On Sun, Nov 28, 1999 at 03:14:15AM +0000, Darren Nickerson wrote:
>
...
>
> It appears to me that of four identical Maxtor 27GB drives, two will do 66 and
> two will only do 33:
I've seen others report this as well. But I don't know IDE stuff (I just use it
and smile when it works ;)
ATA66 is going to buy you between 0 and 1% performance over ATA33 with any
current disks. Don't wory, be happy.
...
>
> Even more disappointingly, a raid1 array of hde and hdg shows identical
> performance to a raid1 array of hdi and hdk.
As stated above, ATA33 and -66 doesn't make a difference with disks that
couldn't saturate an ATA20 if that one existed.
How ``bad'' is the performance ?
> After about 30 hours of work on the Promise setup, I can conclude that raid
> works fine, but the Ultra66 driver (or my Maxtor disks implementation of
> Ata-66) is just not ready for prime-time. It was just never any faster than my
> onboard (33MHz) ide.
What did you expect ? You drive can transfer something like 15MB/s (give and
take). Putting it on a bus that can do 66MB/s isn't going to make your drive
spin faster.
Some marketing guys did one hell of a job, promoting ATA66. There's a lot
of people out there, believing that it makes a difference...
Oh well, in three years any decent IDE drive will do 50 MB/s from the platter,
and all those ATA66 cards will come in handy. :)
Cheers,
--
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