# Crucial M4 512GB 2.5" SATA III Enterprise/Consumer SSD
**Grade A Tested | 75%+ Wear Life Remaining | 0 Bad Sectors | Updated to Final 070H Firmware**Up for sale is a genuine, high-endurance **Crucial M4 512GB 2.5-inch SATA SSD** (Part: CT512M4SSD2).Unlike modern budget consumer SSDs that cut corners with DRAM-less architecture and fragile TLC/QLC flash, the Crucial M4 is legendary among homelab enthusiasts, storage engineers, and retro builders for its industrial-grade build quality and long-term write endurance.---### The Reliability Advantage: Micron 25nm Synchronous MLC NAND
- **True Multi-Level Cell (MLC):** Built with genuine Micron 25nm synchronous MLC NAND flash (2 bits per cell). It delivers 3,000 to 5,000 native program/erase (P/E) cycles—far outlasting modern TLC (500–1,000 cycles) and cheap QLC (150–300 cycles).
- **Dedicated Hardware DRAM Cache:** Powered by the proven Marvell 88SS9174 8-channel processor paired with dedicated onboard DDR DRAM cache. You will never experience the catastrophic write-speed throttling common on cheap DRAM-less drives during sustained file transfers.
- **Exceptional Write Endurance:** Heavy logging, Proxmox virtualization, TrueNAS boot arrays, or persistent database duty won't burn out this flash array.---### Verification, Health & Testing (Guaranteed Specs)
Every drive has been individually inspected via low-level S.M.A.R.T. diagnostics and sanitized with a full hardware discard/TRIM pass:- **Flash Wear Life Remaining:** **75% or higher** (SMART Attribute 202).
- **Defect / Health Integrity:** **0 Reallocated Sectors**, **0 Pending Sectors**, and **0 Program/Erase Failures**.
- **Firmware Status:** Fully updated to Crucial's **final official 070H firmware release** (permanently eliminating the historical 5,184-hour power-on bug found on unpatched factory firmware).
- **Sanitization:** Factory sanitized via native hardware block discard (`blkdiscard`). Completely unallocated, wiped clean, and ready for immediate deployment.---### Serial Numbers & Verification
Tested drives currently in stock from this verified lot:
- `0000000012330912C6CE` (80% Health | 0 Bad Blocks | FW: 070H)
- `00000000111202018B29` (76% Health | 0 Bad Blocks | FW: 070H)
- `00000000111202018B74` (75% Health | 0 Bad Blocks | FW: 070H)*(Select your quantity at checkout. Drives are packed and shipped in individual anti-static shielding bags).*---### Shipping & Handling
Ships securely enclosed in an anti-static ESD bag and packed with ample bubble wrap via USPS Ground Advantage with tracking provided within 1 business day.