PC Peripherals Hard Disk Query?

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Udit

Udit

Herald
I'am going to buy a SATA 1 Hard Disk in a few days.

So I want to know:
1) Difference between SATA 1 & SATA 2?
2) Which is the best SATA 1 Hard Disk in a 8k budget?
3) Which is the best SATA 1 Hard Disk in a 5k budget?

Currently I have a Seagate 160GB 7200.7 SATA 1 Hard Disk.

I will buy one now & another same identical Hard Disk next year.
 
SATA II hdds are bacward compatible, and are similarly priced. SATA II if I am not mistaken offers the Native Command queing tech.
 
Aces170 said:
SATA II hdds are bacward compatible, and are similarly priced. SATA II if I am not mistaken offers the Native Command queing tech.
Click to expand...

will SATA II work on a SATA I motherboard?
 
^^ Yes SATA-2 will work on a SATA-1 board :)

I would suggest the Hitachi 250GB SATA-2 retailing at 5.5k. Offers best VFM and performance in that price bracket
 
Aces170 said:
SATA II hdds are bacward compatible, and are similarly priced. SATA II if I am not mistaken offers the Native Command queing tech.
Click to expand...

Even SATA I offers NCQ.
 
For query 1 :

Sata II is 3Gb/s(3000 Mbits/s), Sata I is 1.5Gb/s(1500 Mbits/s)

Reason :

According to the sata specs, the sata encoding is 8b/10b or about 80% efficient encoding so the effective bandwidth or maximum throughput is about 150Mbytes/s for sata I and 300 Mbytes/s for sata II.

OR 150MB/s for sata I and 300 MB/s for sata II

Calculation for the curious :

(1500 * 1 * 80%) / 8 = 150MB/s

where 1500Mhz is the clock, 1 is the bit per clock, 80% is encoding efficiency, 8 is no of bits per byte

_________

udit said:
will SATA II work on a SATA I motherboard?
Click to expand...

Yep, at SATA I speeds.(150MB/s instead of 300 MB/s)
 
dipdude said:
For query 1 :

Sata II is 3Gb/s(3000 Mbits/s), Sata I is 1.5Gb/s(1500 Mbits/s)

Reason :

According to the sata specs, the sata encoding is 8b/10b or about 80% efficient encoding so the effective bandwidth or maximum throughput is about 150Mbytes/s for sata I and 300 Mbytes/s for sata II.

OR 150MB/s for sata I and 300 MB/s for sata II

Calculation for the curious :

(1500 * 1 * 80%) / 8 = 150MB/s

where 1500Mhz is the clock, 1 is the bit per clock, 80% is encoding efficiency, 8 is no of bits per byte

_________

Yep, at SATA I speeds.(150MB/s instead of 300 MB/s)
Click to expand...

thanks a lot dipdude & all others.

so Hitachi 250GB SATAII it is.

Just lemme sell my PS2 now.

OT: This is my 1000th Post.

:yahoo: :jerry: :hap2:
 
^^ Those are just theoritical speeds atleast in the current scenario the speed increment is negligible.
 
Those are theoretical...

SATA 2 has no advantage over SATA.

Even the Fastest SATA Drive in the world, the WD Raptor 150GB 10k RPM, uses SATA1.

The SATA calculations are the theorectical highests speeds achievable.

The 150GB Raptor, gets around 140mBps transfer rates.

Most usual HDD's get 40 - 55mbps.

The 250GB Hitachi gets 50mbps if im not mistaken.
 
Those are just theoritical speeds atleast in the current scenario the speed increment is negligible.
Click to expand...

Well i wouldnt use the term negligible...there is quite a bit performance diff between the SATA disks and the ATA disks...
Previously i was running windows off a 40 gb ATA disk and now i have changed over to a 160gb SATA II and there is a marked improvement in the data transfer speeds and the system performance(its not merely because of a new windows installation)
 
^ The interface doesnt have so much of an impact, in your case it has more to do with architectural improvements, such as increased disk platter density - i.e. if you take a 250GB SATA disk and stack it up against a 160GB SATA disk (both identical disks taken from the same 'series/models' from the same company), the 250gig one will definately show higher speeds even though they're virtually the same.

Similarly there are other evolutionary mechanical improvements in newer disks/newer models. An older 40gig drive when compared to a more 'modern' 40gig drive will again show differences in performance.
 
Well the hdd i have are...

40 gb 7200.7
80gb 7200.7
160gb SATA 7200.7
160gb SATA 7200.9

the 160 SATA 7200.7 seems faster than the 40gb 7200.7 when transfering data to the 160 SATA 7200.9
 
It definately would be disk platter density in that case. The SATA interface may have a marginal influence, but not too much IMO.
 
goldenfrag said:
Those are theoretical...

SATA 2 has no advantage over SATA.
Even the Fastest SATA Drive in the world, the WD Raptor 150GB 10k RPM, uses SATA1.

The SATA calculations are the theorectical highests speeds achievable.
The 150GB Raptor, gets around 140mBps transfer rates.
Most usual HDD's get 40 - 55mbps.
The 250GB Hitachi gets 50mbps if im not mistaken.
Click to expand...

Again Gf check before u post. Dont post if u dont know. The Raptor gets 150 mBps and usual HDD's get 40-44 mbps :rofl: The raptor does not go beyond 80 MB/s iirc.
 
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