WD5000BPVT-24HXZT3

[jerovsek]

Hello,

drive spins normally. FW backup is ok by all four heads.
But in DE shows by headmap only heads 0,1,2. On begining read at speed of 45mb/s, then stop reading.

Is it normal that show only 3 heads in DE, but under WD utility 4 and also read normaly from SA.

Thank you

[jerovsek]

I change heads, symptoms remain.

FW backup done without problems(rom, modules and tracks) with normal speed
I create new task in DE. Build headmap,, but headmap shows only heads 0,1,2.
WD marwell shows 4 heads and also read from all of them.

I check donor.Under WD marvell show 4 heads and also under DE shows 4 heads.

When I start reading under DE it reads first 890000 LBA(heads H0, H1, H2) with speed 45MB/s. After 890000(still under H2) stop reading.
I try to read also from back without any result.

Any suggestion

Thank you

[ddrecovery]

I change heads, symptoms remain.

FW backup done without problems(rom, modules and tracks) with normal speed
I create new task in DE. Build headmap,, but headmap shows only heads 0,1,2.
WD marwell shows 4 heads and also read from all of them.

I check donor.Under WD marvell show 4 heads and also under DE shows 4 heads.

When I start reading under DE it reads first 890000 LBA(heads H0, H1, H2) with speed 45MB/s. After 890000(still under H2) stop reading.
I try to read also from back without any result.

Any suggestion

Thank you

It might have 4 physical heads, but only 3 are being used. Can you send some screenshots of the WD Utility window and also a screenshot of the ROM head map screen.

[jerovsek]

Thank you DDRecovery for replay.

Attachments

[data-medics]

Maybe it was at another data recovery company and they tweaked something so it wouldn't work (like changing the head map in ROM).

[jerovsek]

I know owner, and he didn't say that he was in another shop.
Modules from begining to 63 was read by all 4 heads, from 115 only with 0,1
Tracks was read by 0 and 1 from Cyl -256 to Cyl -65

[einstein9]

Hello,

drive spins normally. FW backup is ok by all four heads.
But in DE shows by headmap only heads 0,1,2. On begining read at speed of 45mb/s, then stop reading.

Is it normal that show only 3 heads in DE, but under WD utility 4 and also read normaly from SA.

Thank you

This model has really crazy HM, to cut it short here is what i do:

IF No one touched it before you then you do the following:

-Forget the last Head now.
-Clone/Dump H0 then go for H1 leave the last heads then Scan for Part.

Am assuming the last head has issues (the third) and my best guess this drive has 3 heads only..
change heads if needed.

let us know later about the results..

Good luck

[jerovsek]

Thank you Jared and Einstein9 for help.

I try to image by selective head without success.
It read from 0 to 890049. I can see that read from head 0, then from head 1 and finally from head 2. When come to 890049 with head 2 stop reading.

Behaveor with original heads and with donor heads is same.

If I raw recovery what it read I can see files.
Also under DE it show drive with all partitions, but then is problem to access partitions data.

[BGman]

The drive belongs to ZEPHYR_N family. They have capacity of 750GB for 4 logical heads and 500GB for 3 logical heads.
So your drive has one head cut at factory....

[cpm0088]

Try to do reverse copy mode and see what happens.

[MindMergepk]

try to rebuild ROM from SA and see the difference of active heads...

[jerovsek]

Hello
Thank you for all your suggestions.
I try with another PCB. Now I get also under DE all four heads.
But still no progress with reading.

[cpm0088]

Have you attempted to read via PIO mode (Use hardware retries) and also increase the timeout to something like 10000ms? Sometimes this can help.

[jerovsek]

Hello cpm0088,

I test all heds under PC3000 and all passed test.
I can Access cestors from 0 to 899263(that is the amount of data, which DE read. After 899263 sectors are not accesible.

[cpm0088]

Check the G-List and P-List and see if theres anything unusual, could even be translator is messed up.

[jerovsek]

Hello,

I try also with head editing in RAM, but still I'm unable to get Access to user data

[fzabkar]

@jerovsek, could you upload your ROM? I'm curious as to why one tool reports 4 in-use heads while the other reports 3. Would it be worthwhile to compare the patient and donor resource dumps?

[jerovsek]

Hello Mr. Zabkar,

I work with PC3000.
WD Marwell utility show 4/4 heads with original PCB. In Data Extractor whiich is part of PC3000 it show only 3 heads.
When I write ROM and ROM moduls to donor PCB WD Marwel show 4/4 and also under DE I see 4 heads.
But with original PCB or with donor PCB I can Access only sectors from 0 to 899263.

It looks like something is wrong with translator.

Techno mode key
Techno mode key......................... : Ok

RAM:
HDD Info reading........................ : Ok
Heads number............................ : 4
Cyl Count............................... : 256

Zone allocation table................... : Ok
SA SPT.................................. : 1098

ROM:
Read ROM................................ : Ok
ROM Data size........................... : 256 Kb
Flash ROM dir reading................... : Ok
SA regions address...................... : by default
SA regions address (RAM)................ : by default
Module 02 access........................ : Granted
SA Translator loading................... : Ok

ROM Modules:
ROM version............................. : 65.0AE
ROM F/W version......................... : 0065000A
Overlay F/W version..................... : 65.0AE
Servo F/W version....................... : 05.0C

Heads configuration..................... : by map
Heads number............................ : 4
Heads number in use..................... : 4
Switched off heads...................... : No
Heads map............................... : 0,1,2,3

Service area:
SA dir reading (ID)..................... : Ok
SA Access............................... : Copy 0,Copy 1,Copy 2,Copy 3

Configuration reading................... : Ok
Master Password......................... : has not been set
User Password........................... : has not been set

[pclab]

Could it be that the original headmap was 0,1,3? Like that head 2 can't read nothing,

Can you read from the other heads after that LBA? Can you read last sector?
Have you tried a translator regen?

[jerovsek]

Hello PCLab,

thank you.
As I already write I can Access only this sectors. If I try to read any other sector Access to it is not possible.

In DE it reads from heads 0,1,2