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storage

Block device and storage performance

Mobile DevBenchmark Android UFS: fio libaio Guide & Alternatives

Run fio with libaio on Android for raw UFS performance benchmarking, bypassing filesystem effects. Custom NDK builds, root access, sync/psync alternatives, kernel tracing, and vendor tools for seq/rand bandwidth and latency.

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OSHow to Set Up Cold Backup on Two Disks Without RAID

Learn reliable cold backup methods for two local disks avoiding RAID pitfalls. Use AOMEI Backupper, Handy Backup, FreeFileSync, or Robocopy for disk mirroring, cloning, and offline rotation with verification tips.

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HardwareConvert SAS Drive 520 to 512 Sector Size: HGST Guide

Step-by-step guide to reformat HGST HUS723020ALS640 SAS drive from 520-byte to 512-byte sector size. Use IT-mode HBA, sg_format from sg3_utils, vendor tools. Hardware needs, RAID vs HBA, firmware risks explained.

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DevOpsReduce Docker Overlay2 Space Usage: Nextcloud Fix

Learn how to reduce Docker overlay2 filesystem space usage when /var/lib/docker appears to have sufficient space. Fix Nextcloud crashes with targeted overlay2 cleanup strategies.

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