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

Average Latency would also do the trick.

Warner

On Tue, Nov 29, 2022 at 2:20 PM Maxim Sobolev <sobomax@freebsd.org> wrote:

> 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 So all HDDs have been replaced by now with four times Seagte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
>>
>>