How to Configure Storage Spaces on Windows Server 2012 R2 Storage Spaces is a software-defined storage technology introduced with Windows Server 2012 and significantly enhanced in Windows Server 2012 R2. It allows administrators to group physical disk drives of varying types and sizes into a storage pool, then carve virtual disks — called storage spaces […]
How to Configure Disk Health Monitoring on Windows Server 2012 R2 Disk failures are one of the most common causes of data loss and unplanned downtime in server environments. Windows Server 2012 R2 provides several built-in mechanisms for monitoring disk health including SMART (Self-Monitoring, Analysis and Reporting Technology) data, storage subsystem event logs, Windows Storage […]
Kubernetes separates storage provisioning (creating storage volumes) from storage consumption (using volumes in pods) through two resource types: PersistentVolumes (PVs) and PersistentVolumeClaims (PVCs). A PersistentVolume is a piece of storage in the cluster provisioned by an administrator or dynamically by a StorageClass. A PersistentVolumeClaim is a request for storage by a user — it specifies […]
Running out of disk space is one of the most disruptive failures a server can experience. When a filesystem fills up, applications crash, log files stop writing (losing audit trails), databases corrupt transactions, and web servers return 500 errors. Proactive disk monitoring is essential — and RHEL 9 provides a full set of tools for […]
The sudo (superuser do) tool allows designated users to run commands with elevated privileges without sharing the root password. This is fundamental to the principle of least privilege: each administrator gets exactly the access they need for their role, no more. When access is misconfigured — for example with blanket ALL=(ALL) ALL entries or unsafe […]
Every time you open a terminal on RHEL 9, Bash reads one or more startup files before presenting you with a prompt. Which files are read depends on whether the shell is a login shell (started by SSH, a console login, or su -) or an interactive non-login shell (a new terminal window in a […]
Swap space acts as overflow memory. When the physical RAM is full, the Linux kernel moves the least-recently-used memory pages to swap on disk, freeing physical RAM for active processes. Without swap, when RAM is exhausted the Out of Memory (OOM) killer terminates processes — often the largest one, which is frequently your database or […]
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