D. Hugh Redelmeier wrote:
| From: Gregory Gulik <[EMAIL PROTECTED]>
|
| I have a Sony Vaio laptop which I bought in January with a SATA hard
| drive. Let me tell you, it makes a HUGE difference. Although the clock
| speed of the Vaio is only slightly faster than my R3000Z the performance
| is WAY better overall. It's especially noticeable when opening large
| applications and/or files and any time the laptop needs to swap.
As I said, I don't expect that the difference is in the use of the
SATA aspect of the drive. It may well be other aspects of the drive
that matter.
I assume that the PATA drive is running in some Ultra DMA mode. Using
PIO has serious performance impacts. This could happen if, for
example, the kernel blacklists the controller. This might be worth
checking.
Yes, this laptop has a PATA hard drive and hdparm shows the following:
# hdparm /dev/hda
/dev/hda:
multcount = 16 (on)
IO_support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
geometry = 16383/255/63, sectors = 117210240, start = 0
A simple performance test:
# hdparm -T /dev/hda
/dev/hda:
Timing cached reads: 1868 MB in 2.00 seconds = 934.87 MB/sec
I don't know how useful this timing test is because my Sony with a SATA
hard drive tested about the same.
--
Greg Gulik http://www.gulik.org/greg/
greg @ gulik.org
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