[Elphel-support] the problems from the hdd (in short)

[Andrey Filippov]

Carlos,

>From you photos it does not look that any pins are broken, no pads from the
PCB are peeled off, so any computer/electronics repair shop (or hobbyist
with the fine parts soldering skills) can easily put the connector back.

SATA external disk - we did not have problems with any, except the old SSD
made of the CF cards inside. The Axis ETRAX processor (used in the camera)
has a flaw in the UDMA implementation, and many (actually most) CF cards do
not have just DMA - they have a bug in the controller chip. But then, the
controller chip manufacturer made it to falsely respond that it does
support DMA (needed for the camera) and that lie usually stays undetected,
because nobody needs DMA when they have UDMA. Nobody but those who have the
UDMA bug in the processor :-(

Anyway - that was the only problem we had with the SATA deveces so far.
Format - use EXT2 and don't make too large partitions (use 100-200GB) -
larger partitions need more RAM that is a valuable resource for 64MB camera
system memory. Additionally - keep the number of files in the same
directory not too large - even for the normal computers it takes a while to
open folders with many files.

Andrey

On Sat, Feb 4, 2012 at 8:28 AM, Carlos Padial <palidoestudio2 at gmail.com>wrote:

> hi oleg
>
> Ok, i have removed the black piece from the 103692, now i see it like
> in the wiki
>
> So you are saying its posible to reuse the black conector soldering
> back to the 10369? wouldn't it be better to find a new black piece
> (from the diagram i supose its the one called J6 CF/HDD adapter) i
> mean because of the broken pins.
>
> now i have removed the hdd enclosure and the wire. The camera works fine.
> we want to try the sata external conexion, some recomendations?
> what format must have the disk? it should be automatically detected?
>
> best regards
> carlos
>
>
> > You (or the repairer) need to carefully take out the connector (that
> black
> > thing) from 103692 and have it soldered back to the 10369. I attached
> > pictures from wiki and marked with red the places where it should be
> > soldered. The bottom side is soldered in 2 points to hold the connector.
> > Andrey talked about this.
> >
> > Soldering back the connector should be pretty easy for those who repair
> > electronics (PC/phones).
> >
> >>
> >> do you think it's risky to use the camera in this conditions?
> >
> >
> > I wouldn't have the cable (especially with the unsoldered connector) not
> > fixed inside the camera - it can cause a short circuit. What you can do
> is
> > take the top part, disconnect the cable from 103692 then unscrew the
> HDD's
> > enclosure. And attach the top cover back to the camera.
> >
> > Thanks for your recommendations.
> >
> > Best regards,
> > Oleg
> >
>
>
>
> --
> Carlos Padial
> surreal.asturnazari.es
>
> _______________________________________________
> Support-list mailing list
> Support-list at support.elphel.com
> http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://support.elphel.com/pipermail/support-list_support.elphel.com/attachments/20120204/e791e769/attachment-0002.html>