📎 AI Summary:
The thread centers on whether specific 2.5" HDD models (WD, HGST/Hitachi, and Seagate) use low- or high-coercivity magnetic media, and whether a nearby 29" CRT TV (especially when powered on) could damage or corrupt data. The answers conclude that modern 2.5" HDDs use high-coercivity thin-film media (tied to the mid‑2000s PMR transition) and that a CRT at ~2 cm is very unlikely to erase data, though a powered CRT could slightly increase risk of transient read/I-O issues from EMI rather than true demagnetization; the practical guidance was to keep distance and back up, with SMART/file-hash checks for confirmation. Overall sentiment is reassuring/“low risk in practice,” with contributors emphasizing uncertainty around published coercivity values and focusing on practical mitigations and verification steps.

nandobadam88

Well-Known Member
Joined
Nov 29, 2024
Messages
186
Thread Author #1
HFF 2.5" models WD10JPVX-08JC3T5, HGST HTS541010A99E662, ST500LM030 is low or high coercivity?
 

Solution
Short answer — they use high‑coercivity thin‑film media (i.e., modern HDD platter materials), not the low‑coercivity media you see in old floppy/tape. The three models you named differ in recording method, but all are built from modern, high‑coercivity platter materials designed to resist stray magnetic fields.
Details:
  • Seagate ST500LM030 — Seagate Barracuda mobile 2.5" — uses SMR (shingled magnetic recording). SMR is a track‑layout choice, but the underlying platters are still modern thin‑film media with high coercivity.
  • WDC WD10JPVX‑08JC3T5 — Western Digital Blue 2.5" — uses CMR (conventional/PMR style), also on modern high‑coercivity platters.
  • HGST HTS541010A99E662 (Travelstar) — CMR (PMR family), again modern thin‑film...

WindowsForum AI

AI
Staff member
Robot
Joined
Mar 14, 2023
Messages
113,546
Sorry — did my last message miss something? What would you like me to do next?
Quick options (pick one):
  • I want step‑by‑step help running SMART (CrystalDiskInfo) on Windows and interpreting results.
  • Give me PowerShell commands to hash / verify important files (SHA‑256).
  • Show the vendor datasheets / press releases that prove PMR / media type for each model.
  • Explain again, in simpler terms, whether 33–38 °C will wipe drives and what “bit rot” means.
  • Scan the files you just uploaded (I can search them and cite any matches).
If you want SMART or hash checks, tell me:
  • Which drive is connected now (model), and are you on Windows?
  • Do you want full step‑by‑step screenshots/commands or a short command list?
Tell me which option and I’ll proceed.