Re: CAM: extract HDD informations about failure/to fail?

Perhaps if you log r/w queue length for all 4 drives with a reasonable
interval (say 1 second) under the load using gstat(8) and plot all 4 as
function of time on the same graph you should have no problem to visually
identify the culprit(s). At least that's how I would do it.

-Maksym

On Sun, Nov 27, 2022, 7:15 AM FreeBSD User <freebsd@walstatt-de.de> wrote:

> Hello,
>
> well, the aim of my post sounds strange, but I'm serious.
> Background: I run at home a 14-CURRENT based server with a ZFS volume
> (RAIDZ) comprised from
> 4x 4 TB HDD. A couple of days I had to exchange the HGST NAS drives since
> one got a permanent
> SMART error. So all HDDs have been replaced by now with four times Seagte
> IronWolfe Pro 4TB
> drives. So far, so good.
> Now I face a weird sound sourcing at one of the new HDDs. The box is
> supposed to be a heavy
> duty poudriere build facility, so the drives are up 24/7. It seems that
> one (or even more)
> drives emitt a weird sound like the spindle motor is loosing for a
> fraction of a second power
> and spiining up the the drive again. Searching the net reveals that at
> least one Seagate
> customer did have the same issue and he provided an audio file of that
> very weird sound, to be
> found here:
>
> Post at reddit:
>
> https://www.reddit.com/r/techsupport/comments/sca6al/seagate_ironwolf_pro_making_weird_noise/
>
> and herin the post of the audio file:
>
>  https://www.mediafire.com/file/x3le816qsakiff9/Hdd.mp4/file
>
> I checked S.M.A.R.T for any unusual data, but everything is fine. The
> values for
>
> Power_Cycle_Count
> Power-Off_Retract_Count
> Start_Stop_Count
>
> seem all within a reasonable range compared to the life time in hours (did
> some simple
> statistsics ), nothing looks unusual.
>
> Also, the advanced view onto each drive via
>
> smartctl -x
>
> doesn't give me any hint of a power failure as a source for the noise.
>
> So, big question here is: the drives are attached to a HBA, LSI3008 based
> SAS9300-8i. Is it
> possible to retrieve via CAM more health paramteres than those gathered by
> SMART/smartmontools
> and if the answer is yes, how can this be achieved?
> It close to impossible to isolate the drive making the noise. My guts tell
> me to RMA the
> supposed to be faulty drive and not to wait until it dies from "spindle
> motor desease" or
> something that is the source for the noises.
>
> Thanks in advance,
>
> oh
>
>
> --
> O. Hartmann
>
>