Why do I see errors during bootup like "ERROR: ddf1: seeking device "/dev/dm-8" to 18446744073709421056" and "ERROR: ddf1: reading /dev/sde[Input/output error]" in RHEL?

Issue

• Why do I see multiple "ERROR: seeking device" and "ERROR: reading device" errors during bootup like the following?

RHEL 6

ERROR: ddf1: seeking device "/dev/dm-8" to 18446744073709421056
ERROR: hpt37x: seeking device "/dev/dm-8" to 4608
ERROR: hpt45x: seeking device "/dev/dm-8" to 18446744073709547008
ERROR: pdc: seeking device "/dev/dm-8" to 137438913024
ERROR: pdc: seeking device "/dev/dm-8" to 137438920192
ERROR: pdc: seeking device "/dev/dm-8" to 137438927360
ERROR: pdc: seeking device "/dev/dm-8" to 137438934528
ERROR: sil: seeking device "/dev/dm-8" to 18446744073709289984
ERROR: asr: reading /dev/sde[Input/output error]
ERROR: ddf1: reading /dev/sde[Input/output error]
ERROR: ddf1: reading /dev/sde[Input/output error]
ERROR: hpt37x: reading /dev/sde[Input/output error]
ERROR: hpt45x: reading /dev/sde[Input/output error]
ERROR: isw: reading /dev/sde[Input/output error]
ERROR: jmicron: reading /dev/sde[Input/output error]
ERROR: lsi: reading /dev/sde[Input/output error]
ERROR: nvidia: reading /dev/sde[Input/output error]
ERROR: pdc: reading /dev/sde[Input/output error]
ERROR: pdc: reading /dev/sde[Input/output error]
ERROR: pdc: reading /dev/sde[Input/output error]
ERROR: pdc: reading /dev/sde[Input/output error]
ERROR: sil: reading /dev/sde[Input/output error]
ERROR: via: reading /dev/sde[Input/output error]
ERROR: asr: reading /dev/sdb[Input/output error]
ERROR: ddf1: reading /dev/sdb[Input/output error]
ERROR: ddf1: reading /dev/sdb[Input/output error]
ERROR: hpt37x: reading /dev/sdb[Input/output error]
ERROR: hpt45x: reading /dev/sdb[Input/output error]
ERROR: isw: reading /dev/sdb[Input/output error]
ERROR: jmicron: reading /dev/sdb[Input/output error]
ERROR: lsi: reading /dev/sdb[Input/output error]
ERROR: nvidia: reading /dev/sdb[Input/output error]
ERROR: pdc: reading /dev/sdb[Input/output error]
ERROR: pdc: reading /dev/sdb[Input/output error]
ERROR: pdc: reading /dev/sdb[Input/output error]
ERROR: pdc: reading /dev/sdb[Input/output error]
ERROR: sil: reading /dev/sdb[Input/output error]
ERROR: via: reading /dev/sdb[Input/output error]

RHEL 7

May 26 15:49:39 hostname rhel-dmraid-activation: ERROR: pdc: reading /dev/dm-5[Input/output error]
May 26 15:49:39 hostname rhel-dmraid-activation: ERROR: pdc: reading /dev/dm-5[Input/output error]
May 26 15:49:39 hostname rhel-dmraid-activation: ERROR: pdc: reading /dev/dm-5[Input/output error]
May 26 15:49:39 hostname rhel-dmraid-activation: ERROR: pdc: reading /dev/dm-5[Input/output error]
May 26 15:49:39 hostname rhel-dmraid-activation: ERROR: sil: reading /dev/dm-5[Input/output error]
May 26 15:49:39 hostname rhel-dmraid-activation: ERROR: via: reading /dev/dm-5[Input/output error]