2006-08-14 15:32:50 · 5 answers · asked by sze yun 1 in Computers & Internet ➔ Hardware ➔ Other - Hardware
Speed per second: 150Mb vs 3.0Gb (1024 Mb= 1 Gb) (all notes are in bits not bytes)
2006-08-14 15:36:21 · answer #1 · answered by shmifty__14 5 · 0⤊ 0⤋
I disagree. SATA is not 3-4 times faster than IDE. That's completely false. In fact, the fastest IDE interface was developed by Maxtor and is rated at 133MB/s. The original SATA specification is 150MB/s (only a 13% increase over IDE).
However, it is wrong to look at MB/s meaning speed. Not quite. Most hard drives average only 40-45MB/s transfer rates, because mechanically, there's only so much they can do. A lot of it depends on how data is spread out on the drive. As you can see, 45MB/s can be easily covered by IDE or SATA. That's why you see many drives released for either interface.
2nd generation of SATA (also called SATA II or SATA 2.0) have extra features like Native Command Queuing (NCQ) which can significantly decrease disk access time. In some cases, you could see as much as a 15-20% increase in overall performance over a standard SATA or IDE hard drive.
It is important to also realize that 2nd generation SATA (SATA II) is NOT necessarily the same thing as SATA 3.0 Gb/s. The "3.0 Gb/s" rating is just a "feature" that is sometimes considered to be "a part of" SATA II.
Don't be fooled by the 3.0 speed rating either. It is talking about the bandwidth being wider on the channel to allow more traffic through at once. It's not really talking about the speed of data being transferred. Think of a single hard drive as a single car travelling down a 2-lane highway. SATA 3.0 Gb/s is like widening it to 4 lanes, but keeping the speed limit the same. To one car, that's not going to make a difference -- to many, it will. You start to see the benefit when you have many drives in large arrays (RAID) sharing that bandwidth.
2006-08-15 00:11:01 · answer #2 · answered by SirCharles 6 · 0⤊ 0⤋
The first two kats pretty much hit it for you. SATA vs. SATA 2. SATA is older technology but it is much better than IDE, EIDE, UIDE because it is at least 3-4 times faster, if your other hardware components support that. And the newest out, as of now is SATA 2 which is twice as fast as is previous. SATA is 1.5GB technology and SATA 2 is 3.0GB technology.
2006-08-14 23:03:20 · answer #3 · answered by John A 3 · 0⤊ 0⤋
i bleive SATA is more older than SATA II
2006-08-14 22:36:20 · answer #4 · answered by compy_500 3 · 0⤊ 0⤋
Read the attached link. It might make more sense.
2006-08-14 22:39:10 · answer #5 · answered by Michael M 6 · 0⤊ 0⤋