About Us

RSInfoMinds, a web based IT Training and Consultancy firm. It is established with high dreams in training people in IT Infrastructure Field. We provide Online and Class Room training in various fields of IT Infrastructure Management.

Join Us: http://www.facebook.com/RSInfoMinds
Mail Us: rsinfominds@gmail.com
Twitter: @RSInfoMinds

We are specialized in the below courses:

Redhat Linux Admin Redhat Linux Cluster
Redhat Virutualization IBM AIX Admin
IBM AIX Virtualization IBM AIX Cluster
HP Unix Admin HP Unix Cluster
HP Unix Virtualization Shell Scripting
Veritas Volume Manager Veritas Cluster
Oracle Core DBA VMWare


We provide training in such a way, So that you get in depth knowledge on the Courses you look for.

And we ensure you are very confident from each and every Techincal aspect that the IT Industry needs and expects from you.

We also conduct Workshops on the latest technology and the real time faculties sharing their work experiences to make you the best.

Wednesday, 3 September 2014

/dev/sdb: read failed after 0 of 4096 at 0: Input/output error

When a storage unit is longer available to the Linux Server, You would see the following error message:

[root@node1 /]# pvs
  /dev/sdb: read failed after 0 of 4096 at 0: Input/output error
  /dev/sdb: read failed after 0 of 4096 at 2147418112: Input/output error
  /dev/sdb: read failed after 0 of 4096 at 2147475456: Input/output error
  /dev/sdb: read failed after 0 of 4096 at 4096: Input/output error
  PV                VG       Fmt  Attr PSize  PFree
  /dev/mapper/disk1          lvm2 a--   1.00g 1.00g
  /dev/mapper/disk2          lvm2 a--   1.00g 1.00g
  /dev/mapper/disk3          lvm2 a--   1.00g 1.00g
  /dev/sda2         vg_node1 lvm2 a--  19.51g    0
[root@node1 /]#

To fix the issue, We need to delete the corresponding /dev/sdb file from OS Level.

[root@node1 /]# echo 1 > /sys/block/sdb/device/delete

[root@node1 /]# pvs
  PV                VG       Fmt  Attr PSize  PFree
  /dev/mapper/disk1          lvm2 a--   1.00g 1.00g
  /dev/mapper/disk2          lvm2 a--   1.00g 1.00g
  /dev/mapper/disk3          lvm2 a--   1.00g 1.00g
  /dev/sda2         vg_node1 lvm2 a--  19.51g    0
[root@node1 /]#