Comment 6 for bug 1913729

It's `/dev/sg20` for me:

+ SGDEV=sg20
+ test -z sg20
+ sg_turs /dev/sg20
+ RC=5
+ test 5 = 2 -o 5 = 6
+ test '!=' 0
/usr/bin/rescan-scsi-bus.sh: line 257: test: !=: unary operator expected

And this sg20 points to 0:0:2:7 HCTL. I have no idea what it is. It shouldn't exist.
This server has 2 years of uptime. A lot could happen in that time :)

Good to know it isn't a functional problem. Thank you for investigation.