ACSLS - SL150 Cannot be Detected by ACSLS After the Server is Rebooted

Asset ID:	1-72-1616116.1
Update Date:	2018-01-03
Keywords:

Solution Type Problem Resolution Sure

Solution 1616116.1 : ACSLS - SL150 Cannot be Detected by ACSLS After the Server is Rebooted

Applies to:

Sun StorageTek Auto Cartridge Sys Lib SW (ACSLS) - Version 8.2 to 8.3 [Release 8.0]
StorageTek SL150 Modular Tape Library - Version All Versions and later
Oracle Solaris on SPARC (64-bit)
Oracle Solaris on x86-64 (64-bit)

Symptoms

A new tape library SL150 is connected to the server and install_scsi_sol.sh is run for ACSLS 8.2 to detect the tape library.

However, whenever the server is rebooted, ACSLS is not able to detect SL150. install_scsi_sol.sh has to be run again.

The special character file:

/devices/pci@8,600000/SUNW,qlc@2/fp@0,0/mchanger@w500104f000d19bb5,1:character

is missing after reboot (and re-created after install_scsi_sol.sh)

That same ACSLS server also has a L700 library connected the same way, through the same FC HBA. The issue does not appear with the L700.

Changes

New SL150 library configured with ACSLS

Cause

By default MPxIO is enabled for the entire system.

This does not affect the L700 library, but only affect the SL150 library, because SL150 is bridged with the first drive (and/or this library is seen as LUN 1 by the system).

Solution

Disable MpxIO for this specific SL150 library.

Here are the steps to disable MpxIO:

A.) edit /kernel/drv/scsi_vhci.conf file as follows:

     device-type-scsi-options-list =
     "STK     SL150", "disable-option";
      disable-option = 0x7000000;

     NOTES:
      1. The first line above already exist in the file. Remove the comment from that first line above and add the last 2 lines.
      2. Ensure there are exactly 5 spaces after STK before typing in SL150.

B.) Reboot the server with the following commands:
     # touch /reconfigure
     # shutdown -g0 -y -i6

References

<NOTE:1320623.1> - Bridged Libraries - Netbackup SG Driver Fails to Attach to Media Changer When Solaris mpxio is Enabled
<NOTE:1453145.1> - Solaris sgen driver unable to grab library device due to mpxio control being enabled.

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