SL8500 - Standby HBC Send the Host "LSM Not Ready" Messages When the Service Safety Door is Activated and Then the Access Door is Opened

Asset ID:	1-72-1304145.1
Update Date:	2011-03-21
Keywords:

Solution Type Problem Resolution Sure

Solution 1304145.1 : SL8500 - Standby HBC Send the Host "LSM Not Ready" Messages When the Service Safety Door is Activated and Then the Access Door is Opened

Applies to:

Sun StorageTek SL8500 Modular Library System - Version: Not Applicable and later [Release: N/A and later ]
Information in this document applies to any platform.

Symptoms

6.02/6.04 Firmware
The issue is that the Standby HBC will send the host "LSM Not Ready" messages when a CSE activates the service safety door and then opens the access door.
ACSLS will take all LSMs in the library offline when it receives the "Door Open Message" messages.

Note: HSC receives and post the Door Open message but does take the LSM offline.

Cause

ACSLS never receives any "LSM Ready" messages when the doors are closed, so it will not automatically bring the LSMs back online. The LSMs will stay offline until the customer manually varies all LSMs in the library back online.

Solution

Work round is to vary standby ports offline before activating SSD.

The formal process is to unplug ethernet cables from HBCB and wait 6 minutes after opening the door before replugging.

The procedure that the CSE should follow when they want to access the service area on an SL8500 with 6.0x firmware is:

1. Unplug the Ethernet connections from the 2B and 2A ports on the standby HBC card.
2. Activate the Service Safety Door to move it to the side of the library that you want to access.
3. Open the access door after the SSD has fully engaged. Record the time that you opened the access door.
4. Access the garage and perform any maintenance required.
5. Close the access door.
6. Return the service safety door to its center position.
7. After at least 6 minutes has elapsed since you opened the access door, plug the Ethernet cables back into ports 2B and 2A on the standby HBC.

You must wait at least 6 minutes so the standby HBC card will timeout the Door Open messages in its queue that it is trying to send to the hosts (ACSLS). If you restore TCP/IP communications before this timeout expires, the messages will still be queued, and the standby HBC will send them to the host, which will cause an ACSLS host to take the LSMs offline.

This issue is fixed in 6.05 library code.

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