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

Peter Neubauer pneubauer at bluerwhite.org
Wed Sep 5 18:33:10 UTC 2012


On 9/2/2012 11:55 AM, Jukka Salmi wrote:
> 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.
>

Regarding the HN-M101MBB, I've seen the same problem with the same 
drives on my net6501.  Enabling PUIS (power up in standby) on the drives 
fixed the issue for me.  I'm not sure if the change in boot timing or 
power demand is the source.  Beware: I don't think the net6501 BIOS can 
boot off drives in standby.  I'm booting off USB to Linux, and the OS 
spins up the SATA drives later.

-Peter


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