----------------------------------------------------------------------------- Mauna Loa Solar Observatory Observer's Log ----------------------------------------------------------------------------- Tue Jun 27 19:35:09 GMT 2000 Year: 00 Doy: 179 Observer: yasukawa WEATHER COMMENT: Tue Jun 27 19:36:14 GMT 2000 In orographic clouds this morning, currently socked in--fog. **LOW-L PROBLEM**: Tue Jun 27 19:36:46 GMT 2000 Found LOWL crashed this morning, typical "graphics characterss across gui screen"-type crash. Apparently occurred yesterday, 6/26, at 22:33:11 with 36 files on tape. Socked in most of yesterday. Turned everything off and swapped flaky tape drive #1 with the replacement drive I received yesterday before turning lowl back on. Upon power-up, I got the following message on the screen in large characters: 8042 GATE-A20 ERROR SYSTEM HALTED Powered down, checked connections and drive SCS1 settings and powered back up and got same message. Tried a reset from error message state. Lowl program started up and got to its normal wait state. Entered date and time and typed "lowl" command. Gui started up but after flashing a bunch of data-acquisition messages, it stopped at message: tape init tape 0: test error: No tapes on line it then went to message: tape init tape 1: test error: No tapes on line Tried a couple more times after checking drive connections, etc. and got the same results in both modes -- power down/up and just reset. Alerted Steve and Kim. **LOW-L PROBLEM**: Tue Jun 27 20:23:47 GMT 2000 Tried removing the replacement exabyte drive and terminating drive 0. Powered back up. System came back up normally. Powered back down and reconnected replacement drive after a normal halt before powering down. Boot and program start did not go to ERROR message on boot, but crashed when gui went to tape init/test/No tape on line routine again. Powered down, unpacked flaky drive #1 that was ready for return to Tisone, re-installed it in place of the failed replacement drive, and started lowl back up with two drives. System started up OK. Updated Steve and Kim on status. We are currently back to running with only drive #0, with an unlabeled tape in drive #1 as a backup. L00724 was unloaded this morning and data (albeit in solid clouds at this time) is being written to L00725. **LOW-L PROBLEM**: Tue Jun 27 22:05:44 GMT 2000 David suggested trying "mt" commands to test the replacement drive. Reconfigured lowl with replacement drive and tried mt commands. To make a long story short, mt 1 was unable to find any drive 1 connected, and mt 0 failed as long as replacement was connected in system. mt commands worked with both drives when the old flaky drive was put back into system. I also tried running with the replacement drive unterminated, David thought it might be internally terminated and installing the terminator would double terminate it. That was not the case. System is back in our current configuration, L00726 restarted. In fog all this time, so no data loss during testing. COMMENT: Tue Jun 27 22:14:18 GMT 2000 Tapes: No observations all day LOWL: L00725 WEATHER COMMENT: Tue Jun 27 22:15:17 GMT 2000 In very dense fog, cannot see my hand when arm is extended. Tue Jun 27 22:17:20 GMT 2000 MkIV