2014-04-01 | 0 comments
# pcs cluster unstandby pollux1 Error: node ‘pollux1’ does not appear to exist in configuration I hit this error message from Pacemaker pcs util while trying to bring nodes out of standby after having put them into that state with … Continue reading
2014-03-30 | 0 comments
It’s likely that your distribution already has mechanism(s) for periodicially running mdadm array checks but occasionally it’s useful/nessicary to force an immediate verifcation pass. A check of a Linux mdadm/device-mapper array is initiated by echoing a command into the coresponding … Continue reading
2013-06-07 | 0 comments
(Or, How to migrate all GPFS filesystem metadata to SSDs) IBM’s general advice [as of 2012] when setting up a new non-tired GPFS filesystem is to lean towards spreading data & metadata across all LUNs. See Data & Metadata in … Continue reading
2013-06-06 | 0 comments
LSI’s MegaRAID series of SAS RAID controllers will halt the system boot process when loading the cards option ROM (what LSI call’s the controller’s BIOS), if there are any “errors” detected. Manual intervention is needed to get the system boot … Continue reading
2013-06-06 | 0 comments
I discovered this morning upgrading from MegaRAID Storage manager 12.08.03-03 -> 13.04.03-01 that the RPM for the old package wasn’t being removed. An example is below. Note that I’ve created local YUM repos for the LSI provided RPMs. # yum … Continue reading