I have a question about IDE and SATA interfaces

[hul2000]

The old IDE(ATA) came in several standers. ATA/33 (33 MBps), ATA/66 (66 MBps), ATA/100 (100 MBps) and ATA/133 (133 MBps).
Even though the ATA/133 transfered at a speed of 133 MBps, the Hard Disks never used that full speed. That's because the Heads in the Hard Drive cannot read data from the platters with that much speed. It was a limitation on the Hard Disk mechanism. In fact IDE Hard Disks very rarely transfered above 66MBps. So it would not have made much different if you had a ATA/100 or a ATA/133.
Since then the technology has improved and Hard Disks now use the Serial ATA (SATA) interface. SATA comes in 1.5 Gbits/s, 3 Gbits/s and 6 Gbits/s.
My question is, does SATA Hard Disks use this full speed? OR do they still have the same limitation as the IDE?

 

[randiljosh]

yes i transfer files with ma friends sata hard it was maxed out at 60mb/s but i'm very satisfied with that results coz some ide hards max out at about 20-30mb/s and i think when it comes reading files it's even faster..i hve 2 say that technolgy has improved...i think that da 3gb/s they say is da bandwidth of m.b 2 sata hards

 

[hul2000]

yes i transfer files with ma friends sata hard it was maxed out at 60mb/s but i'm very satisfied with that results coz some ide hards max out at about 20-30mb/s and i think when it comes reading files it's even faster..i hve 2 say that technolgy has improved...i think that da 3gb/s they say is da bandwidth of m.b 2 sata hards

So, even with a SATA 3 Gbits/s (384MBps) interface you only get about 60MBps?

 

[randiljosh]

So, even with a SATA 3 Gbits/s (384MBps) interface you only get about 60MBps?

yeah i think that's enough for now if u really get 3gb/s think what u can do a dvd will copy in less than 1sec that's not going 2 happend

 

[hul2000]

yeah i think that's enough for now if u really get 3gb/s think what u can do a dvd will copy in less than 1sec that's not going 2 happend

So, there is no point of upgrading from SATA 1.5Gbits/s to SATA 3Gbits/s?

 

[randiljosh]

yeah i think so boz i'm also using sata 1.5 gb/s...i think u should also ask some one hveing a sata 3.0gb/s

i did that transfer thing in a 3.0gb/s mother board.

 

[Ranhiru]

yeah i think that's enough for now if u really get 3gb/s think what u can do a dvd will copy in less than 1sec that's not going 2 happend

dat wont happen coz its not a problem with da 3gb/s HDD...but da DVD-ROM!!

 

[randiljosh]

dat wont happen coz its not a problem with da 3gb/s HDD...but da DVD-ROM!!

yeah that 2.....sorry

 

[farshad]

hmm...

 

[Anusha]

Interface speed and the speed reading off the platters are two different things.

Here, 100MBps, 133MBps, 1.5Gbps (= 150MBps), 3Gbps (= 300MBps) are interface speeds.

There are few drives that can touch 100MBps platter speed, and one drive that can reach up to 120MBps (The Samsung Spinpoint F1 series).

PATA or SATA, the hard drive is still the same.

No point having a 4 lane road or 10 lane road if the traffic is so low. Like that, it doesn't make much difference with a faster interface, if data can't be pulled or pushed at that rate.

P.S.
Those Gbps to MBps conversions do not follow the rule of 8bits = 1 byte as there is a 8b/10b encoding process. (in 10bits, there is actually 8 data bits, others are encoding overheads)

 

[Anusha]

hmm...

Owl!

 

[lahirumam]

Interface speed and the speed reading off the platters are two different things.

Here, 100MBps, 133MBps, 1.5Gbps (= 150MBps), 3Gbps (= 300MBps) are interface speeds.

There are few drives that can touch 100MBps platter speed, and one drive that can reach up to 120MBps (The Samsung Spinpoint F1 series).

PATA or SATA, the hard drive is still the same.

No point having a 4 lane road or 10 lane road if the traffic is so low. Like that, it doesn't make much difference with a faster interface, if data can't be pulled or pushed at that rate.

P.S.
Those Gbps to MBps conversions do not follow the rule of 8bits = 1 byte as there is a 8b/10b encoding process. (in 10bits, there is actually 8 data bits, others are encoding overheads)

Nice Work.....

 

[henderson]

I think most influencing factor is market factor, if you buy a new machine prpobably its good idea to go for sata 3Gb/s or 6Gb/s since in 2-3 years hard drives built on other IDE, sata 1.5 may not be available.

 

[zCexVe]

Its like SL highway man.Road is there but vehicles arent upto only few of.And IMHO its going as this.
33 MBps>66MBps>100MBps>133MBps>150MBps>300MBps.The last two are SATA while others are IDE/EIDE/PATA whatever.

 

[Anusha]

I think most influencing factor is market factor, if you buy a new machine prpobably its good idea to go for sata 3Gb/s or 6Gb/s since in 2-3 years hard drives built on other IDE, sata 1.5 may not be available.

What exactly did you mean by 6Gbps?

 

[henderson]

What exactly did you mean by 6Gbps?

sata standered defines 3 standereds, one is 6Gb/s.

http://en.wikipedia.org/wiki/Serial_ATA

 

[dpg]

sata standered defines 3 standereds, one is 6Gb/s.

http://en.wikipedia.org/wiki/Serial_ATA

They r still planning.

"SATA's roadmap includes plans for a 6.0 Gbit/s standard."

 

[sriflipflop]

I think most influencing factor is market factor, if you buy a new machine prpobably its good idea to go for sata 3Gb/s or 6Gb/s since in 2-3 years hard drives built on other IDE, sata 1.5 may not be available.

 

[Anusha]

sata standered defines 3 standereds, one is 6Gb/s.

http://en.wikipedia.org/wiki/Serial_ATA

Like dpg said, it is yet to come. Maybe SATA-III

 

[prasadana2]

normaly the transfer rate is 10times slower than the given speed if they say 3gb per second its 300mbps...