Physical storage devices, such as tape and changer devices, not visible when booting RHEL 6.6 or 7.1 with hpsa driver.

Issue

• Not detecting all physical devices behind Smart Array controller after upgrading to RHEL 6.6

RHEL6.5:
# lsscsi -g
[0:0:0:0]    disk    HP       LOGICAL VOLUME   3.52  /dev/sda   /dev/sg1
[0:0:0:1]    disk    HP       LOGICAL VOLUME   3.52  /dev/sdb   /dev/sg2
[0:3:0:0]    storage HP       P410i            3.52  -          /dev/sg0
[1:2:0:0]    tape    HP       Ultrium 5-SCSI   Z39W  /dev/st0   /dev/sg4    <<= physical device (tape)
[1:2:0:1]    mediumx HP       MSL G3 Series    6.20  /dev/sch0  /dev/sg5    <<= physical device (changer), missing in 6.6
[1:3:0:0]    storage HP       P212             3.52  -          /dev/sg3
[2:0:0:0]    cd/dvd  TEAC     DV-28S-W         C.2D  /dev/sr0   /dev/sg6

RHEL6.6:
# lsscsi -g
[0:0:0:0]    disk    HP       LOGICAL VOLUME   3.52  /dev/sda   /dev/sg1
[0:0:0:1]    disk    HP       LOGICAL VOLUME   3.52  /dev/sdb   /dev/sg2
[0:3:0:0]    storage HP       P410i            3.52  -          /dev/sg0
[1:2:0:0]    tape    HP       Ultrium 5-SCSI   Z39W  /dev/st0   /dev/sg4
[1:3:0:0]    storage HP       P212             3.52  -          /dev/sg3
[2:0:0:0]    cd/dvd  TEAC     DV-28S-W         C.2D  /dev/sr0   /dev/sg5

• Missing devices are not detected even after a scsi bus rescan.
• tape library missing after upgrading to 6.6
• tape changer missing after moving to 6.6
• tape library and changer missing in 7.1