Tech From Alex

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189 reviews & guides.

Home Wi-Fi router and networking gear on a desk
Guides

Best Wi-Fi 7 Routers in 2026

Tri-band Wi-Fi 7 routers with real 6 GHz, multi-gig Ethernet, an honest dual-band budget pick, and a Wi-Fi 6E wait-and-see alternative for 2026 upgrades.

Engineer working on industrial electrical equipment and power electronics in a workshop
Wiki

Double-conversion

Double-conversion (online) UPS topology regenerates AC continuously through AC to DC to AC so the load never rides raw utility power.

CyberPower CP1500PFCLCD PFC Sinewave UPS (1500VA/1000W)
Wiki

AVR

Automatic Voltage Regulation on a UPS boosts or bucks input so brownouts and mild overvoltage get corrected without switching to battery.

Desktop computer tower with open side panel showing drives and components, the kind of multi-disk storage chassis a home NAS uses
Wiki

Btrfs

Btrfs is a Linux copy-on-write filesystem with checksums, subvolumes, and snapshots; Synology DSM and some appliance NAS boxes use it under SHR for point-in-time recovery.

CyberPower CP1500PFCLCD PFC sinewave UPS tower with color LCD, a HID USB UPS NUT usbhid-ups drivers talk to
Wiki

HID UPS

A HID UPS speaks USB HID Power Device class so the OS, NUT, or PowerChute can read battery %, load, and AC status without a proprietary serial dongle.

Rackmount storage array with lit hard drive bays in a server rack, the kind of multi-disk chassis a ZFS pool uses
Wiki

ZFS

ZFS is a copy-on-write filesystem and volume manager with end-to-end checksums, self-healing redundancy, and pool building blocks called vdevs (mirrors and raidz).