I've taken you as far as I can go. Now you will have to experiment a
bit for your use case. I should point out that at least in my system,
the link with the serial number in it shows up even with the line
commented in the rules file.
As always, YMMV.
On Thu, 2019-02-07 at 22:29 +0100, Helmut Drodofsky wrote:
> Hello Ron,
>
> sounds good. I have 2 tape changer. I persume, udev creates the same
> link for both.
>
> Can I modify
> SYMLINK+="changer-$env{ID_SERIAL}"
>
> The serial should be unique.
>
> Viele Grüße
> Helmut Drodofsky
>
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> Am 07.02.2019 um 16:17 schrieb Ron Loftin:
> >
> > On Thu, 2019-02-07 at 10:56 +0100, Helmut Drodofsky wrote:
> > >
> > > Hello,
> > >
> > > mtx and therefor amanda use generic device /dev/sg<x> for tape
> > > changer.
> > >
> > > These devices change on reboot.
> > >
> > > How to make them persistent?
> > >
> > > /dev/sch0 and /dev/sch1 seem to be persistent.
> > >
> > > /dev/tape/by-id/ shows links from WWID to generic device
> > >
> > > An UDEV rule could help? I have not found any example.
> > I had a similar issue when I moved to Mint 18 with the tape device.
> > This works with kernel 4.10 and later. Copy /lib/udev/rules.d/60-
> > persistent-storage-tape.rules to /etc/udev/rules.d and make a
> > change as
> > shown:
> >
> > diff -n /lib/udev/rules.d/60-persistent-storage-tape.rules
> > /etc/udev/rules.d/60-persistent-storage-tape.rules
> > d9 1
> > a9 2
> > SYMLINK+="changer"
> > # SYMLINK+="tape/by-id/scsi-$env{ID_SERIAL}"
> >
> > This created /dev/changer as a link to the /dev/sg<x> device that
> > will
> > be consistent every time the system is booted.
> >
> > >
> > >
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--
Ron Loftin reloftin at twcny.rr.com
"God, root, what is difference ?" Piter from UserFriendly