{"id":109462,"date":"2026-09-24T08:08:47","date_gmt":"2026-09-24T00:08:47","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/109462.html"},"modified":"2026-09-24T08:08:47","modified_gmt":"2026-09-24T00:08:47","slug":"lvm%e9%80%bb%e8%be%91%e5%8d%b7%e7%ae%a1%e7%90%86%e5%ae%9e%e6%88%98%ef%bc%9apv%e3%80%81vg%e3%80%81lv%e5%88%9b%e5%bb%ba%e3%80%81%e6%89%a9%e5%ae%b9%e4%b8%8e%e5%bf%ab%e7%85%a7","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/109462.html","title":{"rendered":"LVM\u903b\u8f91\u5377\u7ba1\u7406\u5b9e\u6218\uff1aPV\u3001VG\u3001LV\u521b\u5efa\u3001\u6269\u5bb9\u4e0e\u5feb\u7167"},"content":{"rendered":"

\u4f20\u7edf\u5206\u533a\u4e00\u65e6\u5212\u597d，\u60f3\u6269\u5c31\u5f97\u5907\u4efd\u3001\u5220\u5206\u533a\u3001\u91cd\u5212\u3001\u518d\u6062\u590d，\u5168\u7a0b\u8981\u505c\u673a\u3002LVM（Logical Volume Manager）\u5728\u7269\u7406\u786c\u76d8\u548c\u6587\u4ef6\u7cfb\u7edf\u4e4b\u95f4\u52a0\u4e86\u4e00\u5c42\u62bd\u8c61：\u628a\u591a\u5757\u76d8\u62fc\u6210\u4e00\u4e2a\u5927\u6c60，\u518d\u4ece\u6c60\u91cc\u6309\u9700\u5207\u903b\u8f91\u5377\u3002\u6269\u5bb9\u7f29\u5bb9\u4e0d\u7528\u52a8\u7269\u7406\u76d8，\u5feb\u7167\u505a\u5907\u4efd\u4e5f\u65b9\u4fbf\u3002\u8fd9\u4e00\u7bc7\u4ece\u521b\u5efa\u3001\u5728\u7ebf\u6269\u5bb9\u3001\u7f29\u5bb9\u5230\u5feb\u7167\u5b8c\u6574\u8d70\u4e00\u904d，\u987a\u5e26\u628a\u6700\u5bb9\u6613\u641e\u53cd\u7684\u7f29\u5bb9\u987a\u5e8f\u8bb2\u6e05\u695a\u3002<\/p>\n

\u4e00\u3001\u5148\u7406\u6e05\u4e09\u5c42\u7ed3\u6784<\/h3>\n\n\u6982\u5ff5\u5168\u79f0\u662f\u4ec0\u4e48<\/tr>\n\n\n\n\n\n\n
PV<\/td>\nPhysical Volume \u7269\u7406\u5377<\/td>\n\u4e00\u5757\u76d8\u6216\u4e00\u4e2a\u5206\u533a，pvcreate \u4e4b\u540e\u7684\u72b6\u6001<\/td>\n<\/tr>\n
VG<\/td>\nVolume Group \u5377\u7ec4<\/td>\n\u628a\u591a\u4e2a PV \u6346\u5728\u4e00\u8d77\u7684\u5b58\u50a8\u6c60<\/td>\n<\/tr>\n
LV<\/td>\nLogical Volume \u903b\u8f91\u5377<\/td>\n\u4ece VG \u91cc\u5207\u51fa\u6765\u3001\u7ed9\u6587\u4ef6\u7cfb\u7edf\u7528\u7684"\u865a\u62df\u5206\u533a"<\/td>\n<\/tr>\n
PE<\/td>\nPhysical Extent<\/td>\nVG \u7684\u6700\u5c0f\u5206\u914d\u5355\u5143，\u9ed8\u8ba4 4MB<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u7406\u89e3\u65b9\u5f0f\u5f88\u7b80\u5355：VG \u662f\u4e00\u5757\u5927\u753b\u5e03，LV \u662f\u4ece\u753b\u5e03\u4e0a\u526a\u4e0b\u6765\u7684\u753b\u7eb8，\u6587\u4ef6\u7cfb\u7edf\u5c31\u753b\u5728\u753b\u7eb8\u4e0a\u3002\u65b0\u76d8\u52a0\u8fdb\u6765\u5c31\u662f\u5f80\u753b\u5e03\u4e0a\u6dfb\u6599，\u6269 LV \u5c31\u662f\u628a\u753b\u7eb8\u62c9\u5927\u2014\u2014\u53ea\u8981\u753b\u5e03\u4e0a\u8fd8\u6709\u7a7a\u4f59，\u6587\u4ef6\u7cfb\u7edf\u8ddf\u7740\u957f\u5c31\u884c\u3002<\/p>\n

\u4e8c\u3001\u5b89\u88c5\u4e0e\u51c6\u5907<\/h3>\n

Ubuntu\/Debian \u4e0a\u5148\u88c5：<\/p>\n

sudo<\/span> apt<\/span> install<\/span> lvm2<\/p>\n

CentOS\/Rocky \u6700\u5c0f\u5316\u5b89\u88c5\u901a\u5e38\u81ea\u5e26，\u7f3a\u4e86\u5c31 sudo dnf install lvm2\u3002<\/p>\n

\u5047\u8bbe\u65b0\u63d2\u4e86\u4e24\u5757\u7a7a\u76d8 \/dev\/sdb\u3001\/dev\/sdc，\u5148 lsblk \u786e\u8ba4\u6ca1\u6302\u7740\u6570\u636e，\u518d\u5efa PV：<\/p>\n

sudo<\/span> pvcreate \/dev\/sdb \/dev\/sdc<\/p>\n

\u9884\u671f\u8f93\u51fa：<\/p>\n

Physical volume "\/dev\/sdb" successfully created.
\n Physical volume "\/dev\/sdc" successfully created.<\/p>\n

pvcreate \u4f1a\u62b9\u6389\u76d8\u4e0a\u539f\u6709\u5206\u533a\u8868\u548c\u6570\u636e，\u53ea\u5bf9\u786e\u8ba4\u4e0d\u8981\u4e86\u7684\u76d8\u6267\u884c\u3002\u67e5\u770b PV：<\/p>\n

sudo<\/span> pvs<\/p>\n

\u9884\u671f\u8f93\u51fa：<\/p>\n

PV VG Fmt Attr PSize PFree
\n \/dev\/sdb lvm2 — 200.00g 200.00g
\n \/dev\/sdc lvm2 — 200.00g 200.00g<\/p>\n

\u4e09\u3001\u521b\u5efa VG \u548c LV<\/h3>\n

\u5efa\u5377\u7ec4<\/h4>\n

sudo<\/span> vgcreate vg_data \/dev\/sdb \/dev\/sdc<\/p>\n

\u9884\u671f\u8f93\u51fa：<\/p>\n

Volume group "vg_data" successfully created<\/p>\n

vg_data \u662f\u81ea\u5df1\u8d77\u7684\u540d\u5b57\u3002\u4e24\u5757\u76d8\u73b0\u5728\u5408\u6210\u4e00\u4e2a 400G \u7684\u6c60\u5b50：<\/p>\n

sudo<\/span> vgs<\/p>\n

\u9884\u671f\u8f93\u51fa：<\/p>\n

VG #PV #LV #SN Attr VSize VFree
\n vg_data 2 0 0 wz–n- 400.99g 400.99g<\/p>\n

VFree \u5c31\u662f\u6c60\u5b50\u91cc\u8fd8\u5269\u591a\u5c11\u6ca1\u7528\u3002<\/p>\n

\u5efa\u903b\u8f91\u5377\u5e76\u683c\u5f0f\u5316<\/h4>\n

\u5207\u4e00\u4e2a 100G \u7684 LV：<\/p>\n

sudo<\/span> lvcreate -n<\/span> lv_data -L<\/span> 100G vg_data<\/p>\n

\u9884\u671f\u8f93\u51fa：<\/p>\n

Logical volume "lv_data" created.<\/p>\n

\u4e5f\u53ef\u4ee5\u7528\u5360\u6bd4\u65b9\u5f0f，\u628a\u6574\u4e2a\u6c60\u5b50\u4e00\u6b21\u5207\u5b8c：<\/p>\n

sudo<\/span> lvcreate -n<\/span> lv_all -l<\/span> 100<\/span>%FREE vg_data<\/p>\n

-L \u6309\u5927\u5c0f\u7ed9（10G），-l \u6309 PE \u6570\u91cf\u6216\u767e\u5206\u6bd4\u7ed9（100%FREE），\u522b\u641e\u6df7\u3002<\/p>\n

\u683c\u5f0f\u5316\u5e76\u6302\u8f7d：<\/p>\n

sudo<\/span> mkfs.ext4 \/dev\/vg_data\/lv_data
\nsudo<\/span> mkdir<\/span> -p<\/span> \/data
\nsudo<\/span> mount<\/span> \/dev\/vg_data\/lv_data \/data<\/p>\n

LV \u7684\u8bbe\u5907\u8282\u70b9\u6709\u4e24\u4e2a\u7b49\u4ef7\u8def\u5f84：\/dev\/vg_data\/lv_data \u548c \/dev\/mapper\/vg_data-lv_data，fstab \u91cc\u5199\u54ea\u4e2a\u90fd\u884c，\u63a8\u8350\u524d\u8005，\u53ef\u8bfb\u6027\u597d\u3002<\/p>\n

\u56db\u3001\u5728\u7ebf\u6269\u5bb9：\u6700\u5e38\u7528\u7684\u64cd\u4f5c<\/h3>\n

\u4e1a\u52a1\u6da8\u4e86，\/data \u4e0d\u591f\u7528\u4e86\u3002\u6d41\u7a0b\u662f：\u5148\u52a0\u76d8\u8fdb VG，\u518d\u6269 LV，\u6700\u540e\u6269\u6587\u4ef6\u7cfb\u7edf\u3002<\/p>\n

\u7b2c\u4e00\u6b65：\u65b0\u76d8\u52a0\u5165 VG<\/h4>\n

\u5047\u8bbe\u53c8\u63d2\u4e86\u4e00\u5757 \/dev\/sdd：<\/p>\n

sudo<\/span> pvcreate \/dev\/sdd
\nsudo<\/span> vgextend vg_data \/dev\/sdd<\/p>\n

vgs \u91cc VFree \u4f1a\u591a\u51fa\u8fd9 200G\u3002<\/p>\n

\u7b2c\u4e8c\u6b65：\u6269 LV \u548c\u6587\u4ef6\u7cfb\u7edf<\/h4>\n

ext4 \u53ef\u4ee5\u5728\u7ebf\u6269（\u6302\u8f7d\u72b6\u6001\u4e0b\u76f4\u63a5\u957f），\u4e00\u6761\u547d\u4ee4\u8fde LV \u5e26\u6587\u4ef6\u7cfb\u7edf\u4e00\u8d77\u6269：<\/p>\n

sudo<\/span> lvextend -L<\/span> +50G -r<\/span> \/dev\/vg_data\/lv_data<\/p>\n

\u9884\u671f\u8f93\u51fa（\u8282\u9009）：<\/p>\n

Size of logical volume vg_data\/lv_data changed from 100.00 GiB to 150.00 GiB.
\n Logical volume vg_data\/lv_data successfully resized.
\nresize2fs 1.46.5 (30-Dec-2021)
\nFilesystem at \/dev\/mapper\/vg_data-lv_data is mounted on \/data; on-line resizing required
\n…<\/p>\n

-r \u662f\u5173\u952e：\u5b83\u8ba9 lvextend \u81ea\u52a8\u8c03\u7528 resize2fs（ext4）\u6216 xfs_growfs（XFS），\u4e0d\u7528\u81ea\u5df1\u518d\u8dd1\u4e00\u904d\u3002<\/p>\n

\u5982\u679c\u4e0d\u52a0 -r，\u5f97\u624b\u52a8\u5206\u4e24\u6b65：<\/p>\n

sudo<\/span> lvextend -L<\/span> +50G \/dev\/vg_data\/lv_data
\nsudo<\/span> resize2fs \/dev\/vg_data\/lv_data # ext4<\/span><\/p>\n

XFS \u6ce8\u610f：XFS \u53ea\u80fd\u6269\u4e0d\u80fd\u7f29，\u800c\u4e14 xfs_growfs \u540e\u9762\u8ddf\u7684\u662f\u6302\u8f7d\u70b9，\u4e0d\u662f\u8bbe\u5907：<\/p>\n

sudo<\/span> lvextend -L<\/span> +50G -r<\/span> \/dev\/vg_data\/lv_data # -r \u4f1a\u81ea\u52a8\u8c03 xfs_growfs<\/span>
\n# \u624b\u52a8\u5199\u6cd5：<\/span>
\nsudo<\/span> xfs_growfs \/data<\/p>\n

\u4e94\u3001\u7f29\u5bb9：\u987a\u5e8f\u9519\u4e86\u4f1a\u4e22\u6570\u636e<\/h3>\n

\u7f29\u5bb9\u6bd4\u6269\u5bb9\u5371\u9669\u5f97\u591a，\u800c\u4e14 XFS \u6839\u672c\u4e0d\u652f\u6301\u7f29，\u4e0b\u9762\u53ea\u8bb2 ext4\u3002\u987a\u5e8f\u5fc5\u987b\u662f：\u5148\u7f29\u6587\u4ef6\u7cfb\u7edf，\u518d\u7f29 LV\u3002\u53cd\u8fc7\u6765\u2014\u2014\u5148\u628a LV \u5207\u5c0f，\u6587\u4ef6\u7cfb\u7edf\u8fd8\u4ee5\u4e3a\u81ea\u5df1\u5360\u7740\u66f4\u5927\u7684\u5730\u76d8，\u76f4\u63a5\u635f\u574f\u3002<\/p>\n

\u5b8c\u6574\u6b65\u9aa4：<\/p>\n

sudo<\/span> umount<\/span> \/data
\nsudo<\/span> e2fsck -f<\/span> \/dev\/vg_data\/lv_data # \u5fc5\u987b\u5148\u68c0\u67e5<\/span>
\nsudo<\/span> resize2fs \/dev\/vg_data\/lv_data 80G # \u6587\u4ef6\u7cfb\u7edf\u7f29\u5230 80G<\/span>
\nsudo<\/span> lvreduce -L<\/span> 80G \/dev\/vg_data\/lv_data # LV \u518d\u7f29\u5230 80G<\/span>
\nsudo<\/span> mount<\/span> \/data<\/p>\n

\u9884\u671f\u8f93\u51fa（resize2fs，\u8282\u9009）：<\/p>\n

Resizing the filesystem on \/dev\/mapper\/vg_data-lv_data to 20971520 (4k) blocks.
\nThe filesystem on \/dev\/mapper\/vg_data-lv_data is now 20971520 (4k) blocks long.<\/p>\n

\u51e0\u4e2a\u786c\u89c4\u77e9：<\/p>\n

    \n
  • \u5fc5\u987b\u5148 umount，\u6302\u8f7d\u72b6\u6001\u4e0b\u7f29 ext4 \u4f1a\u51fa\u95ee\u9898\u3002<\/li>\n
  • \u5fc5\u987b\u5148 e2fsck -f，\u6587\u4ef6\u7cfb\u7edf\u4e0d\u5e72\u51c0\u65f6 resize2fs \u62d2\u7edd\u5e72\u6d3b\u3002<\/li>\n
  • \u65b0\u5927\u5c0f\u8981\u7ed9\u6587\u4ef6\u7cfb\u7edf\u7559\u4f59\u91cf：resize2fs \u5199 80G，lvreduce \u4e5f\u5199 80G，\u522b\u8ba9 LV \u6bd4\u6587\u4ef6\u7cfb\u7edf\u8fd8\u5c0f\u3002<\/li>\n
  • \u7f29\u5bb9\u524d\u628a \/data \u91cc\u7684\u91cd\u8981\u6570\u636e\u5907\u4efd\u4e00\u4efd\u3002\u8fd9\u662f\u5c11\u6570"\u64cd\u4f5c\u524d\u5fc5\u987b\u5907\u4efd"\u7684\u573a\u666f\u3002<\/li>\n<\/ul>\n

    \u516d\u3001\u5feb\u7167：\u7ed9 LV \u62cd\u4e2a\u7167<\/h3>\n

    LVM \u5feb\u7167\u5728\u67d0\u4e00\u77ac\u95f4\u51bb\u7ed3 LV \u7684\u89c6\u56fe，\u9002\u5408\u5907\u4efd\u524d\u5148\u6253\u4e2a\u5feb\u7167，\u5728\u5feb\u7167\u4e0a\u8dd1\u5907\u4efd，\u4e0d\u5f71\u54cd\u4e1a\u52a1\u76d8\u3002<\/p>\n

    sudo<\/span> lvcreate -s<\/span> -n<\/span> lv_data_snap -L<\/span> 2G \/dev\/vg_data\/lv_data<\/p>\n

    \u9884\u671f\u8f93\u51fa：<\/p>\n

    Logical volume "lv_data_snap" created.<\/p>\n

    \u9884\u671f\u8f93\u51fa\u91cc -L 2G \u662f\u5feb\u7167\u672c\u8eab\u7684\u5bb9\u91cf，\u5b58"\u539f LV \u5728\u5feb\u7167\u671f\u95f4\u88ab\u6539\u52a8\u7684\u6570\u636e\u5757"\u3002\u539f\u76d8\u5199\u5f97\u8d8a\u591a，\u5feb\u7167\u5360\u7528\u8d8a\u5927，\u6491\u6ee1\u4e86\u5feb\u7167\u5c31\u4f5c\u5e9f\u3002\u6570\u636e\u5e93\u7c7b\u573a\u666f\u5feb\u7167\u5927\u5c0f\u6309\u9884\u671f\u53d8\u66f4\u91cf\u4f30\u3002<\/p>\n

    \u5feb\u7167\u6302\u4e0a\u6765\u770b\u770b：<\/p>\n

    sudo<\/span> mkdir<\/span> -p<\/span> \/mnt\/snap
    \nsudo<\/span> mount<\/span> -o<\/span> ro \/dev\/vg_data\/lv_data_snap \/mnt\/snap
    \nls<\/span> \/mnt\/snap<\/p>\n

    \u5907\u4efd\u5b8c，\u5220\u6389\u5feb\u7167：<\/p>\n

    sudo<\/span> umount<\/span> \/mnt\/snap
    \nsudo<\/span> lvremove \/dev\/vg_data\/lv_data_snap<\/p>\n

    \u4e03\u3001\u26a0\ufe0f \u5e38\u89c1\u9519\u8bef<\/h3>\n
  • \u7f29\u5bb9\u987a\u5e8f\u641e\u53cd：\u5148 lvreduce \u518d resize2fs，\u6587\u4ef6\u7cfb\u7edf\u76f4\u63a5\u635f\u574f\u3002\u7262\u8bb0"\u6587\u4ef6\u7cfb\u7edf\u5148\u884c"\u3002<\/li>\n
  • XFS \u4e0a\u8dd1 resize2fs：XFS \u4e0d\u8ba4，\u62a5 Bad magic number\u3002XFS \u7528 xfs_growfs，\u800c\u4e14\u4e0d\u80fd\u7f29\u3002<\/li>\n
  • \u5fd8\u4e86 -r \u4ee5\u4e3a\u6269\u5b8c\u4e86：LV \u5927\u4e86，\u6587\u4ef6\u7cfb\u7edf\u6ca1\u957f，df -h \u4e00\u770b\u7a7a\u95f4\u6ca1\u53d8\u3002\u8981\u4e48\u52a0 -r，\u8981\u4e48\u624b\u52a8\u8865\u4e00\u53e5 resize2fs \/ xfs_growfs\u3002<\/li>\n
  • \u5feb\u7167\u957f\u671f\u4e0d\u5220：\u5feb\u7167\u5360\u7684\u662f VG \u7684\u7a7a\u95f4，\u5fd8\u4e86\u5220\u4f1a\u628a\u6c60\u5403\u6ee1\u3002<\/li>\n
  • pvcreate \u7528\u5728\u6709\u6570\u636e\u7684\u76d8：\u5206\u533a\u8868\u76f4\u63a5\u88ab\u62b9\u3002\u6267\u884c\u524d lsblk\u3001blkid \u518d\u786e\u8ba4\u4e00\u904d\u3002<\/li>\n

    \u516b\u3001\u77e5\u8bc6\u6269\u5c55：PE \u5927\u5c0f\u9009\u9519\u7684\u4ee3\u4ef7<\/h3>\n

    \u5efa VG \u65f6\u53ef\u4ee5\u7528 -s \u6307\u5b9a PE（\u7269\u7406\u5757）\u5927\u5c0f，\u9ed8\u8ba4 4MB：<\/p>\n

    sudo<\/span> vgcreate -s<\/span> 16M vg_data \/dev\/sdb \/dev\/sdc<\/p>\n

    PE \u662f VG \u5206\u914d\u7684\u6700\u5c0f\u9897\u7c92\u3002\u4e00\u4e2a VG \u6700\u591a\u652f\u6301 65534 \u4e2a PE，\u6240\u4ee5 PE \u5927\u5c0f\u76f4\u63a5\u51b3\u5b9a VG \u603b\u5bb9\u91cf\u4e0a\u9650：4MB \u00d7 65534 \u2248 256GB，16MB \u2248 1TB，\u5bf9\u73b0\u4ee3\u52a8\u4e0d\u52a8\u51e0\u5341 T \u7684\u5b58\u50a8\u6c60\u5c31\u4e0d\u591f\u770b\u4e86\u3002\u5927\u5bb9\u91cf\u6c60\u5b50\u4e00\u822c\u5efa VG \u65f6\u5c31\u628a PE \u8bbe\u6210 32MB \u6216 64MB\u3002<\/p>\n

    \u5efa VG \u65f6\u6ca1\u6307\u5b9a，\u4e4b\u540e\u60f3\u6539 PE \u5927\u5c0f\u53ea\u80fd\u91cd\u5efa VG，\u6240\u4ee5\u89c4\u5212\u9636\u6bb5\u5c31\u7b97\u597d\u3002\u8fd9\u4e5f\u662f\u4e3a\u4ec0\u4e48 LVM \u9002\u5408"\u957f\u671f\u89c4\u5212"\u7684\u5b58\u50a8\u6c60，\u800c\u4e0d\u662f\u4e34\u65f6\u73a9\u73a9\u3002<\/p>\n

    \u53e6\u4e00\u4e2a\u7701\u4e8b\u547d\u4ee4：vgs\u3001pvs\u3001lvs \u662f\u7b80\u8868，\u5199\u811a\u672c\u7528；vgdisplay\u3001pvdisplay\u3001lvdisplay \u662f\u8be6\u60c5，\u6392\u969c\u65f6\u770b\u5b8c\u6574\u4fe1\u606f\u7528\u3002\u65e5\u5e38\u8bb0 pvs \/ vgs \/ lvs \u4e09\u6761\u5c31\u591f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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