On 11/29/2021 4:04 PM, Lynn McGuire wrote:
>> Hmm, I've had a pair of Seagate 12TB (model: ST12000NM0007) installed
>> for about 18 months now. I monitor all of my drives with Hard Disk
>> Sentinel. Just in the past 3 days the reported health of one of those
>> 12TB drives went from 100% to 59% to 51%. The clock seems to be ticking
>> on that drive and I could lose it sooner rather than later..
> Sounds like it is hammer time !
I found a reference to a previous Seagate incident like that one.
The heads stay in one place when the disk is idle. The air pressure
under the flying head, passing over the track again and again,
pushes the lube off the track and degrades lube properties, until
there is "wear". Does this mean Seagate has taken some backward
step on lube ? Dunno. They stop using truly "liquid" lubes, maybe
30 years ago. Because they could see "ripples" in them :-) Modern
lubes are like a polymer car finish (tough as nails, generally).
For the 6TB Seagate failing that way, the instructions are to
"install firmware update to drive *before* it fails". The purpose of
that, is the drive pushes the head around on its own (and since code
like this has been around forever, they should have done this in the
first place). There have been other drives that do the slow chacha,
to prevent burning the media.
So as long as the track hasn't burned up all the spares, if there
is a firmware update, you might get to keep using the drive. But the
track with the lube failure, maybe the whole thing will end up
spared out at some point.
If it generates physical debris, the drive is less likely to "last".
Once you can't read the firmware load off the platter, you are cooked.
Apparently, on this kind of lube failure, the heads (being as small as
they are), get splattered with debris.
Summary: Check for FW update... before it is too late.