--- description: "IODD TRIM Tool is a universal Windows utility designed to improve SSD write speeds and lifespan for any external USB drive. It supports BOT, UASP, Full Device, and Free Space TRIM operations." --- # 🧹 IODD TRIM Tool **Version**: 0.2.0.4 **Platform**: Windows 10 / 11 (64-bit) **License**: Freeware ## 1. Overview The **IODD TRIM Tool** is a Windows-exclusive application designed to send TRIM commands to **external SSDs connected via a USB-SATA bridge**. While Windows automatically performs TRIM on internal SATA/NVMe SSDs, it often fails to do so for external USB SSDs. This tool resolves that issue, helping to maintain write performance, extend SSD lifespan, and ensure consistent response times. > **Universal Compatibility**: This tool is **not limited to IODD products**. It supports **all external USB SSDs** from any manufacturer, provided the USB bridge supports ATA Pass-Through or SCSI UNMAP. ## 2. Key Features * **3-Step TRIM Strategy**: Automatic fallback routing from `DSM TRIM` → `SCSI UNMAP` → `ATA Pass-Through` to ensure maximum compatibility. * **BOT/UASP Support**: Fully supports both Bulk-Only Transport (BOT) and USB Attached SCSI Protocol (UASP). * **Flexible TRIM Modes**: * **Full Device TRIM**: Completely wipes the SSD. *(Warning: ALL data will be permanently deleted!)* * **Free Space Only TRIM**: Performs TRIM only on empty space, keeping your existing files perfectly safe. * **Real Test & Speed Chart**: Verifies if TRIM is actually working by performing a file write/delete/verify sequence. It records write speeds at 2-second intervals and plots them on a time-series chart. * **Drive Inspection**: Provides detailed information on disk partitions, volumes, cluster sizes, and free space fragmentation. * **Multilingual Support**: Supports 8 languages (English, Korean, Japanese, Chinese, Spanish, German, French, Russian). ## 3. System Requirements * **OS**: Windows 10 / 11 (64-bit) * **Privileges**: **Administrator privileges required** (Crucial for sending SCSI Pass-Through commands directly to the disk). * **Connection**: Any SSD connected via a USB-SATA bridge. ## 4. VirusTotal Scan Result - File name: `iodd_trim_tool-0.2.0.4.zip` - Scan date: `2026-03-10` - SHA-256: `07ecb130c7725c2706ec7c8ad722908273360197417c97c843086ac2bacae191` - Detection: `0/67` - Verdict: No security vendors flagged this file as malicious - VirusTotal link: https://www.virustotal.com/gui/file/07ecb130c7725c2706ec7c8ad722908273360197417c97c843086ac2bacae191 ## 5. Changelog & Version History ### v0.2.0.4 (Latest) * **Real Test Improvements**: Added a pre-TRIM step before file creation to optimize SSD write performance. * **Write Speed Chart**: Added a 2-second interval time-series speed chart recorded during tests, viewable via the "Speed Chart" button with CSV export support. * **Enhanced Speed Drop Detection**: Replaced fixed-window average with Exponential Moving Average (EMA) for highly accurate sudden speed drop detection. * **Logging & UI**: Added TRIM result logging with batch/sector statistics. Displayed total disk sectors alongside GiB in Drive Inspection summary. ### v0.2.0.3 * **Advanced UASP TRIM**: Implemented the robust 3-stage UASP TRIM strategy (`DSM TRIM` → `SCSI UNMAP` → `ATA Pass-Through`). * **SCSI UNMAP Fallback**: Added single-descriptor fallback when multi-descriptor batches are rejected by the bridge. ### v0.2.0.2 & v0.2.0.1 * **UI Enhancements**: Added "Size (GB)" and percentage displays for Free/Used Sectors in the Inspect tab grid. * **Bug Fixes (v0.2.0.1)**: Resolved 25 crucial issues including thread-safety fixes, UI deadlock prevention, and SCSI sense data parsing corrections. ### v0.1.0.x (Initial Releases) * Introduced dual-path TRIM strategy (UASP and BOT). * Added logical drive selector for Real Test and read-only drive detection. * Initial rollout of Free-space CSV export and 4-step write/delete/TRIM/verify test cycles. --- ## 5. Contact & Support If you have any questions, encounter issues, or need further assistance with the IODD TRIM Tool, please reach out to: * **Email**: [kbs@iodd.kr](mailto:kbs@iodd.kr)