问dd崩溃-该怎么办？

EN

我跑了几个小时后，dd就崩溃了。通常带有这样的消息

Input/output error
68424+1 records in
68424+1 records out
342124883968 bytes (342 GB) copied, 5114.68 s, 66.9 MB/s

我能做点什么吗？有什么办法可以使用输出吗？还是重新启动它停下来的地方？

是否有任何理由认为这是因为正在使用备份的分区？

它总是崩溃在70-80%左右，通常是当分区应该少使用的时候.

由于这个过程需要很长时间，所以很难尝试不同的东西。

我输出到一个图像。我可能需要一个分区，但涉及到LVM：

sudo lvmdiskscan
/dev/centos/swap [       3.89 GiB] 
/dev/sda1        [     500.00 MiB] 
/dev/centos/root [      50.00 GiB] 
/dev/sda2        [     465.27 GiB] LVM physical volume
/dev/centos/home [     411.38 GiB] 
/dev/sdb1        [     931.51 GiB] 
3 disks
2 partitions
0 LVM physical volume whole disks
1 LVM physical volume


dd conv=sync,noerror if=/dev/centos/home bs=2000000   of=/run/media/ob/X_1T_Media1GHD-PCTU3/c/sd9e22_cel.image
dd: error reading '/dev/centos/home': Input/output error
171062+1 records in
171063+0 records out
342126000000 bytes (342 GB) copied, 4625.3 s, 74.0 MB/s
220856+2 records in
220858+0 records out
441716000000 bytes (442 GB) copied, 6138.1 s, 72.0 MB/s

星期五早上ddrescue --sector-size=2048 --cluster-size=$((256*512)) --sparse --verbose /dev/centos/home /run/media/ob/X_1T_Media1GHD-PCTU3/c/sd7c_dd.image /run/media/ob/X_1T_Media1GHD-PCTU3/c/sd7c_dd.map

GNU ddrescue 1.18.1 About to copy 441714 MBytes from /dev/centos/home to /run/media/ob/X_1T_Media1GHD-PCTU3/c/sd7c_dd.image Starting positions: infile = 0 B, outfile = 0 B Copy block size: 131072 sectors Initial skip size: 32 sectors Sector size: 2048 Bytes

Press Ctrl-C to interrupt rescued: 441714 MB, errsize: 8192 B, current rate: 0 B/s ipos: 342124 MB, errors: 1, average rate: 60675 kB/s opos: 342124 MB, run time: 2.02 h, successful read: 9 s ago Finished

但extundelete sd7c_dd.image --restore-directory /home/ob/p -o /tmp/tt extundelete: Bad magic number in super-block when trying to open filesystem sd7c_dd.image

/dev/mapper/centos-home on /home type xfs (rw,relatime,attr2,inode64,noquota)