calibration issue on WDCMarvell hot-swap

[positivebit]

i am going crazy i can't understand the reason why it happens:

i have got a Mariner WDCMarvell 2,5 (WD5000BEVT-00A0RT0) with several demage in SA.
i was able to extracts by hot-swap (with a drive same model different firmware) modules for data-access and wrote that on the patient (that has got same firmware)

With that drive by Hot-swap i was able to read some sectors but when i forgot to disable hardware reset i had to re-make hot-swap procedure, but the drive can't calibrate.

So i try a hot-swap with another drive same family but different firmware, and the patient can calibrate. why?

[positivebit]

i finally fix this! i had to use DataCompass start/stop motor, to get the drive calibrating after smart hot swap.

Now i am cloning, the power come from salvation-data and the ATA cable goes to PC3000 (when i got calibration i detached ata cable from Data Compass and plugged to ATA-0 in PC3000)

So China-Russia work together! ( a bit costly )

[northwind]

Wow!!!
That's what I call being inventive.
Good job, but... a little strange, isn't it? Maybe some cable problem?

[positivebit]

i think better way to manage stop motor of DC, since this drive has problem in calibration with head #3, and this bring pc3000 to not calibrate ( i am cloning by selective heads becouse head#3 can't almost read anything - will swap later now i am at 50% of cloning )

This drive was judged unrecoverable by an other DR, but when it arrived in my Lab i noticed that i could access to some modules of fw (mostly were demaged and shifted so i lost so many hours to reconstruct them)

[northwind]

Did the other company that claimed drive unrecoverable, try to change heads?

Anyway, good job my friend

[HDD Spaz]

yes, power cable problem I think, my own pc3k sometimes has loose power connection, have to be very careful when hotswapping. New pc3k system is fine, it's just wear and tear of the power cable.

[positivebit]

Did the other company that claimed drive unrecoverable, try to change heads?

Anyway, good job my friend

Yes they changed heads, thanx nortwind!

yes, power cable problem I think

yes - maybe - but honestly i tryed with both ATA ports..and many times... i feel DC manage slightly different, it's only an impression.

just few hours ago, after 60% of cloning, i had to power off, and still DC allowed me ( with difficulties ) to calibrate. (PC3K not again)

By the way it's not only press "start motor" button that i solved that.. still a little fantasy and inventive ( i leave this for your imagination ) and i got again my drive ready to continue the cloning ( now i am at 70% )


What make me fun is to see both machine attached together

[northwind]

yes, power cable problem I think, my own pc3k sometimes has loose power connection, have to be very careful when hotswapping. New pc3k system is fine, it's just wear and tear of the power cable.

I have had a lot of problems with cables in the past, esp. those molex to sata adapters.
After the last incident I have decided to change cables to all machines every two months.