LTO - Port Speed Shows 3 Gbit for FC drives (SL500, HP LTO3-5 drives), Latest Firmware on Drives

Asset ID:	1-72-1560861.1
Update Date:	2017-05-22
Keywords:

Solution Type Problem Resolution Sure

Solution 1560861.1 : LTO - Port Speed Shows 3 Gbit for FC drives (SL500, HP LTO3-5 drives), Latest Firmware on Drives

Applies to:

HP LTO3 Tape Drive - Version All Versions and later
HP LTO4 Tape Drive - Version All Versions and later
HP LTO5 Tape Drive - Version All Versions and later
HP LTO6 Tape Drive - Version All Versions and later
Sun StorageTek SL500 Modular Library System - Version All Versions and later
Information in this document applies to any platform.

Customer is using Windows and has in fact opened the SR to request a link to the latest drivers because the drives are showing many i/o errors.
I have already searched KM for a description of this (including a very generic search for anything showing 3 gbit, but there's nothing, not even a description of SAS drives).
LTO drives in two SL500 libraries running 1409 firmware. There are four kinds of drives in there: LTO5, LTO4, LTO3 2Gbit, LTO3 4Gbit. All drives are FC, all drives are HP. Drives are running the latest firmware.

Symptoms

Port Speed Shows 3 Gbit for FC drives (SL500, HP LTO3-5 drives), Latest Firmware on Drives.

1409 firmware supports LTO5 fully, including reporting of 8 Gbit speed. When checking the drive details, however:
Device Id : 0,2,2,9 General Drive Type : HpUltrium3 Code Version : M6BS/012.861 Vendor : HP Serial Number : HU108366R4 Interface Type : Fibre Drive Configuration ***THE DRIVE MUST BE IN A CONFIGURABLE STATE*** LVD Target ID : n/a World Wide Name Node : 500104f000xxxxxx Port A World Wide Name : 500104f000xxxxxx

Port A Enabled : true Port A Loop ID (use 126 for soft addressing) : 126 Port A Speed (GB) : 3 Port A Link Status : n/a Port B World Wide Name : 500104f000xxxxxx Port B Enabled : true Port B Loop ID (use 126 for soft addressing) : 126 Port B Speed (GB) : 0 Port B Link Status : n/a

Port speed is detected and shown as 3 for all 4 Gbit and 8 Gbit tape drives. This is definitely not right, and probably signifies some error, correct?

Cause

Error in interpretation of information.

Solution

In the ODS dump file, engineering uses a number scheme and not the actual the port speed. In SLC (Streamline Library Console), it converts the assigned number to the actual port speed that the port is negotiating at.

So the breakdown of the numbers that they use are the following:

1 = 1Gb
2 = 2Gb
3 = 4Gb
4 = 8Gb

The customer's LTO4 and LTO5 drives are both negotiating at a 4Gb port speed which can be double checked in SLC.

Attachments

This solution has no attachment