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. _______________________________________________ Soekris-tech mailing list Soekris-tech@lists.soekris.com http://lists.soekris.com/mailman/listinfo/soekris-tech
