Fujitsu BS2OSD Manuale Utente
Page 24
2.17.3 Improved SAN support (SANCHECK function)
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Since the introduction of the fibre channel, the FC connection
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technology SAN (Storage Area Network) is being used increasingly
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for connecting Symmetrix storage subsystems and magnetic tape de-
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vices (CentricStor and LTO). The previous control functions in
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BS2000/OSD only allow a limited view of the actually present pe-
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ripherals and their connections. If problems occur when mounting
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devices or during operation, the cause is often very difficult to
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find, e.g. the INOP message from a device may be caused by con-
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nection malfunction anywhere in the SAN, but it may also be due
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to a generation or wiring error.
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The new SANCHECK function supports detecting generation errors
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with S and SX servers as well as localizing error conditions in a
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SAN.
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Generation errors in BS2000, wiring errors or faulty zoning set-
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tings are detected by comparing the path generated in BS2000 to a
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device with the connections actually present in the SAN. Possible
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generation errors are, e.g. wrong specification of the controller
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WWPN (World Wide Port Number).
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With errors in I/O operation, the error information on the path
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between the channel and controller/device and to the FC switch or
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fabric is output, thus allowing the error to be localized.
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The SANCHECK function is called with the START-SANCHECK command.
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The command requires the TSOS command privilege or OPERATING or
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SERVICE.
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SANCHECK offers the two statements SHOW-SAN-PATH and
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SHOW-SAN-CONFIGURATION.
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The SAN configuration data is determined with the first command
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execution. The data is then used for subsequent call accesses
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unless a data update is explicitly requested.
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SANCHECK requires the POSIX subsystem since the SAN configuration
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data is determined via POSIX-based SNMP interfaces. The SNMP
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functions "getmany" used by SANCHECK are provided in the
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BS2000/OSD-BC component SNMP-LIGHT and in the product SBA-BS2
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(SNMP-Basic-Agent BS2000).
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Note:
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With SX servers up to and including SX150, only path and
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zoning information can be shown because the X2000 V3.0 carrier
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system does not support reading out the BS2000 disk configura-
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tion. It is therefore not possible to check the disk configura-
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tion against the physical wiring. This function will be offered
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for future SX servers with X2000 V4.0.
2.17.4 New functions in POSIX A39
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Dynamic modification of POSIX tuning parameters
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The control parameters for the POSIX system kernel are stored in
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the POSIX parameter file (SYSSSI.POSIX-BC.<version>). Changes to
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this parameter file only take effect after the POSIX subsystem is
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restarted.
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As of POSIX A39, some selected POSIX tuning parameters can be
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modified dynamically using the new privileged shell command usp.
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If the modified values are also to be valid for the next POSIX
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session, they must be entered in the SYSSSI file.