Weekly Maintenance Log
- May the 4th, 2021 (Star Wars day ;-))
- - Computer
- antenna.iram.es and antennads.iram.es tests for bug fixes.
- - Computer
- Apr. 27, 2021
- - Computer
- MRT VMWare upgrade part III
- nika2-b checks, reboot, diagnostics
- antenna.iram.es changed to get the antenna info from rabbitmq instead of the database in mrt-lx1.
- Add project script to mrt-lx2 PAM session
- - Computer
- Apr. 20, 2021
- - Computer
- Granada VMWare upgrade part II
- antenna.iram.es changed to run on Python 3.9, several other improvements also carried out to this web page.
- mrt-lx2 security patches to kernel, Xorg, other packages (+reboot)
- Installed and tested new synthesizer box (Anapico) for PLL reference. At present only one synthesizer can be used.
- Installation of polycarbonate plates on the RX cabin ceiling ongoing.
- - Computer
- Apr. 13, 2021
- - Computer
- Granada VMWare upgrade part I
- Cleaning up elevator room
- vac1 tests
- nika2-b raid expansion
- Hoisted 3 bottles of lqN2 to Rx cabin. 3 full in Rx cabin, 2 full in garage, 3 empty in garage.
- Checked HERA cooling system
- Checked Emir i2c units for error messages.
- Checked NIKA cooling system.
- - Computer
- Apr. 5, 2021
- - Computer
- Nothing critical
- Replaced old ceiling lamp for installation of water protection polycarbonate plates.
- Polycarbonate plates design was modified but still not installed.
- Prepared VLBI phase noise setup at 230 GHz.
- Prepared with J. Pedro the new Anapico synthesizer box. Work in progress.
- - Computer
- Mar. 30, 2021
- - Computers
- NFS Tests
- Radiolink and fiber failover tests
- Update of the firmware in the MRT and Granada Mikrotiks that are used as "The Dude" servers (10.0.69.100 and 10.0.69.200).
- Checked HERA cooling system
- Checked Emir i2c units for error messages.
- Checked NIKA cooling system.
- Hoisted 3 bottles of N2 to rx cabin.
- Revised water leak situation in Rx cabin with Juan Pedro.
- Revised 192.....66 pc software.
- - Computers
- Mar. 23, 2021
- - Computers
- General maintenance tasks: cleanup logs, replace failed disks etc. Not intrusive as we have tech. time in two days.
- A replacement for NIKA2 array 3 synthesizer has been installed. Test will be done during the next TT on Friday 25th.
- Phase noise test for 1.3mm VLBI has been done in preparation for the coming test with NOEMA.
- Refilled NIKA2 water cooling circuit.
- - Computers
- Mar. 16, 2021
- - Computers
- General maintenance tasks: cleanup logs, replace failed disks etc.
- Checked HERA cooling system
- Checked Emir i2c units for error messages.
- Checked NIKA cooling system
- Investigated 192.....66 machine.
- - Computers
- Mar. 09, 2021
- - Computers
- Move /ncsServer from mrt-lx1 to ncs-nfs (ROLLED BACK)
- Update wiki containers on mrt-lx0 (patches)
- Added disk for docker registry to gra-lx1
- fsck'd all disks on gra-lx1
- recovered failed disk on nika2-b (/ssd stripe)
- fsck disks on nika2-a|b
- Replaced broken synthesizer on array 3 of NIKA2. Very noisy data on array 3 after that.
- After a second synthesizer was installed (on March 10th) the array 3 was again operational.
- Water pressure on NIKA2 He compressors was low. Increased up to 2 bar.
- - Computers
- Mar. 02, 2021
- - Computers
- Backup pruning (the servers are getting full)
- .dbm NFS bug investigation ongoing
- Patch docker daemon on gra-lx1, mrt-lx0, www (security)
- Rebooted www (for security patches and fsck)
- Started NIKA warmup with JLS
- Checked HERA cooling system
- Checked Emir i2c units for error messages.
- Removed Anapico synth from E0
- Investigated problem of communication between pc ...66 and NIKA compressors using a new RS 232 to RS 485 converter (spare NIKA).
- Unit was tested at home using loop feedback and checked out okay, however problem still present.
- Investigated problem with an independent pc and converters but problem still remains. Need to review Labview software.
- Transferred two NIKA adsorber boxes fro garage to cable spiral with the help of Juan Pedro.
- - Computers
- Feb. 23, 2021
- - Computers
- General low-impact maintenance activities
- Prepared Anapico synthesizer for TT on Thursday 25. Hardware was checked.
- Craned 3 N2 bottles to the RX cabin
- Checked NIKA2 water cooling: Refilled water up to 2 bar pressure
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- - Computers
- Feb. 16, 2021
- - Computers
- FP: Attempt at eliminating the use of DBM format in the NCS (replace it with .pickle). Some progress but still many files to go (127 total).
- FP: rotated NCS logs and general maint. on elvin.
- WR: Patches/reboot on ncs-nfs.iram.es
- Checked water leaks in and on top of the receiver cabin
- Investigated problem on NIKA2 control PC (192.168.1.66) for He compressor control. Still not working remotely
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- - Computers
- Feb. 09, 2021
- - Computers
- FP: Attempt at eliminating the use of DBM format in the NCS (replace it with .pickle). Reverted for now.
- All: Support power cut in Granada offices (switching machines off and on, monitor the UPS etc.)
PM: Removed /vis2 mount from mrt-lx1 and mrt-lx3, it is not needed anymore according to AS. The /vis2 was not deleted in the local filesystems just in case. The directory was indeed removed from the NetApp partition.
- WR: Enable Livepatch and unattended-upgrades on ncs-nfs2
- WR: Changed from autofs to manual /etc/fstab entries on mrt-lx6, also disabled unattended-upgrades
PM: Removed old projects accounts from 2010 to 2015 see the list in RemovedOldProjectsAccountsFebruary2021. The old passwd files can be found at /root/remove_old_accounts.
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- - Computers
- Mar. 02, 2021
- - Telescope
- JP: Training M. Castillo about Servos: movement Az, El and Sub. PLC. Remote access
- JP: Tracking failure of the telephone line for reading the electricity counters
- Mar. 09, 2021
- - Telescope
- JP, General maintenance in servo area: motors, fans, lights, stowpins. Revising spindles movement in local, cleaning potentiometers.
- JP, Revising AC Rx cabin, ventilation antenna and tower.
- JP, Checking pilots information LV. Replacing a blown pilot
- Mar. 16, 2021
- - Telescope
- JP, replacement of an antenna motor (El2,M2) within the preventive maintenance (with M. Castillo)
- JP, training M. Castillo of remote antenna movement and associated programs (for main axes, M2 and wobbler)
- Mar. 23, 2021
- - Telescope
- JP, MC, greasing the antenna crown Az and El. By Peri.
- JP, MC, checking UPS autonomy. 15 min with batteries
- JP, MC, modification of pointing model by dP7 = +12"
- JP, MC, minor maintenance: glicol level, AC receiver, ventilation antenna, servos, ...
- Mar. 30, 2021
- - Telescope
- JP, MC, testing Az and El brakes measuring the operative sliping torque and the gap between ferodos
- Apr. 6, 2021
- - Telescope
- JP, MC, checking the emergency limit switches in azimuth and elevation
- JP, MC, identifying failure of ventilator 1 of 5 of the BUS. Replacing motor next week