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An incremental backup can approach full-backup size when data churn is high, change tracking resets, scope expands, or repository metrics are misread.

Find silent backup gaps by checking duration, byte counts, exclusions, permissions, incremental chains, credentials, and isolated restore results.

Test a NAS restore safely by using an isolated folder, volume, VM, or spare NAS and validating files, metadata, applications, and recovery time.

Protect readable RAID data before another repair by stopping writes, mapping members, copying critical files, verifying them, and imaging original drives.

RAID capacity still shows the old size after larger-drive replacement? Check rebuild status, member partitions, RAID growth, volume layers, and filesystem.

Separate SATA-link faults from actual drive failure by preserving evidence, comparing SMART error classes, and changing one hardware variable at a time.

A mixed-speed RAID 1 mirror can work, but performance, capacity, thermal behavior, and rebuild time follow the weaker member and the controller's policies.

Diagnose why a RAID array still shows its old usable capacity after larger drives have been installed, then expand each storage layer in the correct order.