Hard Drive data rates

[Karl Larsen]

Dave Stevens wrote:
> On Friday 28 September 2007 03:00:11 pm Karl Larsen wrote:
>   
>> Dave Stevens wrote:
>>     
>>> On Friday 28 September 2007 10:50:32 am Karl Larsen wrote:
>>>       
>>>>     I was lead to mis-understand the data rate of my new SATA hard
>>>> drive. It indicated that the data rate was 3 GB/sec. But 
>
> you have to tell it what drive to check, so #hdparm -iItT /dev/sda for 
> example, if your SATA drive is the first one.
>
> Dave
>   
Yes but I am amazed by the results when hdparm is used right. Here is 
what I got 5 minutes ago:

[root at k5di /]# hdparm -t /dev/sda

/dev/sda:
 Timing buffered disk reads:  164 MB in  3.03 seconds =  54.21 MB/sec
[root at k5di /]# hdparm -t /dev/sdf

/dev/sdf:
 Timing buffered disk reads:  190 MB in  3.02 seconds =  62.96 MB/sec
[root at k5di /]# hdparm -T /dev/sdf

/dev/sdf:
 Timing cached reads:   1004 MB in  2.00 seconds = 501.56 MB/sec
[root at k5di /]# hdparm -T /dev/sda

/dev/sda:
 Timing cached reads:   992 MB in  2.00 seconds = 496.23 MB/sec
[root at k5di /]#

    So it appears that a SATA is just a tiny bit faster than a new IDE.


>   
>> --
>>
>> 	Karl F. Larsen, AKA K5DI
>> 	Linux User
>> 	#450462   http://counter.li.org.
>>     
>
>
>   


-- 

	Karl F. Larsen, AKA K5DI
	Linux User
	#450462   http://counter.li.org.