Hi Guys, I have a few questions about this disk as I have limited experience with these drives.

IBM Ultrastar IC35L036UWD210-0

The disk does not spin, I can hear feint clicking sounds from when I put my ear to it. I thought it might have been stiction of seized motor. Motor is not seized and heads correctly parked.

I ordered an identical donor drive, same part no, model no, MLC. Donor drive works fine on the scsi card. The jumper settings are identical for both drives. I changed pcb's, bad drive with donor pcb still does not spin, good drive with bad pcb does not spin but feint clicking sounds.

I have looked at pcbs, it seems these have the same nv-ram chip as the hitachi travelstars (please correct me if I'm wrong).

My questions are..

do these drives have unique nv-ram? If NV-ram is unique, would that prevent spin up if wrong pcb is attached to drive? I believe it might be a burnt out spindle motor so a platter swap may be required, has anyone else seen burnt out motor on these drives or encountered the problem I have described?

Any help will be great. You can also PM if you don't want the info to go public.

Thanks.

Anyone?

Sometimes i had a check at some models of Hitachi will be a shorcut on MHA wich prevent spin, u can tried to put a piece of paper under the Conection betwen HDA, and PCB, and tried to turn on u can tried using the patient PCB

Regards

Thanks for the info. I have just tried the above, same result. I am thinking spindle motor has failed. Will now attempt platter swap.

Check resistance of motor windings. I do not believe this drive has unique NVRAM. This drive is one of the later IBM models, just before the Hitachi transition.

Oh, and please tell me you checked the jumper on it? This drive can be configured different ways, from spin on power on, spin on power on+delay (LUN * X seconds), to spin on Motor Start command from SCSI interface.

In my experience also, IBM SCSI drives sometimes will not spin if not connected to SCSI bus. My 36LZXs won't. Call me old school, but I've found in the past (pre FDB) that you can tell a lot about a drive by listening to it spin at idle in a silent environment, as well as feeling the vibration in your hand. I used to use a small plug in test transformer for this, with Molex connector on it and current/voltage display on the transformer unit. I used to send any drive that didn't sound to my approval back, without further testing. You can hear a WD instantly, and they still (except Scorpio) generally sound like s**t. Anyway, I was on the brink of sending them back, had IBM on the phone, explained that the drive didn't spin regardless of motor jumper setting, even with SCSI disconnected. The lady I talked to said that some firmware versions of the drive checks for ground or potential or continuity (I forget what exactly) on certain pins detected at the SCSI connector and if not it will not spin at all.

The donor drive I have spins fine when connected. Same jumper settings on bad drive. I will try hot swap before I do anything else.

Hot swap on SCSI drive? Interesting. Never thought of that. Let me know if it works. SCSI drives don't all support sleep.