It has been over two years since I blogged about APD handling bug which I discovered, during partial storage outage in my environment. All path down (APD) handling and VMware Component Protection (VMCP) is not working when you have paths physically connected, but they are not able to serve any… Continue reading
As most of the folks in the IT, I’ve spent last couple of days researching about famous Spectre and Meltdown attacks and their possible impact to our infrastructure. These security flaws are especially bad, not only because they’ve been here for more than 2 decades, but mitigation comes with significant… Continue reading
Yesterday, we experienced a problem where we couldn’t install ESXi on the one of ours IBM x3650 M4 servers. We suspected it could be a firmware issue as we performed a complete firmware upgrades just before the installation. If you already had your ESXi installed and did the firmware upgrade… Continue reading
Two weeks ago, we started with regular updates of our Flex system servers, including drivers and firmwares. It is good practice to update drivers first so I followed this procedure as usually. Our update list included ESXi driver for CN4022 (QLogic Broadcom BCM57840). Since IBM/Lenovo doesn’t provide VMware drivers for… Continue reading
It’s been a while since we experienced partial outage on our storage infrastructure running under IBM SVC storage. Few LUNs (vdisks in IBM SVC world) presented from storage went offline. I’m not going into details why it happened as HW problems just happens sometimes. Important thing is how are you… Continue reading
You may already have heard about known issue with Intel Broadwell Family CPUs (Intel Xeon CPU E5-26xx v4 CPUs) where you can hit Exception 14 PSOD if you are running older microcode. If not, you can read about it in kb2146388 From there you can clearly see you need to… Continue reading
Yesterday I did a plan upgrade of our 16-node (4 block) Nutanix 3050 cluster. The version which were running in last couple of months was 4.5.3.2 and the plan was to upgrade to 4.6.3. Using the GUI and the 1-click upgrade we took the following steps: I’ve Downloaded the upgrade… Continue reading
Recently we got access to a 16-node Nutanix cluster with vSphere on top of it. The datastore which was supposed to be used by us was created with Replication Factor 2 and we decided to create another one with RF=3, which provide higher level of data availability by keeping 3… Continue reading
SoftLayer local disk performance SATA/vSAN/SSD What disk performance you can expect from local drives in Softlayer with VMware vSphere6, vSAN & local SATA or SSD drives? This article is here to help you see and decide if performance will be enough for your needs. I have 3 hosts with: hardware… Continue reading
The Virtualist at NetApp Insight 2015 This year we had a chance with Jan Hosek and Michal Klimes to visit NetApp Insight in Berlin as well as VMware VMworld in Barcelona. In this article, we will compare these two events from several different views. Although both companies are not direct… Continue reading
