Originally Posted by zzffnn
I am not sure how Tarkan's new adapter can work with a 3TB hard drive, unless he uses a large 3.5" SATA adapter along with a large external battery (or external wall wart). With 1.5 TB, a medium sized 2.5" SATA can be used - it is still difficult to get >6 hrs of battery life without external battery/power though.
Tarkan mentioned better power saving and stability than mSATA. So I assume:
1) Tarkan is talking about portable use (battery instead of wall wart);
2) Tarkan knows about BeyondWind's Rockbox patch (BWRB) and that ~500GB mSATA SSD can run stably for >8 hrs under BWRB?
I could not image how Tarkan can portably run a 1.5TB SATA drive for more than 8 hrs. I would love to believe that though - I would be one of the first to jump onto it if it works!
Tarkan was using wall wart and stock Apply firmware (he said he would try Rockbox but have not) with his 1TB iPod:
I invited Tarkan to join the discussion, someone like him would be very beneficial to our community.
Here's Tarkan's answers:
Answered as numbered :-
1) I am not really doing any testing with RockBox, but with the original firmware I am getting good battery life. My testing has been focused on the 6g/7g at the moment so I only have data for them - with the 850mAh battery I am getting 30Hours of music playback with a 480Gb mSata drive.
2) The Generic mSata boards are total rubbish - to list a few of these issues :- the IDE interface is not ATAPI spec, the circuit layout introduces too much slew between the signals, the mSata interface suffers from too much jitter, the crystal clock has very high jitter, the digital & analog & Sata power supplies are not isolated from one another. This all results in a lot of CRC error checking on the Sata interface and retry errors on the IDE side, UDMA transfer delays and pauses.
I never tested the generic mSata boards in the iPod so cannot say if it is these adapters which are causing problems with the 1Tb, however during my development work using my own board I had no issues with the 5g/5.5g and 1Tb drives, however I do think it is not a comfortable mix - the 6g/7g make a better combination - for various reason.
3) Sata is Sata, my board will work with any Sata based drive - the prototypes will be mSata, but you will also be able to use SATA (3.5" & 2.5") drives using an external supply for the drive. Would be a great customisation project for someone to make an elegant housing to hold the iPod and a 3Tb drive!!
Edited by cmarti - 4/28/14 at 6:03am