Hitachi HDS721010CLA332 reads first ~5M sectors only

[andyfied]

Hello

I had this drive (Hitachi HDS721010CLA332) with faulty read/write heads. The heads have been transplanted with an exact donor (clean air room of course). Using PC3000 had difficulties reading the drive ID but going around it I managed to get it. The drive read only the first approximately 5 million sectors only then stopped reading. While the drive is still calibrating, the heads are fine. I have checked the drive modules and all the important ones are okay.

Has anyone else had this problem before?

Thanks in advance

[mr_spokk]

Could still be weak heads, SA tracks a wider than user tracks, thats why you can read. Try to read through utility in DE.

[Green Slime]

Could be a PSHT issue (Plist). Tried reading both copies separately and see if any have errors. PC3000 will sometimes just fill in bad areas with zeros to get a working one but this could cause some areas not to line up so you can't read.

[andyfied]

Thank you for the replies, but the heads have been transplanted from a brand new drive so definitely they are fine.

With Hitachis, I am aware that the PList is very sensitive to damage, but this one is perfectly fine.

I'm still a bit stuck here... Hitachis are all awkward

[andyfied]

I think I cracked it...

First I tried to use the P-List from NV-RAM, but it said it could not find it. Then I copied the P-List from the NV-RAM to the service area and it started working!

Thanks again for your help!

[pcimage]

Does the drive ID perfectly fine in PC3K, or do you have to "kick start" it with the PC3K Hitachi ARM utility?

[pepe]

P-List from the NV-RAM

i might be missing something here...

[Amarbir[CDR-Labs]]

P-List from the NV-RAM

i might be missing something here...

Respected Pepe Sir ,
Exactly i had the same question .BS The NVRAM Does Not Have Plist

[pepe]

yeah, not what i know of...