This is the rules file, I will have to spend some time going through it.
Thanks.
*> cat /lib/udev/rules.d/60-persistent-storage-tape.rules*
*# do not edit this file, it will be overwritten on update*
*# persistent storage links: /dev/tape/{by-id,by-path}*
*ACTION=="remove", GOTO="persistent_storage_tape_end"*
*ENV{UDEV_DISABLE_PERSISTENT_STORAGE_RULES_FLAG}=="1",
GOTO="persistent_storage_tape_end"*
*# type 8 devices are "Medium Changers"*
*SUBSYSTEM=="scsi_generic", SUBSYSTEMS=="scsi", ATTRS{type}=="8",
IMPORT{program}="scsi_id --sg-version=3 --export --whitelisted -d
$devnode", \*
* SYMLINK+="tape/by-id/scsi-$env{ID_SERIAL}"*
*SUBSYSTEM!="scsi_tape", GOTO="persistent_storage_tape_end"*
*KERNEL=="st*[0-9]|nst*[0-9]", ATTRS{ieee1394_id}=="?*",
ENV{ID_SERIAL}="$attr{ieee1394_id}", ENV{ID_BUS}="ieee1394"*
*KERNEL=="st*[0-9]|nst*[0-9]", ENV{ID_SERIAL}!="?*", SUBSYSTEMS=="usb",
IMPORT{builtin}="usb_id"*
*KERNEL=="st*[0-9]|nst*[0-9]", ENV{ID_SERIAL}!="?*", SUBSYSTEMS=="scsi",
KERNELS=="[0-9]*:*[0-9]", ENV{.BSG_DEV}="$root/bsg/$id"*
*KERNEL=="st*[0-9]|nst*[0-9]", ENV{ID_SERIAL}!="?*",
IMPORT{program}="scsi_id --whitelisted --export --device=$env{.BSG_DEV}",
ENV{ID_BUS}="scsi"*
*KERNEL=="st*[0-9]", ENV{ID_SERIAL}=="?*",
SYMLINK+="tape/by-id/$env{ID_BUS}-$env{ID_SERIAL}"*
*KERNEL=="nst*[0-9]", ENV{ID_SERIAL}=="?*",
SYMLINK+="tape/by-id/$env{ID_BUS}-$env{ID_SERIAL}-nst"*
*# by-path (parent device path)*
*KERNEL=="st*[0-9]|nst*[0-9]", IMPORT{builtin}="path_id"*
*KERNEL=="st*[0-9]", ENV{ID_PATH}=="?*",
SYMLINK+="tape/by-path/$env{ID_PATH}"*
*KERNEL=="nst*[0-9]", ENV{ID_PATH}=="?*",
SYMLINK+="tape/by-path/$env{ID_PATH}-nst"*
*LABEL="persistent_storage_tape_end"*
On Sun, Jan 27, 2019 at 3:14 AM Adam Nielsen wrote:
> > There are symlinks for the archive devices but not the tape drive control
> > devices which is what the tape alert commands need.
>
> Ah I see, you need the /dev/sg* equivalent for the /dev/st* in use.
>
> Can you copy the udev rules that produce symlinks for the autochangers
> (see link in my last post) and tweak them so that they also work for the
> drives themselves? It looks like they pick up anything that's a
> "type 8" device so if you duplicate the rule but change it to whatever
> type number that tape drives are, presumably you'd end up with the same
> result.
>
> > My only other idea is that maybe you could create a script that rewrites
> > the bacula-sd.conf every boot by parsing the output of this command as it
> > shows which sg* devices correspond to the st* ones:
>
> If you wanted to do that it might be easier to have the script
> create/update symlinks in /dev so you don't need to rewrite the Bacula
> config file. But this is pretty much what udev does already so better
> to get that working if you can.
>
> Cheers,
> Adam.
>
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