/ sbin / dump：“打开文件系统时超级块中的幻数不好”

我正在尝试备份我们的一台服务器：

[root@butler /]# /sbin/dump -0uan -f - / | gzip -2 | ssh -c blowfish [email protected] dd of=/RAIDPOOL01/sysbackup/full-backup-`date '+%d-%B-%Y'`.dump.gz 

这给了我一个奇怪的错误：

 DUMP: No group entry for operator. DUMP: Date of this level 0 dump: Mon Feb 15 10:34:30 2016 DUMP: Dumping /dev/mapper/centos_butler-root (/) to standard output /dev/mapper/centos_butler-root: Bad magic number in super-block while opening filesystem DUMP: The ENTIRE dump is aborted. 

这是什么，以及如何解决这个问题，以创build一个备份？

mount输出：

• 检查备份转储是否有效
• 如何在每个进程的核心转储在Linux？
• 将所有数据库转储到文件
• 从SSH转储一个表
• 当/etc/kdump.conf丢失时kdump没有安装？

 proc on /proc type proc (rw,nosuid,nodev,noexec,relatime) sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime) devtmpfs on /dev type devtmpfs (rw,nosuid,size=3894872k,nr_inodes=973718,mode=755) securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime) tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev) devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000) tmpfs on /run type tmpfs (rw,nosuid,nodev,mode=755) tmpfs on /sys/fs/cgroup type tmpfs (rw,nosuid,nodev,noexec,mode=755) cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd) pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime) cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset) cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpuacct,cpu) cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory) cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices) cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer) cgroup on /sys/fs/cgroup/net_cls type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls) cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio) cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event) cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb) configfs on /sys/kernel/config type configfs (rw,relatime) /dev/mapper/centos_butler-root on / type xfs (rw,relatime,attr2,inode64,noquota) systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=34,pgrp=1,timeout=300,minproto=5,maxproto=5,direct) mqueue on /dev/mqueue type mqueue (rw,relatime) hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime) debugfs on /sys/kernel/debug type debugfs (rw,relatime) sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime) sunrpc on /proc/fs/nfsd type nfsd (rw,relatime) /dev/sda1 on /boot type xfs (rw,relatime,attr2,inode64,noquota) gvfsd-fuse on /run/user/500/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=500,group_id=500) /etc/auto.misc on /misc type autofs (rw,relatime,fd=6,pgrp=4069,timeout=300,minproto=5,maxproto=5,indirect) -hosts on /net type autofs (rw,relatime,fd=12,pgrp=4069,timeout=300,minproto=5,maxproto=5,indirect) /etc/jabba.nfs on /192.168.0.225 type autofs (rw,relatime,fd=18,pgrp=4069,timeout=120,minproto=5,maxproto=5,indirect) /etc/mothership.nfs on /192.168.0.226 type autofs (rw,relatime,fd=24,pgrp=4069,timeout=120,minproto=5,maxproto=5,indirect) 

file -L -s /dev/mapper/centos_butler-root输出file -L -s /dev/mapper/centos_butler-root ：

 /dev/mapper/centos_butler-root: SGI XFS filesystem data (blksz 4096, inosz 256, v2 dirs)