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6/19/2019 Lulu: No security updates available via YUM on cluster. yum updated Crane nfs server(CRAN-19). yum updated all crane workstations; Clean out some crashing log message from Lancaster headnode. (system crashes on 3/2/2019) ; I didn't update Synology and didn't do windows update on server and I didn't do firmware update on Linux workstations. We need do them and forcefsck headnode for next maintenance. kml005 /dev/sdc has some file system issue, I fixed them and it is working now.
11/10/2019 Lulu: No security updates available via YUM on cluster. yum updated Crane nfs server(CRAN-19). yum updated all crane workstations; GPU yum updated has Nvidia driver compilation issue with latest kernel. So I still user second latest kernel. Forced fsck on Synology box.
02/19/2020 Lulu: yum updated Crane nfs server(CRAN-19). yum updated all crane workstations except GPU; no firmware update on Linux workstations. forced fsck on cluster headnode. kml006 is offline because of drive issue. as-chm-cran-12 has I/O error. but it is fine after I reboot the ystem.