Linux boot failures are easier to repair when the boot process is treated as a dependency chain. Firmware must find a boot target. A bootloader […]
Systems & Infrastructure
Nutanix NCA v6.10: Prism Central vs Prism Element
Prism Element and Prism Central are both Nutanix management interfaces, but they operate at different boundaries. Prism Element is built into an individual Nutanix cluster […]
Nutanix NCA v6.10: AOS Storage Basics
Nutanix AOS Storage turns the local storage devices inside cluster nodes into a distributed storage fabric for virtual machines and applications. Instead of treating each […]
Nutanix NCP-MCI: Lifecycle Manager
Nutanix Life Cycle Manager, usually shortened to LCM, coordinates supported software and firmware maintenance across Nutanix infrastructure. Its value is not simply that it provides […]
Nutanix NCP-MCI: Disaster Recovery
Nutanix disaster recovery combines replication, protection policies, recovery plans, and orchestrated failover so organizations can recover applications after a site or infrastructure failure. The technology […]
NetApp NS0-005: How ONTAP Storage Architecture Fits Together
ONTAP architecture becomes much easier to operate when the main objects are understood as layers rather than as a flat list of storage terms. Physical […]
NetApp NS0-005: Snapshot, SnapMirror, and FlexClone
Snapshot, SnapMirror, and FlexClone all work with point-in-time data in ONTAP, but they solve different operational problems. A Snapshot preserves a read-only point in time […]
NetApp NS0-521: Fibre Channel SAN on ONTAP
A Fibre Channel SAN on ONTAP is an end-to-end system, not a storage-only configuration. The host HBA, FC switches, zoning, ONTAP target LIFs, initiator groups, […]
NetApp NS0-521: Troubleshooting ONTAP iSCSI
iSCSI troubleshooting on ONTAP is most effective when the path is treated as a sequence of dependencies: host initiator, IP network, ONTAP iSCSI LIF, target […]
NetApp NS0-521: ONTAP SAN Performance Troubleshooting
SAN performance troubleshooting on ONTAP is a correlation problem. The application sees latency, the host sees queueing and device service time, the fabric or IP […]
Huawei H13-611: Storage Fundamentals
Huawei storage fundamentals are easiest to learn as a path from physical media to host access. Drives are protected and organized, storage pools provide capacity, […]
LPI 101-500: Linux Package Management Across Debian and RPM Systems
Linux package management looks simple when the task is only “install this program,” but administrators quickly discover that Debian-family and RPM-family systems expose different command […]
LPI 101-500: Linux Disks and Filesystems
Linux storage administration is easiest to understand as a chain of layers. A disk or virtual block device provides sectors. A partition table divides that […]
Red Hat EX200: RHEL 10 Storage Administration
RHEL 10 storage administration is a layered task: discover block devices, create or resize partitions or logical volumes, build file systems, mount them correctly, and […]
Red Hat EX200: systemd and Journal Troubleshooting on RHEL 10
RHEL 10 uses systemd to manage services, system state, dependencies, mounts, timers, sockets, and much of the boot process. Troubleshooting therefore becomes much faster when […]