NSR WWID Presentation

[Jack Trachtman]

We hava an m2402 NSR connecting our MSL5026
jukebox to the SAN.

Is there any way to get the WWID and LUN
assigned to each SCSI SDLT drive? I've
gone through the NSR screens and don't
see this info.

TIA

[generic_1]

Log into your switch if it is Brocade based(brocade resells through many vendors), and do a switchshow. That will show the wwn of your ports.

[Steven Clementi]

Jack:

I will be able to tell you exactly if you can find it in the NSR's web gui tomorrow, but you can look it up in the name server on your SAN Switch.

As Jeff suggests, on the Brocade switches you can run the command switchshow while telnet'ed into the switch, or you can look at the name server while browsing the web gui.

Cisco switches have a "nameserver" as well, but I remember it being just a "display" of devices attached to the switch...not sure about McData Switches.

If you have a brocade switch, you can also get the wwid by entering the zoning GUI and expanding the port on the switch that the nsr is connected to.


Steven

[Uwe Zessin]

The FC LUN assignment is in the "mapping" section, but there can be several mapping tables. You need to find out which host uses which table.

I don't recall if the NSR assigns a 128-bit WWN in SCSI page 83(16) to a LUN, if that's what you mean by "WWID". I have never see it before and I am afraid you would need to run a SCSI inquiry on the host to find out.

The port WWNs are visible through the NSR's character interface (telnet or serial port) as well. Whether they are visible through the WEB interface, I don't remember, sorry.

[Steven Clementi · Accepted solution]

hrmmm... reading this again, I believe your looking for something else other then the WWID of the NSR itself, which can be found all those ways I posted earlier.

I will take a look tomorrow at the tape drive properties, but i do not think physical drives get a WWID assigned to them like disk storage. Just a lun/id number.

One thing to try is using the hba utilites. SANSurfer for Qlogic cards, Lightpulse Utility for Emulex cards. This is assuming you have a windows environment. I am not sure if these utilites work on any other OS. I am sure there are some utilitis though for other os's.

Steven

[Jack Trachtman]

Sorry, let me clarify a bit (it's always
difficult to decide what info to include).

I am managing VMS systems. A SHOW DEV/FULL
cmd for a tape drive will include the line:

WWID 02000008:500E-09E0-0009-98B9

We all too often have to replace a failed SDLT drive and it would be useful for me if I could see the WWID that gets assigned to the drive at the NSR so I can compare it to what VMS sees. Thnx

[Uwe Zessin]

That's one of the NSR's WWPNs, I guess. I don't have a VMS system handy right now, but the mapping to the $2$MGAu: device name is at least partly based on the tape drive's serial number stored in SCSI page [80(16) ?]. I think the mapping is in file: SYS$SYSTEM:SYS$DEVICES.DAT (or something similar).

[Jack Trachtman]

Uwe,

The WWID I've shown is not the NSR port number but, as you mentioned, the WWID created by the NSR for the tape-drive based on some combination of SCSI ID and tape-drive serial ID (so it changes when a tape-drive is swapped). Yes, this WWID does show up in SYS$DEVICESD.DAT, but I'm still interested in seeing the WWID at the NSR for comparison to what VMS sees. Thx