[Soekris] net6501: SATA disk often fails to spin up

Jukka Salmi j+soekris at 2012.salmi.ch
Sun Sep 2 17:55:25 UTC 2012


Jukka Salmi --> soekris-tech (2012-07-14 09:39:21 +0200):
> Running a net6501-70 board in its rackmount case (with the included
> internal power supply), I'm having troubles with SATA-II disks (Samsung
> HN-M101MBB, which actually seem to be Seagate ST1000LM024; attached to
> J1, J2, JP18): almost always at least one of the disks fails to spin up,
> producing a tapping noise for a second instead of the usual spin-up
> noise.  But sometimes both disks succeed to spin up, and sometimes both
> fail.
> 
> --------------------------------------------------------------------------
> Controller Bus#02, Device#06, Function#00: 02 Ports, 02 Devices
>   Port-00: Hard Disk,
>   Port-01: Hard Disk, ST1000LM024 HN-M101MBB
> --------------------------------------------------------------------------
> 
> --------------------------------------------------------------------------
> Controller Bus#02, Device#06, Function#00: 02 Ports, 02 Devices
>   Port-00: Hard Disk, ST1000LM024 HN-M101MBB
>   Port-01: Hard Disk,
> --------------------------------------------------------------------------
> 
> --------------------------------------------------------------------------
> Controller Bus#02, Device#06, Function#00: 02 Ports, 02 Devices
>   Port-00: Hard Disk,
>   Port-01: Hard Disk,
> --------------------------------------------------------------------------
> 
> --------------------------------------------------------------------------
> Controller Bus#02, Device#06, Function#00: 02 Ports, 02 Devices
>   Port-00: Hard Disk, ST1000LM024 HN-M101MBB
>   Port-01: Hard Disk, ST1000LM024 HN-M101MBB
> --------------------------------------------------------------------------
> 
> Attaching only one of the two disks to one of the SATA ports, spin-up
> also fails most of the time.
> 
> However, if the disks are _not_ connected to the SATA ports, they always
> seem to spin up perfectly.
> 
> Is this a power problem?  Is anybode else seeing this?  What are my
> options, besides not using the disks? ;-)

In the meantime I replaced the Samsung (SATA-2) disks with two Hitachi
Travelstar 5K1000 (SATA-3) disks:

Controller Bus#02, Device#06, Function#00: 02 Ports, 02 Devices                 
  Port-00: Hard Disk, Hitachi HTS541010A9E680                                   
  Port-01: Hard Disk, Hitachi HTS541010A9E680                                   

This seems to have solved my problem, i.e. those disks always spin up
successfully.  Must have been a power problem, I guess.

BTW, some basic test using dd(1) on those disks' raw devices (running
NetBSD/amd64 6.0_BETA2) show read rates of ~ 100 MiB/s and write rates
of ~ 20 MiB/s.  According to some [1]benchmarks that read rate is what
should be expected, but the write rate is suboptimal.  The drive's SMART
values seem to be ok; I only noticed a fastly increasing load cycle
count, and disabling APM rendered it constant but did not increase the
write rate.

Any hints?


TIA & cheers,

Jukka

[1] http://www.tomshardware.com/charts/2012-mobile-hdd-charts/benchmarks,136.html

-- 
This email fills a much-needed gap in the archives.


More information about the Soekris-tech mailing list