HP EML E-series Tape Libraries - Manual (Page 19)

Changing the master controller (SIPP master)
One interface controller is assigned by the Interface Manager card as the master controller the
SIPP master. Only the SIPP master is designated to send commands to the library robotics controller.
If multiple interface controllers are present, Command View TL software, through the Cabling View,
can be used to determine which one is acting as the SIPP master. Changing the SIPP master requires
a service-level password and command using the CLI (Telnet or serial). The commands are:
SERVICE L&TTPASSWORD
SET IPCONNECTION INTERFACE MASTER X
, if the IM firmware is i182 or lower
SERVICE L&TTPASSWORD
SET IPCONNECTION MASTER X
, if the IM firmware is I200 or higher
where L&TTPASSWORD is the Library and Tape Tools (L&TT) password and X is the interface
controller number. Obtain the password from the web site
L&TT web site by calling HP Support to
get a 2–day ltt service password. Find the interface controller number by using the SHOW
INTERFACE INFO ALL
CLI command.
If the master interface controller (designated SIPP master) is replaced, the Hardware Replacement
wizard sets up the SIPP master. If the master interface controller (designated SIPP master) is moved
to another interface controller in the library, perform the following manual service steps:
1.
Remove all partitions.
2. Remove all host maps.
3. Log in to the CLI and obtain service-level access.
4. Use the SET IPCONNECTION MASTER X command to make a particular interface controller
the SIPP master. Currently, the Interface Manager card does not automatically failover an
interface controller, even if the previous SIPP master is missing.
5. Reconfigure maps and partitions.
Functional description
The library receives commands and data throughout the SAN from hosts running applications from
approved independent software vendors (ISVs). Host bus adapters (HBAs) in servers send this traffic
over FC links, usually through FC switches. For LTO4 and later tape drives, the traffic goes directly
to the tape drive; but for LTO2 and LTO3 tape drives, the traffic first goes through an interface
controller. One interface controller can connect up to four LTO2 or LTO3 tape drives. For all
libraries, regardless of whether they contain LTO2 and LTO3 or LTO4 and later tape drives, at
least one interface controller is required to pass tape cartridge changer (robotics) commands to
the Interface Manager card over a private network. The Interface Manager card passes these SCSI
commands on to the library robotics controller over the private network, taking advantage of the
error handling and retry capabilities of TCP/IP.
Functional description 19