Hi,
I had similar issues with my collection of scsi tape drives, not all of
which may be powered up.
the --page=0x80 does the trick.
my kernel is compiled with the SG version4 block device option enabled.
this is my 60-persistent-storage-tape.rules, hope it helps
ACTION!="add|change", GOTO="persistent_storage_tape_end"
# type 8 devices are "Medium Changers"
KERNEL=="sg[0-9]*", SUBSYSTEMS=="scsi", ATTRS{type}=="8",
IMPORT{program}="scsi_id --sg-version=3 --page=0x80 --export
--whitelisted -d $tempnode",
SYMLINK+="tape/by-id/$env{ID_VENDOR}-$env{ID_MODEL}-$env{ID_SERIAL_SHORT}"
SUBSYSTEM!="scsi_tape", GOTO="persistent_storage_tape_end"
KERNEL=="st*[0-9]|nst*[0-9]", ATTRS{ieee1394_id}=="?*",
ENV{ID_SERIAL}="$attr{ieee1394_id}", ENV{ID_BUS}="ieee1394"
KERNEL=="st*[0-9]|nst*[0-9]", ENV{ID_SERIAL}!="?*", SUBSYSTEMS=="usb",
IMPORT{program}="usb_id --export %p"
KERNEL=="st*[0-9]|nst*[0-9]", ENV{ID_SERIAL}!="?*", SUBSYSTEMS=="scsi",
KERNELS=="[0-9]*:*[0-9]", ENV{BSG_DEV}="$root/bsg/$id"
KERNEL=="st*[0-9]|nst*[0-9]", ENV{ID_SERIAL}!="?*",
WAIT_FOR="$env{BSG_DEV}", IMPORT="scsi_id --page=0x80 --whitelisted
--export --device=$env{BSG_DEV}", ENV{ID_BUS}="scsi"
KERNEL=="st*[0-9]", ENV{ID_SERIAL}=="?*",
SYMLINK+="tape/by-id/$env{ID_VENDOR}-$env{ID_MODEL}-$env{ID_SERIAL_SHORT}"
KERNEL=="nst*[0-9]", ENV{ID_SERIAL}=="?*",
SYMLINK+="tape/by-id/$env{ID_VENDOR}-$env{ID_MODEL}-$env{ID_SERIAL_SHORT}-nst"
# by-path (shortest physical path)
KERNEL=="st*[0-9]", IMPORT{program}="path_id %p"
KERNEL=="st*[0-9]", ENV{ID_PATH}=="?*",
SYMLINK+="tape/by-path/$env{ID_PATH}"
LABEL="persistent_storage_tape_end"
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