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Question About Serial Ata-150 & Serial Ata-300


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#1 easycigarman39

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Posted 19 December 2005 - 01:33 AM

I understand that Serial ATA is here and replacing IDE data transfer. I also recently discovered that there are two different types of Serial ATA, 150 and 300. I understand that SATA 300 is greater data transfer than SATA 150. My question, however, is this: Are the physical connection interfaces the same between SATA 150 and SATA 300 or are they different? Are we talking about two different physical connection interfaces between these two? If so, then I would assume that in order to hook up a SATA 300 hard drive to a mainboard geared for SATA 150 I would need some sort of controller card or something--in the same way that IDE-to-Serial needs a controller card. If they're different, my guess is that motherboards will eventually have both interface connections available--leaving out the floppy and IDE interface connections.

The reason I ask is that I'm wanting to put togther a SATA-based, low-end 64-bit computer at some point in time, but may opt to waite until SATA 300 becomes more the norm. I would like to avoid the use of a controller card. I know that computer technology is always improving and changing and whenever I build this system, a few months or so later it will be technically outclassed I'm sure by some newer technology or something. That I accept, but I'd still like to have an understanding on the SATA 150/300 interface difference, if there is one, so as to avoid the need for a controller card at the time the unit is built.

I've asked some store clerks in computer departments these questions but none of them had an answer.

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#2 Mr Alpha

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Posted 19 December 2005 - 07:20 AM

SATA 150 and SATA 300 (aka SATA II) are compatible. You can mix and match however you want.
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#3 welco

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Posted 19 December 2005 - 06:32 PM

SATA or serial ATA seems to be the direction hard drives are going these days so it is a wise decision to make the switch. As for differences between the two there aren't too many. Aside from NCQ, native command queuing, which allows the hard drive to determine the easiest way for it to execute the commands given this isn't fully utilized yet, you aren't going to notice a huge difference. This is becaue the hard drive spindle can only handle say 50 mb/s this can't change no matter the transfer rate. Not to say SATA is useless, there is lots of stuff it can do that IDE can't. One example is NCQ they also can't run fifteen drives off of one IDE controller and they consume alot more power than a SATA drive.

Edited by welco, 19 December 2005 - 06:35 PM.

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