Hard-Drive
Centos 伺服器沒有磁碟空間但 df 說有很多
我的 Centos 告訴我沒有剩餘磁碟空間：
[root@zff isos]# touch test touch: cannot touch ‘test’: No space left on device但是df告訴我我還有很多空間：
[root@zff isos]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 3.6T 1.4T 2.2T 39% / devtmpfs 32G 0 32G 0% /dev tmpfs 32G 0 32G 0% /dev/shm tmpfs 32G 67M 32G 1% /run tmpfs 32G 0 32G 0% /sys/fs/cgroup /dev/sda4 497M 165M 333M 34% /boot /dev/sda1 496M 9.8M 487M 2% /boot/efi /dev/mapper/centos-home 75G 33M 75G 1% /home tmpfs 6.3G 4.0K 6.3G 1% /run/user/0我也沒有用完 inode：
[root@zff isos]# df -i Filesystem Inodes IUsed IFree IUse% Mounted on /dev/mapper/centos-root 3791101952 82816 3791019136 1% / devtmpfs 8209805 563 8209242 1% /dev tmpfs 8211404 1 8211403 1% /dev/shm tmpfs 8211404 1246 8210158 1% /run tmpfs 8211404 13 8211391 1% /sys/fs/cgroup /dev/sda4 512000 30 511970 1% /boot /dev/sda1 0 0 0 - /boot/efi /dev/mapper/centos-home 39321600 11 39321589 1% /home tmpfs 8211404 3 8211401 1% /run/user/0我不知道問題是什麼。任何幫助表示讚賞！
以下是一些附加資訊：
[root@zff isos]# pvs PV VG Fmt Attr PSize PFree /dev/sda5 centos lvm2 a-- 3.63t 0 [root@zff isos]# vgs VG #PV #LV #SN Attr VSize VFree centos 1 3 0 wz--n- 3.63t 0 [root@zff isos]# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert home centos -wi-ao---- 75.00g root centos -wi-ao---- 3.53t swap centos -wi-ao---- <31.45g [root@zff isos]# sudo find /proc/*/fd -ls 2>/dev/null | grep '(deleted)' 121429799 0 lrwx------ 1 root root 64 Nov 7 15:34 /proc/8762/fd/7 -> /tmp/ffi2lKXH0\ (deleted) 121429814 0 lrwx------ 1 root root 64 Nov 7 15:34 /proc/8939/fd/8 -> /tmp/ffimBw8GN\ (deleted) [root@zff isos]# fdisk -l WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion. Disk /dev/sda: 3999.7 GB, 3999688294400 bytes, 7811891200 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: gpt # Start End Size Type Name 1 2048 1026047 500M EFI System EFI System Partition 2 1026048 1230847 100M unknown Basic data partition 3 1230848 5425151 2G Microsoft basic Basic data partition 4 5425152 6449151 500M Microsoft basic 5 6449152 7811889151 3.6T Linux LVM Disk /dev/mapper/centos-swap: 33.8 GB, 33764147200 bytes, 65945600 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 /dev/mapper/centos-root: 3882.1 GB, 3882088398848 bytes, 7582203904 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 /dev/mapper/centos-home: 80.5 GB, 80530636800 bytes, 157286400 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes [root@zff /]# du -sh du: cannot access ‘./proc/45722/task/45722/fd/4’: No such file or directory du: cannot access ‘./proc/45722/task/45722/fdinfo/4’: No such file or directory du: cannot access ‘./proc/45722/fd/4’: No such file or directory du: cannot access ‘./proc/45722/fdinfo/4’: No such file or directory 1.4T .編輯
[root@zff /]# df -T Filesystem Type 1K-blocks Used Available Use% Mounted on /dev/mapper/centos-root xfs 3791076352 1440862400 2350213952 39% / devtmpfs devtmpfs 32839220 0 32839220 0% /dev tmpfs tmpfs 32845616 0 32845616 0% /dev/shm tmpfs tmpfs 32845616 68484 32777132 1% /run tmpfs tmpfs 32845616 0 32845616 0% /sys/fs/cgroup /dev/sda4 xfs 508588 168456 340132 34% /boot /dev/sda1 vfat 507904 9980 497924 2% /boot/efi /dev/mapper/centos-home xfs 78604800 33000 78571800 1% /home tmpfs tmpfs 6569124 4 6569120 1% /run/user/0編輯 2
[root@zff /]# xfs_ncheck /dev/mapper/centos-root ERROR: The filesystem has valuable metadata changes in a log which needs to be replayed. Mount the filesystem to replay the log, and unmount it before re-running xfs_ncheck. If you are unable to mount the filesystem, then use the xfs_repair -L option to destroy the log and attempt a repair. Note that destroying the log may cause corruption -- please attempt a mount of the filesystem before doing this. must run blockget -n first
重新啟動伺服器（
init 6）解決了我的問題。謝謝您的幫助。
df只知道核心中已送出的文件系統更改。例如，如果您刪除了大量正在使用的數據，df則在保持打開這些文件的程序停止並釋放資源之前，不會反映這一點。這不是導致這種情況的唯一條件，但它很常見。
df重啟後通常會反映現實，但這是一個“大錘”解決方案。您可以通過搜尋由程序打開但也被刪除的文件來查看問題所在。lsof以下形式對此有好處：lsof -nP +L1您可能還必須考慮相反的情況，因為您可能分配了
df尚未提取的數據。這種情況的解決方案很大程度上取決於您使用的文件系統和核心。如果您讓我知道您正在執行什麼，那將為我在這部分答案上提供一些指導。