Hi, There was some problem with our system so I re-installed the server with CentOS 7. Now, when I am trying to run 'fdisk -l' command, it is returning a broken output. It throws this error- "fdisk: cannot open /dev/sdc: Input/output error". There are valid /dev/sdd and /dev/sde devices which are mounted and they are accessible but, somehow /dev/sdc is having a problem and 'fdisk -l' is not returning the full output. Below is an output of fdisk -l for reference. Any suggestion on how to fix this would be very helpful. ---------------------------- [root at localhost ~]# fdisk -l Disk /dev/sda: 1932.7 GB, 1932735283200 bytes, 3774873600 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: dos Disk identifier: 0x0004118b Device Boot Start End Blocks Id System /dev/sda1 * 2048 1026047 512000 83 Linux /dev/sda2 1026048 3774873599 1886923776 8e Linux LVM Disk /dev/sdb: 1664.6 GB, 1664568262656 bytes, 3251109888 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: dos Disk identifier: 0x00000081 Device Boot Start End Blocks Id System /dev/sdb1 * 63 3251106179 1625553058+ 83 Linux fdisk: cannot open /dev/sdc: Input/output error [root at localhost ~]# [root at localhost ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 50G 4.8G 46G 10% / devtmpfs 63G 0 63G 0% /dev tmpfs 63G 300K 63G 1% /dev/shm tmpfs 63G 18M 63G 1% /run tmpfs 63G 0 63G 0% /sys/fs/cgroup /dev/mapper/MD3200-results 19T 9.0T 9.3T 50% /data/results /dev/sdb1 1.5T 234M 1.5T 1% /share /dev/mapper/centos-home 1.8T 5.5G 1.7T 1% /home /dev/sda1 497M 158M 340M 32% /boot tmpfs 13G 32K 13G 1% /run/user/1000 tmpfs 13G 36K 13G 1% /run/user/0 /dev/sde 917G 625G 247G 72% /media/usb [root at localhost ~]# fdisk -l /dev/sdc fdisk: cannot open /dev/sdc: Input/output error [root at localhost ~]# ------------------------------ Regards Hersh