Strange Seagate problem

[jono-ats]

With PC3000 UDMA:

I'm working with a Seagate ST330831AS that stays in busy mode and will not come ready. I've tried two different PCBs, transplanting the ROM each time.

The drive spins up but I can't detect a seeking noise. I have not opened it.

Here's the odd thing: If I remove the PCB from the drive, serial access works fine and the ROM can be read and written. However, once I put the PCB back on the drive the serial access will time out and I can't access terminal mode.

If I do a power cycle within the utility, this is the message in Terminal:

Interface task reset
4096 x 16 buffer detected
Tonka-1_Disk S.00 01-11-05 11:50

However, the drive comes out of busy and all of the user commands time out.

What gives?

Thanks

Jon

[beto]

Hello jono my suggest check the platters we had check , many seagate´s with tendence to head crash

If I remove the PCB from the drive, serial access works fine and the ROM can be read and written. However, once I put the PCB back on the drive the serial access will time out and I can't access terminal mode.

Maybe u got a shortcut between PCB and MHA, maybe there are some problems a shorcut on the MHA; last year we got a Hitachi problem, on that case i put a piece a paper between the MHA flex connection and PCB, to know the problem and the solution

Best Regards

Alberto

[jono-ats]

Thanks, Alberto. I'll try the paper over the MHA contacts. Some drives require communicating with the MHA before they will POST and spin up. I seem to remember that Seagate is one of them, but I'll soon find out.

Jon

[thinclient]

I have same problem for the segate ts3250823ace db35.1 family harddisk.

can you have get any solution for your poblem?

thanks
amit shah

[jono-ats]

If I recall correctly, there was a short in either the VCA or the head stack that caused this problem.

Jon

[N.C.]

Jon, i vote for you have some preamp problem.

I suggest, to replace, and try it again....


Regards,
Janos