On Fri, 30 Jul 1999, D. Carlos Knowlton wrote:
> Alright, what's going on guys?!
>
> I called Western Digital technical support to find out what I need to do to
> get my U-ATA/66 drives to transfer anything near 66MB/s, (Mega"bytes", note
> the capital 'B')like all the literature and advertising
It's Byte, so 66 Megabytes/sec is correct.
But that's just the burst rate. If you look at the specs
for the disk drives, you'll see that they can't keep up with that rate.
I figure anything >10MB/s sustained is pretty good for todays drives.
Expect more in the future.
Jan Edler
NEC Research Ins
many people in fact do use capital 'B' and lowercase 'b' to distinguish
between Bytes and bits, but it is not uncommon for either of the reverse
cases to be true as well. in these cases, it is always best not to make
assumptions.
-stephen waters
"D. Carlos Knowlton" wrote:
>
> Alright, what's g
Hi,
WD tech support is wrong. Ultra-ATA/66 is definitely 66 megabytes per second.
Not 66 megabits. There is ABSOLUTELY NO QUESTION about this.
Regards,
Bill Ellis
D. Carlos Knowlton wrote:
> Alright, what's going on guys?!
>
> I called Western Digital technical support to find out what I ne
> I didn't try 4 drives. 19MB/s doesn't sound too impressive for 4
> drives at raid5.
>
> How are you measuring the performance?
> I've found that reading /dev/md0 is quite a bit slower
> than reading a file on a mounted filesystem on /dev/md0.
Well, true, I got 19MB/s when I did a "hdparm -t /
First off, the rating was maximum burst-rate, not sustained. The tech
was wrong, it is Bytes, as in 66 Mega-bytes per second. However, UDMA
drives can not sustain that rate. Calculate the spin rate, surface feet
per minute per track, and bit density per track-inch, and you will find
that rate diff
On Fri, Jul 30, 1999 at 11:57:12PM -0500, D. Carlos Knowlton wrote:
> Alright, what's going on guys?!
>
> I called Western Digital technical support to find out what I need to do to
> get my U-ATA/66 drives to transfer anything near 66MB/s, (Mega"bytes", note
> the capital 'B')like all the litera
