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udev-rules: make tape devices also accessable by ENV{ID_SCSI_SERIAL}
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
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@ -9,6 +9,11 @@ ENV{UDEV_DISABLE_PERSISTENT_STORAGE_RULES_FLAG}=="1", GOTO="persistent_storage_t
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SUBSYSTEM=="scsi_generic", SUBSYSTEMS=="scsi", ATTRS{type}=="8", IMPORT{program}="scsi_id --sg-version=3 --export --whitelisted -d $devnode", \
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SYMLINK+="tape/by-id/scsi-$env{ID_SERIAL}"
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# iSCSI devices from the same host have all the same ID_SERIAL,
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# but additionally a property named ID_SCSI_SERIAL.
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SUBSYSTEM=="scsi_generic", SUBSYSTEMS=="scsi", ATTRS{type}=="8", ENV{ID_SCSI_SERIAL}=="?*", \
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SYMLINK+="tape/by-id/scsi-$env{ID_SCSI_SERIAL}"
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SUBSYSTEM=="scsi_generic", SUBSYSTEMS=="scsi", ATTRS{type}=="8", IMPORT{builtin}="path_id", \
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SYMLINK+="tape/by-path/$env{ID_PATH}-changer"
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@ -18,8 +23,10 @@ KERNEL=="st*[0-9]|nst*[0-9]", ATTRS{ieee1394_id}=="?*", ENV{ID_SERIAL}="$attr{ie
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KERNEL=="st*[0-9]|nst*[0-9]", ENV{ID_SERIAL}!="?*", SUBSYSTEMS=="usb", IMPORT{builtin}="usb_id"
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KERNEL=="st*[0-9]|nst*[0-9]", ENV{ID_SERIAL}!="?*", SUBSYSTEMS=="scsi", KERNELS=="[0-9]*:*[0-9]", ENV{.BSG_DEV}="$root/bsg/$id"
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KERNEL=="st*[0-9]|nst*[0-9]", ENV{ID_SERIAL}!="?*", IMPORT{program}="scsi_id --whitelisted --export --device=$env{.BSG_DEV}", ENV{ID_BUS}="scsi"
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KERNEL=="st*[0-9]", ENV{ID_SERIAL}=="?*", SYMLINK+="tape/by-id/$env{ID_BUS}-$env{ID_SERIAL}"
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KERNEL=="nst*[0-9]", ENV{ID_SERIAL}=="?*", SYMLINK+="tape/by-id/$env{ID_BUS}-$env{ID_SERIAL}-nst"
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KERNEL=="st*[0-9]", ENV{ID_SERIAL}=="?*", SYMLINK+="tape/by-id/$env{ID_BUS}-$env{ID_SERIAL}"
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KERNEL=="st*[0-9]", ENV{ID_SCSI_SERIAL}=="?*", SYMLINK+="tape/by-id/$env{ID_BUS}-$env{ID_SCSI_SERIAL}"
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KERNEL=="nst*[0-9]", ENV{ID_SERIAL}=="?*", SYMLINK+="tape/by-id/$env{ID_BUS}-$env{ID_SERIAL}-nst"
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KERNEL=="nst*[0-9]", ENV{ID_SCSI_SERIAL}=="?*", SYMLINK+="tape/by-id/$env{ID_BUS}-$env{ID_SCSI_SERIAL}-nst"
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# by-path (parent device path)
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KERNEL=="st*[0-9]|nst*[0-9]", IMPORT{builtin}="path_id"
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