What is the difference between SATA hard disk and other HDD?

[rednewguy]

SATA hard disk

what is the difference between sata hard disk and other hdd. is it faster than other hard drives.

 

[eltonjohn]

Re: SATA hard disk

Well the specs are now at > 3Gigabits/s this is like >400 Mbytes/s .no question they are faster than old IDEs or SCSI III

 

[Jack// ani]

SATA hard disk

Serial Advance Technology Attachment offers a high as eltonjohn already said, and also there cables are very handy!!

 

[echo47]

SATA hard disk

SATA drives may be able to burst a block of data faster than an equivalent model IDE drive, but their seek time and sustained transfer rate will be about the same speed as IDE.

 

[zainka]

Re: SATA hard disk

SATA stands for Serial ATA and it is faster than the old ATA (Parallell interface). You can read more aboute SATA at www.serialata.org .

Comment: Note that (Parallell)ATA and IDE has a lot in common, actual, its almost the same thing. ATA was the orriginal name and it was developed for IBM AT machines and ATA stands for "AT attachment" but it was soon addapted by others and incorporated into the "Integrated Drive Electronics (IDE)" standard, but both terms are used as far as i know.

 

[yaseen1]

Re: SATA hard disk

SATA Is 8-pin interface .
It is faster than paralle.l ATA
Inparallel ATA Speed is limit to only 133Mhz
in Seial ATA Speed we can go upto 300 Mhz ,600 Mhz

 

[farshidjh]

Re: SATA hard disk

How about interfacing a SATA to a sample MCU ?
Could we implement the interface such a way that a low speed MCU can handle it ?

Farshid

 

[zainka]

Re: SATA hard disk

There are no "low speed" limit for the bus clk so Yes, it could be done if u need huge ammount of storage in a mcu project and have some months to spende digging for the datasheet explaining the protocoll and hw. This is not yet common available since the standard is pretty new and the developers wanna get paid by the user of SATA for their research.

Here is, however a topic discussing the same thing using an AVR processor (which have been successfully implemented with the PATA interface earlier) http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=35672&highlight=sata+seriell+ata

Also take a look at this page which is more informative and prehaps gives you wath needed for a start of investigation. It also gives an glimp of the protocoll.,
http://www.interfacebus.com/Design_Connector_Serial_ATA.html

Best tip is to use a bridge IC converting PATA to SATA. Then you can benefit of having the option to select which disk inteface to use AND! there is lot of resources arround the web for intefacing PATA to low cost MCU

Best regards
Vidar (Z)

EDITED 11.49
Youst remembered some sites with some recourses on SATA
**broken link removed**
http://www.dell.com/downloads/global/vectors/2003_sata.pdf
**broken link removed**

 

[farshidjh]

Re: SATA hard disk

There are no "low speed" limit for the bus clk

Glad to hear that.
Using the PATA (Parallel ATA) needs to a lot of pins of the MCU, but the Serial ATA wouldn't need that and this is the inspiration . I hope we wouldn't need more than 512 bytes buffer to use for this protocol.
Currently I use MMCs in my projects , but having an ability to access a mass storage like HDDs would also seems intersting , eg where in MCU you can't do much about compressing and have to capture a lot of data.

Farshid

 

[yaseen1]

Re: SATA hard disk

SATA is very high speed

 

[ehsanelahimirza]

Re: SATA hard disk

hi

sata was made bcz when engineers thought that all the processing is done in series
by processor so why to convert data from a normal hdd from parallel to series then process it

sata gives this processing without any kind of conversion so thats why its fast

 

[zainka]

Re: SATA hard disk

SATA is very high speed

Yes, SATA is very high speed, but it is not limited to BE highspeed. If you can live with the lower clkspeed there should be no reason for SATA devices not to be working with lower clk speed. If you can find the complete protocol description, please inform me

Best regards
Vidar (Z)

 

[ehsanelahimirza]

Re: SATA hard disk

yes
but high speeds r only possible when working in high bus speed