All the files in /sys are virtual constructs, based on the kernel data structures.
You may have some storage devices that used to be accessible through the /sys/class/scsi_host/host1 storage controller, but have been yanked away. If /sys/class/scsi_host/host1 is a SAN HBA, it might be that the storage admin has un-presented some LUNs.
Use "lsscsi" or the files in /sys/class/scsi_host/host1 to identify what the second storage controller actually is.
It probably isn't the Smart Array controller: the first storage controller is #0, the second is #1.
If the disks are some un-presented SAN LUNs you no longer need, first find out which /dev/sd* device(s) correspond to them, then use a command like "echo 1 >/sys/block/sdX/device/delete" to tell the system that those devices have been removed on purpose and aren't coming back. Or just reboot.