Stephenwagner.com Website Review

when running vmware vsphere 6 (and later) and esxi on your hosts with vmfs6, you may notice that auto unmap (space reclamation) is not working even though it is enabled. in addition, you’ll find that manual unmap functions still work. this is because your storage array (san) may have a larger unmap granularity block size than 1mb. vmfs version 6 (source for example, on the hpe msa 2040 the page size when using virtual storage is 4mb, hence auto unmap is not supported and does not work. vsphere 6.5, 6.7 and vmfs 6 – change storage reclaim priority from low to medium or high release unused space on host and guest filesystems with thin-provisioned sophos utm appliance (sw). hpe msa 2040 unresponsive, dead, or failed controller, controller won’t boot. this weekend i came across a big issue with my hpe msa 2040 where one of the san controllers became unresponsive, and appeared to had failed it all started when i decided to clean the msa san. i try to clean the components once or twice a year to remove dust and make sure it’s not getting all jammed up. sometimes i’ll shut the entire unit down and remove the individual components, other times i’ll remove them while operating. because of the redundancies and since i have two controllers, i can remove and clean each controller individually at after cleaning out the power supply’s, it came time to clean the controllers. as always, i logged in to the smu to shutdown controller a (storage). i shut it down, the blue led illuminated it was safe for removal. i then proceeded to remove it, clean it, and re-insert it. the controller came back online, and ownership of the applicable disk groups were successfully moved back. controller a was now completed successfully. i continued to do the same for controller b: i logged in to shutdown controller b (storage). it shut down just like controller a, the blue led removable light illuminated. i was able to remove it, after inserting controller b, the status light was flashing (as if it was booting). i waited 20 minutes with no change. the smu on