Average Latency would also do the trick. Warner
On Tue, Nov 29, 2022 at 2:20 PM Maxim Sobolev <sobo...@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 <free...@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 So all HDDs have been replaced by now with four times Seagte 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 >> >>
