请教linux下 T 数量级磁盘丢失磁盘空间的问题

Posted 2023-03-09

参考技术A dd分别进行造数据也没有问题。
但服务器一重启，/dev/sdb1 可以正常挂载，但/dev/sdb2，却只有800多G，显示：
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 2.0G 411M 1.5G 22% /
none 1011M 0 1011M 0% /dev/shm
/dev/sda7 21G 77M 20G 1% /home
/dev/sda3 4.9G 42M 4.6G 1% /tmp
/dev/sda2 9.7G 3.4G 5.8G 37% /usr
/dev/sda5 4.9G 112M 4.5G 3% /var
/dev/sdb1 4.7T 43G 4.6T 1% /data1
/dev/sdb2 868G 109M 824G 1% /data2
用fsck进行修复时，貌似提示超级块丢失：
fsck /dev/sdb2
fsck 1.35 (28-Feb-2004)
e2fsck 1.35 (28-Feb-2004)
/dev/sdb2 is mounted.

WARNING!!! Running e2fsck on a mounted filesystem may cause
SEVERE filesystem damage.

Do you really want to continue (y/n)? yes

/dev/sdb2: recovering journal
The filesystem size (according to the superblock) is 231128461 blocks
The physical size of the device is 197831039 blocks
Either the superblock or the partition table is likely to be corrupt!
Abort<y>? no