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Tape and tape changer devices from Amazon Webservice Storage Gateway VTLs and maybe other iSCSI VTLs all have the same ENV{ID_SERIAL}. The results is, that only the last device is available in /dev/tape/by-id/, as the former devices have been overwritten. However, the devices can be distinguished by ENV{ID_SCSI_SERIAL}. ENV{ID_SCSI_SERIAL} is not set on directly connected SCSI devices. This rule additional creates links based on the ENV{ID_SCSI_SERIAL}, if it is set. In my case, it creates (ID_SCSI_SERIAL) /dev/tape/by-id/scsi-AMZN_SGW-6BF81D02_MC_00001 /dev/tape/by-id/scsi-AMZN_SGW-6BF81D02_TD_00001 /dev/tape/by-id/scsi-AMZN_SGW-6BF81D02_TD_00002 ... instead of only (ID_SERIAL) scsi-2414d5a4e5f5347572d364246