How storage form factors, interfaces, protocols, file systems, and RAID layouts solve different performance, compatibility, and recovery needs.
Storage terminology describes different layers. A drive can fit physically yet remain incompatible when its interface or protocol is unsupported.
| Layer | Examples | Meaning |
|---|---|---|
| Form factor | 2.5-inch, M.2 | Physical dimensions and connector format |
| Interface | SATA, PCIe | Electrical connection to the host |
| Protocol | NVMe | Command protocol used by many PCIe SSDs |
| File system | NTFS, exFAT, FAT32 | How an operating system organizes a formatted volume |
An M.2 slot does not, by itself, guarantee NVMe support. Check the device documentation for the supported interface and protocol before selecting a drive.
| Layout | Main characteristic |
|---|---|
| RAID 0 | Striping for capacity or performance; no redundancy |
| RAID 1 | Mirroring for redundancy across two or more members |
| RAID 10 | Mirrored stripes; redundancy and performance, requiring multiple drives |
RAID does not replace a separate backup. It does not protect against accidental deletion, ransomware, or a site-wide incident.
When SMART or operating-system diagnostics indicate a possible drive problem, prioritize a verified backup or data recovery plan. Detection in firmware, partitioning, formatting, and file-system capability are distinct checks; do not format a questionable drive merely because it has been detected.