mursbqhns:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13587-dc0fmskwdbkmz7mg-ra53wgfksiv7tsqk:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13569-dk6v0pyvz8eoohl5-qyndiwn8zriir75s:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13603-d66mz2amabmd63fj-rkcqmtvfnlfmywou:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13613-dykuo32mnkgf9nce-hhkhn118dhsedoc8:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13623-dksoizdtoglihaax-23o0zltutliyoo2q:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13629-dxbpqqernfvufxrz-iv6jujdxm78hxjbn:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13610-drrehnh36oipacdf-frnumdhlt823mntg:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13654-dmlnhhqilztxff5a-4gawkysgtkze4st7:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13669-dk3ukgidvj0l4x4x-9d3vfao5qejzecdn:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13672-d1r1608gu96b0ujo-nn7ejmxkbfce40m4:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13689-dhpzh8w7jlwi0zza-aqizb6tbeuk9k1ca:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12477-dejmu0gihtllnj97-gaxwgicndwp25unx:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13710-dv2bktawped5fz44-0bkdtrkp8tk2vynu:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12125-d5d9pebts1rue7jt-vwnkapewjkfszked:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13718-dmimkn9h1ax3t4am-8tdnpznya2reek8g:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13545-dzaq2rjqfiyf5azl-kw35xomndhltjnrs:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13723-daleipfjwu7zm7aj-s8jo6yhxwz4efl2y:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13726-dpdqvmnzkvxkiz4y-cfudhed6m12hnlmj:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12136-d0qvvamyx5qq1g6o-awtlh6pbotvlacyc:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13258-du2kuwgkwhypcfzz-i6h00rd0exzw4b69:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13755-dqglblzy3akyohph-wtev5tlrs5lkkejd:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13758-dhfrybljxildcky1-ktotkou3mpvxfjnq:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13759-dxqbq7phpjgoa1ed-dwtly1dkuorvlyli:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13762-di54bo3us4p8gefa-34s2uhcye1rbdbvw:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13767-dwtsyqxhqbp8fa9w-us8xvwm9q6nqkmzx:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13768-dadnlkrau2cwhlbd-cj8liz4hfolpmjfa:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13769-dt4nwlcmpfqyenob-jvpfd5jut8kvcm8u:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv13781-dvckr0uqfwrsvmc6-zklf1olhlhzzfppp:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12133-dp55dttaolpbd6n8-rlhoezgituqkyrov:0 as an user of vg_kvm/lvpool.
Adding vg_kvm/vsv12042-dnncyzlyhfxyaxkt-metx0ei0zlz3d2sn:0 as an user of vg_kvm/lvpool.
metadata/pvmetadataignore not found in config: defaulting to 0
metadata/pvmetadatasize not found in config: defaulting to 255
metadata/pvmetadatacopies not found in config: defaulting to 1
report/output_format not found in config: defaulting to basic
log/report_command_log not found in config: defaulting to 0
Locking /run/lock/lvm/P_orphans WB
/dev/sda4: size is 3296745472 sectors
/dev/sda4: using cached size 3296745472 sectors
/dev/sda: size is 3746562048 sectors
/dev/sda1: size is 1024000 sectors
/dev/sda1: using cached size 1024000 sectors
/dev/sda2: size is 134217728 sectors
/dev/sda2: using cached size 134217728 sectors
/dev/sda3: size is 314572800 sectors
/dev/sda3: using cached size 314572800 sectors
/dev/sda4: using cached size 3296745472 sectors
/dev/sda4: using cached size 3296745472 sectors
Locking #orphans_lvm1 already done
Reading VG #orphans_lvm1
Locking #orphans_pool already done
Reading VG #orphans_pool
Locking #orphans_lvm2 already done
Reading VG #orphans_lvm2
Processing device /dev/sda1.
Processing device /dev/sda2.
Processing device /dev/sda3.
Processing device /dev/sda4.
/dev/sda4: lvm2 label detected at sector 1
/dev/sda4: Checksum error at offset 808960
Couldn't read volume group metadata from /dev/sda4.
Metadata location on /dev/sda4 at 808960 has invalid summary for VG.
Failed to read metadata summary from /dev/sda4
Failed to scan VG from /dev/sda4
Unlocking /run/lock/lvm/P_orphans
[root@mia3 ~]#
注意错误：
Couldn't find device with uuid HNB35U-ilI4-WWAK-1Q4D-Netj-t68p-Po4vCT.
PV (/dev/sda4) 具有相同的 UUID：
[root@mia3 ~]# blkid
/dev/sda1: LABEL="boot" UUID="087755bd-9434-4597-953b-c056fd9cb285" TYPE="xfs"
/dev/sda2: LABEL="swap" UUID="c7fd2030-0441-4a4e-8462-0aeffc272bfa" TYPE="swap"
/dev/sda3: LABEL="root" UUID="3ee19cf6-87b5-40b5-a7dd-13d507efa734" TYPE="xfs"
/dev/sda4: UUID="HNB35U-ilI4-WWAK-1Q4D-Netj-t68p-Po4vCT" TYPE="LVM2_member"
[root@mia3 ~]#
下面是/etc/lvm/backup/vg_kvm的一小部分内容：
vg_kvm {
id = "i3usZz-vdt5-9yaU-Kbcl-XDWJ-OFr1-UhZRBa"
seqno = 1349
format = "lvm2" # informational
status = ["RESIZEABLE", "READ", "WRITE"]
flags = []
extent_size = 8192 # 4 Megabytes
max_lv = 0
max_pv = 0
metadata_copies = 0
physical_volumes {
pv0 {
id = "HNB35U-ilI4-WWAK-1Q4D-Netj-t68p-Po4vCT"
device = "/dev/sda4" # Hint only
status = ["ALLOCATABLE"]
flags = []
dev_size = 3296745472 # 1.53517 Terabytes
pe_start = 2048
pe_count = 402434 # 1.53516 Terabytes
}
}
logical_volumes {
lvpool {
id = "DHqs7X-95DA-ADNm-WTd9-cXDf-HR5a-MoHLRx"
status = ["READ", "WRITE", "VISIBLE"]
flags = []
creation_time = 1575901618 # 2019-12-09 16:26:58 +0200
creation_host = "mia3"
segment_count = 1
segment1 {
start_extent = 0
extent_count = 401081 # 1.53 Terabytes
type = "thin-pool"
metadata = "lvpool_tmeta"
pool = "lvpool_tdata"
transaction_id = 667
chunk_size = 2048 # 1024 Kilobytes
discards = "passdown"
zero_new_blocks = 1
}
}
vsv11999-dm9oryxunpw8po9p-1xwrkrotul6i5k3g {
id = "vBco77-gPno-S0cu-QZdx-9Nnk-twXR-cBBAzW"
status = ["READ", "WRITE", "VISIBLE"]
flags = []
creation_time = 1575902920 # 2019-12-09 16:48:40 +0200
creation_host = "mia3"
segment_count = 1
segment1 {
start_extent = 0
extent_count = 6400 # 25 Gigabytes
type = "thin"
thin_pool = "lvpool"
transaction_id = 0
device_id = 1
}
}
vsv12001-dmzdbquhkhrydlnf-kqjcbeyvz1c5xwun {
id = "xqDzS2-iHXO-2zEi-LRHO-0FDR-hvcM-oRdFeD"
status = ["READ", "WRITE", "VISIBLE"]
flags = []
creation_time = 1575904408 # 2019-12-09 17:13:28 +0200
creation_host = "mia3"
segment_count = 1
segment1 {
start_extent = 0
extent_count = 3840 # 15 Gigabytes
type = "thin"
thin_pool = "lvpool"
transaction_id = 1
device_id = 2
}
}
vs
Red Hat 7 和 8 在尝试使用时似乎有类似的问题vgcfgrestore：pvcreate 命令失败，并出现“元数据位置具有无效的 VG 摘要”错误。CentOS 与 Red Hat 共享一个基础，所以......
一个答案是“我们在上游和 RHEL8 中有一个针对这个问题的解决方案，不幸的是，现阶段考虑向后移植到 RHEL7 的侵入性太大。” 另一个遇到该错误的人表示，他们通过启动 Red Hat 6 修复了该问题，然后就vgcfgrestore开始工作了。
也许您可以从 USB 记忆棒启动新的 sysrescue CD 并执行此操作？
正如我在评论中所说，要么使用 备份整个卷dd，或者至少执行类似的操作dd if=/dev/sda4 of=/somewere/backup-first100MB.img bs=1M count=100，以便获得标题信息。
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