我有一台带有 2 个磁盘和 2 个 VG 的虚拟机，其中一个磁盘是 PV（无分区）。操作系统是 CentOS 7。现在磁盘不可用。PVS 显示：
# pvs
WARNING: Device for PV L9Anor-qlzF-mTT7-Rxx0-Ovig-hMQI-OkupZL not found or rejected by a filter.
WARNING: Device for PV L9Anor-qlzF-mTT7-Rxx0-Ovig-hMQI-OkupZL not found or rejected by a filter.
WARNING: Device for PV L9Anor-qlzF-mTT7-Rxx0-Ovig-hMQI-OkupZL not found or rejected by a filter.
Couldn't find device with uuid L9Anor-qlzF-mTT7-Rxx0-Ovig-hMQI-OkupZL.
PV VG Fmt Attr PSize PFree
...
[unknown] vgbackup lvm2 a-m <800,00g <30,00g
--- Volume group ---
VG Name vgbackup
System ID
Format lvm2
Metadata Areas 0
Metadata Sequence No 5
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 0
Max PV 0
Cur PV 1
Act PV 0
VG Size <800,00 GiB
PE Size 4,00 MiB
Total PE 204799
Alloc PE / Size 197120 / 770,00 GiB
Free PE / Size 7679 / <30,00 GiB
VG UUID d2QWd0-eg28-RpRY-RX0h-JV7A-dpJH-jRF71x
VG 仅包含此磁盘，此 vg 中没有其他 pv。尝试删除 pv：
vgremove --force vgbackup
WARNING: Device for PV L9Anor-qlzF-mTT7-Rxx0-Ovig-hMQI-OkupZL not found or rejected by a filter.
Couldn't find device with uuid L9Anor-qlzF-mTT7-Rxx0-Ovig-hMQI-OkupZL.
Aborting vg_write: No metadata areas to write to!
尝试添加循环设备来写入元数据：
# losetup -l
NAME SIZELIMIT OFFSET AUTOCLEAR RO BACK-FILE
/dev/loop0 0 0 0 0 /tmp/tmp.raw
# vgextend vgbackup /dev/loop0
WARNING: Device for PV L9Anor-qlzF-mTT7-Rxx0-Ovig-hMQI-OkupZL not found or rejected by a filter.
WARNING: Device for PV L9Anor-qlzF-mTT7-Rxx0-Ovig-hMQI-OkupZL not found or rejected by a filter.
Couldn't find device with uuid L9Anor-qlzF-mTT7-Rxx0-Ovig-hMQI-OkupZL.
WARNING: Device for PV L9Anor-qlzF-mTT7-Rxx0-Ovig-hMQI-OkupZL not found or rejected by a filter.
Segmentation fault
/dev/loop0 PV 已创建但未附加到 vgbackup：
# pvs
WARNING: Device for PV L9Anor-qlzF-mTT7-Rxx0-Ovig-hMQI-OkupZL not found or rejected by a filter.
WARNING: Device for PV L9Anor-qlzF-mTT7-Rxx0-Ovig-hMQI-OkupZL not found or rejected by a filter.
WARNING: Device for PV L9Anor-qlzF-mTT7-Rxx0-Ovig-hMQI-OkupZL not found or rejected by a filter.
Couldn't find device with uuid L9Anor-qlzF-mTT7-Rxx0-Ovig-hMQI-OkupZL.
PV VG Fmt Attr PSize PFree
/dev/loop0 lvm2 --- 100,00m 100,00m
/dev/sda2 rootvg lvm2 a-- 58,80g 4,00m
[unknown] vgbackup lvm2 a-m <800,00g <30,00g
现在该怎么办？如何从 lvm 配置中删除 vgbackup？现在无法重新启动。
感谢您的帮助！