david.barker@LIGO.ORG - posted 15:03, Friday 25 September 2026 - last comment - 15:05, Friday 25 September 2026(92071)
Replace h1seiex frontend computer
Jonathan, EJ, Erik, Dave:
WP13653 h1seiex computer replacement
Last night's crash of h1seiex was different from the two previous that day in that dmesg logged ECC RAM error correction issues. We opened WP13563 to replace the computer rather than just the memory DIMMs so we could test this computer offline in the DTS.
Erik and I replaced the W2245 computer with one from the spare pool, which had been running in production as h1sush2a until it was removed in Dec 2025 during the IFO upgrade. Since the replacement computer already had 4 Adnaco cards installed, we just moved the Mellanox GigE card from the old to the new computer.
| Removed computer (W2245) | SN 200601707 |
| Installed computer (W2245) | SN 200601708 |
Erik changed the BIOS to enable PERR/SERR reporting and changed the IPMI IP address.
We took the opportunity to remove the long-range-dolphin-ethernet test machine which had been left at EX at the end of that testing. We also removed the old h1cdsrfm's adnaco expansion tower enclosure (and the shelf it was sitting on) which is no longer needed.