On 07/12/2016 11:52 AM, Hersh wrote: > 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@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@localhost ~]# > [root@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@localhost ~]# fdisk -l /dev/sdc > fdisk: cannot open /dev/sdc: Input/output error > [root@localhost ~]# Sounds like a bad drive. I would start by looking for errors in /var/log/messages and dmesg. You could check the connection cable if anyone has had the machine open.
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