PS3 CECHA01 (Phat) — HFW 4.91.1 installed — Evilnat 4.92.2 CEX update fails at ~75%

[stormbringer]

Hi everyone,
I'm looking for help updating my PS3 and I want to include all details + everything I already tried.
Console / Firmware

• Model: PS3 Phat CECHA01
• Current firmware: HFW 4.91.1 installed
• Target update: CFW 4.92.2 Evilnat Cobra 8.5 (CEX)

Update Method

• Updating via USB (not internet)
• PS3 detects the update correctly:
  • Shows "Version 4.92.2 Evilnat [CEX]"
  • Location: USB Device
• USB folder structure is correct:
  • USB:\PS3\UPDATE\PS3UPDAT.PUP

USB Setup

I tried 2 different USB drives, both FAT32:

• Formatted in Windows as:
  • FAT32
  • Allocation unit size: Default
  • Label: PS3_SACD
  • Tried quick format (I can do full format too if needed)

Where it fails

The update begins copying normally, but fails during the copy phase around:

• ~60% one attempt
• ~75–77% repeatedly (most consistent)

Then I get:

• "The data is corrupted. (8002F2C5)" in safe mode

What I already tried

Tried both USB drives
Tried different USB ports (including right-most port near the HDD)
Tried the Recovery Menu (Safe Mode) update, not just XMB
Confirmed the PUP filename is correct: PS3UPDAT.PUP
Confirmed file size looks correct (~194MB)
Question

Given that:

• the PS3 detects the update properly,
• the update starts,
• but fails consistently at ~75%, "The data is corrupted" error occurs during install (seen 8002F2C5 and 8002F957 on different attempts), usually failing around ~75–77%.,

What should I try next?

Possible suspects I'm wondering about:

• Bad USB compatibility?
• PS3 HDD problem / bad sectors?
• Something about my current HFW 4.91.1 install preventing this update path?
• Should I update to OFW 4.92 first and then apply CFW?
• Should I install from Recovery Menu using a different PUP (Hybrid/OFW first)?

Any guidance would be hugely appreciated — I've been working on this for days and want to do this the cleanest/least risky way.
Thanks in advance.

Quick update — we replaced the internal HDD this morning and repeated the update attempts.
Current status:

• Console: PS3 Phat CECHA01
• Current firmware: HFW 4.91.1 installed
• Target: CFW 4.92.2 Evilnat Cobra 8.5 (CEX)

USB method:

• Updating via USB (not internet)
• PS3 detects the update correctly (shows "Version 4.92.2 Evilnat [CEX]")
• USB folder path confirmed:
  USB:\PS3\UPDATE\PS3UPDAT.PUP

What changed:

• New HDD installed
• USB drive full formatted again (FAT32, 28GB)

Where it fails now:

• Update starts copying normally but fails consistently at ~69%
• Error shown: "The data is corrupted. (8002F957)"

Next step I'm planning to try:

• Install OFW 4.92 first, then HFW 4.92.1, then retry CFW 4.92.2 Evilnat

If anyone has additional suggestions (USB formatting/MD5 verification/BD drive considerations/etc.), I'd really appreciate it — been working on this for several days.
Thanks!

 

[GuilloteTesla]

You didn't apply the flash exploint for CFW. Follow MrMario's tutorial:

 

[stormbringer]

Thank you for the guidance and the tutorial. I have successfully installed CFW 4.92.2 Evilnat Cobra 8.5 [CEX]