TCS ALPHA REPLACEMENT for the INT

In the WHT Computer Room (It's not needed anymore)

• Shut down LPAS3 using the SHUT account from a telnet or LAT session; the SHUT account cannot be used from the Alpha's console. Take all defaults.
• When LPAS3 is shut down (blue screen with >>> prompt), power it off.
• Disconnect all cables except for the one connecting the external disk enclosure. Disconnect the disk enclosure from the tape drive, but keep its power lead. Make sure it has a SCSI terminator, as you will need it at the INT. 
• Check that the CAMAC driver PCI card is installed. This card should be directly below the monitor connection and has approx 140 pins. It is intended that a card will always be installed in LPAS3. If the card is not present install one, spare cards are currently kept in a drawer of the desk in the far right-hand corner of the WHT Computer room.
• Transport LPAS3's system box, external disk enclosure and cables to the INT Clip Centre. Be gentle. Too much vibration can cause boards/chips to come unseated.

• If LPAS2 is still running, shut it down using the SHUT account as above. Answer the questions as appropiate (spin down the disk volumes, no automatic reboot). Power off LPAS2.
• Power off the external disk unit.
• A spare LPAS2 harware is on top of actual LPAS2
• Disconnect the cables from LPAS2 and reconnect to spare LPAS2.
• A picture of LPAS2 in the clip centre.
• On the CAMAC system crate (directly below the Alpha), on the yellow Branch Coupler (BR CPR 4-1) switch from ON LINE to OFF. Pull the switch out 2mm to move it.
• Power off the CAMAC system crate and wait for at least 10 seconds.
• Power on the CAMAC system crate and wait for the fans to run up.
• On the Branch Coupler (BR CPR 4-1), press the branch initialise switch, then switch from OFF to ON LINE.
• C and Z the HYTEC 1386 CAMAC Interface/Controller.
• Power on the external disk unit. Then power on spare LPAS2: it will boot automatically. Watch the screen to see which version of VMS is booting. If it is not booting VMS 7.3-2, then press CTRL-P to interrupt the boot process and wait for the >>> prompt to appear. (You may have to press CTRL-P more than once.) Then type boot dka200 and check that it boots VMS 7.3-2 .
• Wait for spare LPAS2 to complete booting (a 'System startup complete. You may now start the TCS' message will appear on the console when it has booted).

In the INT Control Room

• Start the TCS as normal, remembering to log in to LPAS2.
• Check that UT and ST are updating in the TCS DISPLAY window, and check that the encoder values look sensible with the PAGE ENC command.
• Shutdown the Unix observing system with shutdownobssys, this removes the DRAMA connection to LPAS2 (if not done already).
• Restart the observing system with startobssys, ignore error messages about failure to connect to TCS on LPAS2.
• Set up the connection to the TCS with the command online TCS@LPAS2 This makes the connection for this session only and must be repeated each time the observing system is started until the software group change the configuration (see below).
• Check that the Unix observing system communicates with the TCS, using the command tcs page to change the TCS info display page.
• Perform general checks on the TCS. Check also the headers are collected.

In case of problems see TCS help

Notes for software group

• On the INT ICS sparc login as intsm. Edit the file /int/etc/nodes.INT and set the tcs_node to LPAS3. This will make the Unix observing system talk to the TCS on LPAS3 permanently.
• If there are problems with communication or header collection, login to LPAS3 as TCSMGR.
• For communication problems, check that the DRAMA port number is 50002 with the command type [INT_LOGIN]IMP_STARTUP.LPAS3.
• For header collection problems, check that the Unix ICS /int partition is mounted on LPAS3. Use the command SHOW DEV D and check that a disk with device name _DNFSn and volume label INT is mounted. This partition is mounted at boot time by SYS$SYSROOT:[SYSMGR]TCS_STARTUP.COM, also when the TCS starts up it will dismount and remount the partition.
• To make previous CALIBRATE results available, restore reduced data files from LPAS2 directory [INT.DATA.CALIBRATE]*.RED . Currently only the most recent are used. CFG may be able to restore from backup or mount disk from defunct lpas2.

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