'pvscan' complains about: root@cheetahnew:/root(14)# pvscan /dev/vg0/usr: read failed after 0 of 4096 at 0: Input/output error /dev/vg0/usr: read failed after 0 of 4096 at 51539542016: Input/output error /dev/vg0/usr: read failed after 0 of 4096 at 51539599360: Input/output error /dev/vg0/usr: read failed after 0 of 4096 at 4096: Input/output error PV /dev/md127 VG vg0 lvm2 [1.67 TiB / 0 free] Total: 1 [1.67 TiB] / in use: 1 [1.67 TiB] / in no VG: 0 [0 ] root@cheetahnew:/root(15)# vgscan Reading all physical volumes. This may take a while... Found volume group "vg0" using metadata type lvm2 root@cheetahnew:/root(16)# lvscan ACTIVE '/dev/vg0/var' [8.00 GiB] inherit ACTIVE '/dev/vg0/vtmp' [32.00 GiB] inherit ACTIVE '/dev/vg0/distfiles' [64.00 GiB] inherit ACTIVE '/dev/vg0/opt' [12.00 GiB] inherit ACTIVE '/dev/vg0/home' [898.74 GiB] inherit ACTIVE '/dev/vg0/tmp' [16.00 GiB] inherit ACTIVE '/dev/vg0/ftp' [128.00 GiB] inherit ACTIVE '/dev/vg0/src' [32.00 GiB] inherit ACTIVE '/dev/vg0/portage' [4.00 GiB] inherit ACTIVE '/dev/vg0/data' [512.00 GiB] inherit root@cheetahnew:/root(21)# ll /dev/vg0/ total 0 lrwxrwxrwx 1 root root 7 May 29 23:41 data -> ../dm-9 lrwxrwxrwx 1 root root 7 May 29 23:41 distfiles -> ../dm-2 lrwxrwxrwx 1 root root 7 May 29 23:41 ftp -> ../dm-6 lrwxrwxrwx 1 root root 7 May 29 23:41 home -> ../dm-4 lrwxrwxrwx 1 root root 7 May 29 23:41 opt -> ../dm-3 lrwxrwxrwx 1 root root 7 May 29 23:41 portage -> ../dm-8 lrwxrwxrwx 1 root root 7 May 29 23:41 src -> ../dm-7 lrwxrwxrwx 1 root root 7 May 29 23:41 tmp -> ../dm-5 lrwxrwxrwx 1 root root 8 Jun 10 11:27 usr -> ../dm-10 lrwxrwxrwx 1 root root 7 May 29 23:41 var -> ../dm-0 lrwxrwxrwx 1 root root 7 May 29 23:41 vtmp -> ../dm-1 root@cheetahnew:/usr/src/linux(62)# ll /dev/dm* brw-rw---- 1 root disk 253, 0 May 29 23:41 /dev/dm-0 brw-rw---- 1 root disk 253, 1 May 29 23:41 /dev/dm-1 brw-rw---- 1 root disk 253, 10 Jun 10 11:27 /dev/dm-10 brw-rw---- 1 root disk 253, 2 May 29 23:41 /dev/dm-2 brw-rw---- 1 root disk 253, 3 May 29 23:41 /dev/dm-3 brw-rw---- 1 root disk 253, 4 May 29 23:41 /dev/dm-4 brw-rw---- 1 root disk 253, 5 May 29 23:41 /dev/dm-5 brw-rw---- 1 root disk 253, 6 May 29 23:41 /dev/dm-6 brw-rw---- 1 root disk 253, 7 May 29 23:41 /dev/dm-7 brw-rw---- 1 root disk 253, 8 May 29 23:41 /dev/dm-8 brw-rw---- 1 root disk 253, 9 May 29 23:41 /dev/dm-9 root@cheetahnew:/usr/src/linux(63)# ll /dev/mapper/ total 0 crw------- 1 root root 10, 236 May 29 23:41 control lrwxrwxrwx 1 root root 7 May 29 23:41 vg0-data -> ../dm-9 lrwxrwxrwx 1 root root 7 May 29 23:41 vg0-distfiles -> ../dm-2 lrwxrwxrwx 1 root root 7 May 29 23:41 vg0-ftp -> ../dm-6 lrwxrwxrwx 1 root root 7 May 29 23:41 vg0-home -> ../dm-4 lrwxrwxrwx 1 root root 7 May 29 23:41 vg0-opt -> ../dm-3 lrwxrwxrwx 1 root root 7 May 29 23:41 vg0-portage -> ../dm-8 lrwxrwxrwx 1 root root 7 May 29 23:41 vg0-src -> ../dm-7 lrwxrwxrwx 1 root root 7 May 29 23:41 vg0-tmp -> ../dm-5 lrwxrwxrwx 1 root root 8 Jun 10 11:27 vg0-usr -> ../dm-10 lrwxrwxrwx 1 root root 7 May 29 23:41 vg0-var -> ../dm-0 lrwxrwxrwx 1 root root 7 May 29 23:41 vg0-vtmp -> ../dm-1 I do not have any idea, why there is a /dev/vg0/usr link or /dev/dm-10 device file, if I do not have logical volume /dev/vg0/usr. Maybe there was a logical volume /dev/vg0/usr in the volume group vg0 some years ago in pre systemd times. 'genlop -t systemd' shows that systemd was installed at least with systemd-206 in Jul 2013. What is the best way to handle this, should I remove /dev/mapper/vg0-usr, /dev/dm-10 and /dev/vg0/usr?
five bucks says your hard drive is failing.
