Hard Drive data rates
Karl Larsen
k5di at zianet.com
Fri Sep 28 22:58:47 UTC 2007
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.
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