You can no longer rely on that being present.
MarkMLl
Hi!
Where is that information written?
That is new to me.
Winni
GOK, but that particular tree started being deprecated at about the time that IDE discs were moved onto the SCSI subsystem with e.g. a change in the way the buses could be forcibly rescanned to detect hotplugged devices.
The system in front of me- SATA+md on kernel 4.19- doesn't have it, neither do a couple of servers I've just checked, neither does an older system on Debian "Jessie" with 3.16. I don't think I've got anything to hand with "real" SCSI to check, but even there the functionality's been changing since (finger-in-air guess) somewhere around 2.6.
Obviously during that progression things have been added like the /dev/disk tree, but I'm not really sure whether that helps OP since he was specifically asking for identifying/diagnostic info rather than just UUIDs or stuff that was likely to change if a program was moved around.
MarkMLl