Hm... and I assumed you were powering it externally given the huge disk. the caps on the motherboard are I imagine not sufficient to cope with the inrush current requirements of a 3.5" disk.
once you've verified the external power upply source works, one altenative is to power the soekris off a larger internal 5 and 12 volt power supply which can supply the soekris and the disk without passing the disks power through the mainboard. jp10 pin 3 you can put 6-28v on, if you tie it to pin 4 you can put 5v into the soekris. On 02/28/2010 06:00 AM, Henrik /KaarPoSoft wrote: >> >>> Dear all, >>> >>> I have a net5501, which seems to work with a Kingston 64GB SSDnowV+ >>> (SATA) and Seagate Barracuda 7200.7 (3.5" 160GB) SATA. >>> However, I can not get it to work with my Seagate Barracuda ES SATA >>> 3.0Gb/s 750-GB Hard Drive (ST3750640NS). >>> >>> The 750G Barracuda has worked fine for a year in my Dell PowerEdge T105, >>> and I put FreeBSD 8.0 on it using my Dell OptiPlex 8400, where it also >>> works fine. >>> >>> However, when I put the 750G Barracuda in the net5501, it does not get >>> past POST. >>> Most of the time I get to >>> POST 0123456789bcefgh >>> sometimes to >>> POST 0123456789bcefghip >>> and sometimes it even starts to check memory, but does not get past the >>> 0000 Mbyte >>> >>> Once it acutally got past POST and into the ComBIOS, but the drive still >>> not visible. >>> >> >> This, to me, suggests a power issue. When my Soekris supplied wall warts >> started >> to go, I'd get behavior like that on my 5501 with just a CF card. Assuming >> you're powering the drive through the Soekris and it draws more power than >> the >> other two drives, it could be you're over taxing the power supply. You >> could try >> an experiment and try to find a way to power the drive externally. >> >> > Hi Jed, > > Thanks for the suggestion! > > I am an absolute newbee on embedded and power issues ))-: > > According to the specs the SSD will draw 3.5 -4.2 Watts on operation. > The Barracuda 7200.7 160Gb (which works) draws 12 Watts average on > operation according to spec. > The Barracuda ES 750Gb (which does not work) draws 13 Watts average on > operation according to spec. > However, according to specs both the Barracudas draw up to 2.8 amps on > 12V, i.e. a mighty 33.6 Watts on spinup. > So I guess the problem could be that the voltage is dropping during spinup. > > Everything is powered through a 12V, 1.5A C8 power supply (supplied by > Cortex); i.e. 18 Watts. > > I have searched the Soekris specs, but I cannot figure out how much > power the net5501 itself needs, neither how much power it can supply to > the SATA disk. > > Would it make sense to purchase another external power supply (e.g. 12V, > 3A), or does the Soekris net5501 internally limit the possible power to > the SATA disk, now matter what the external power supply can deliver? > > (I don't think I want to experiment with powering the drive "externally") > > /Henrik > > > _______________________________________________ > Soekris-tech mailing list > [email protected] > http://lists.soekris.com/mailman/listinfo/soekris-tech > _______________________________________________ Soekris-tech mailing list [email protected] http://lists.soekris.com/mailman/listinfo/soekris-tech
