Hi all,
Thanks in advance for your help. I have an lsi20320-r ultra 320 card
and two maxtor 73gb 15k drives in raid 0. It is slow, 97MB/s (tested
using hd tach). The card is a server card with the long pci bus
(don't know what that is called), but it has the slots to fit in a
regular pci slot too. I have it in a regular pci slot. I am running
an xp box. The Drivers say "LSI Logic 1020/1030 ultra320" I
installed the 20320 drivers, but that is what they show up as. I
changed, cables, pci slots, and even cards (I also have an adaptec
29320 but it is slower) but can't get the speeds I should be seeing
with u320 and 15 raided drives. I have 2 160gb 72k sata drvies raided
and get 170MB/s from them.
Are these just old cards that need to be replaced, or am I overlooking
the obvious. I searched through the archives and tried all the tips I
could find.
Thanks
P
On Mon, 24 Sep 2007 08:27:29 -0700, Pachydermitis <praesagus@gmail.com> wrote:
>Hi all,
>Thanks in advance for your help. I have an lsi20320-r ultra 320 card
>and two maxtor 73gb 15k drives in raid 0. It is slow, 97MB/s (tested
>using hd tach). The card is a server card with the long pci bus
>(don't know what that is called), but it has the slots to fit in a
>regular pci slot too. I have it in a regular pci slot. I am running
>an xp box. The Drivers say "LSI Logic 1020/1030 ultra320" I
>installed the 20320 drivers, but that is what they show up as. I
>changed, cables, pci slots, and even cards (I also have an adaptec
>29320 but it is slower) but can't get the speeds I should be seeing
>with u320 and 15 raided drives. I have 2 160gb 72k sata drvies raided
>and get 170MB/s from them.
>
>Are these just old cards that need to be replaced, or am I overlooking
>the obvious. I searched through the archives and tried all the tips I
>could find.
>Thanks
>P
You are overlooking the obvious: the PCI bus is bandwidth limiting your
end-to-end throughput. A standard PCI bus (33b/33mhz) has a peak throughput of
133MB/sec - which is only attainable in a perfect world where the north bridge
has totally unfettered access to memory, there is never a bus retry, and
arbitration is totally hidden by data phases.
In other words: the roughly 100MB/sec you are seeing is the best it can be.
On Mon, 24 Sep 2007 11:42:08 -0400, daytripper <day_trippr@REMOVEyahoo.com>
wrote:
>On Mon, 24 Sep 2007 08:27:29 -0700, Pachydermitis <praesagus@gmail.com> wrote:
>
>>Hi all,
>>Thanks in advance for your help. I have an lsi20320-r ultra 320 card
>>and two maxtor 73gb 15k drives in raid 0. It is slow, 97MB/s (tested
>>using hd tach). The card is a server card with the long pci bus
>>(don't know what that is called), but it has the slots to fit in a
>>regular pci slot too. I have it in a regular pci slot. I am running
>>an xp box. The Drivers say "LSI Logic 1020/1030 ultra320" I
>>installed the 20320 drivers, but that is what they show up as. I
>>changed, cables, pci slots, and even cards (I also have an adaptec
>>29320 but it is slower) but can't get the speeds I should be seeing
>>with u320 and 15 raided drives. I have 2 160gb 72k sata drvies raided
>>and get 170MB/s from them.
>>
>>Are these just old cards that need to be replaced, or am I overlooking
>>the obvious. I searched through the archives and tried all the tips I
>>could find.
>>Thanks
>>P
>
>You are overlooking the obvious: the PCI bus is bandwidth limiting your
>end-to-end throughput. A standard PCI bus (33b/33mhz) has a peak throughput of
>133MB/sec - which is only attainable in a perfect world where the north bridge
>has totally unfettered access to memory, there is never a bus retry, and
>arbitration is totally hidden by data phases.
>
>In other words: the roughly 100MB/sec you are seeing is the best it can be.
>
>You're gonna need a bigger bus....
>
>/daytripper
Cripes - I think I had a sticky 3 key ;-)
How about: 32bit bus/33mhz => 120MB/sec, best case...
"daytripper" <day_trippr@REMOVEyahoo.com> wrote in message
news:gomff3tqjhm9i7s72gq6o18mc973t7mlpa@4ax.com...
> On Mon, 24 Sep 2007 11:42:08 -0400, daytripper
> <day_trippr@REMOVEyahoo.com>
> wrote:
>
>>On Mon, 24 Sep 2007 08:27:29 -0700, Pachydermitis <praesagus@gmail.com>
>>wrote:
>>
>>>Hi all,
>>>Thanks in advance for your help. I have an lsi20320-r ultra 320 card
>>>and two maxtor 73gb 15k drives in raid 0. It is slow, 97MB/s (tested
>>>using hd tach). The card is a server card with the long pci bus
>>>(don't know what that is called), but it has the slots to fit in a
>>>regular pci slot too. I have it in a regular pci slot. I am running
>>>an xp box. The Drivers say "LSI Logic 1020/1030 ultra320" I
>>>installed the 20320 drivers, but that is what they show up as. I
>>>changed, cables, pci slots, and even cards (I also have an adaptec
>>>29320 but it is slower) but can't get the speeds I should be seeing
>>>with u320 and 15 raided drives. I have 2 160gb 72k sata drvies raided
>>>and get 170MB/s from them.
>>>
>>>Are these just old cards that need to be replaced, or am I overlooking
>>>the obvious. I searched through the archives and tried all the tips I
>>>could find.
>>>Thanks
>>>P
>>
>>You are overlooking the obvious: the PCI bus is bandwidth limiting your
>>end-to-end throughput. A standard PCI bus (33b/33mhz) has a peak
>>throughput of
>>133MB/sec - which is only attainable in a perfect world where the north
>>bridge
>>has totally unfettered access to memory, there is never a bus retry, and
>>arbitration is totally hidden by data phases.
>>
>>In other words: the roughly 100MB/sec you are seeing is the best it can
>>be.
>>
>>You're gonna need a bigger bus....
>>
>>/daytripper
>
> Cripes - I think I had a sticky 3 key ;-)
> How about: 32bit bus/33mhz => 120MB/sec, best case...
>
> /daytripper (rebooting...)
>
Sorry, 32bit bus gives 4bytes per clock @ 33MHz = 132 Mbytes/sec max
THEORETICAL!, slower in practise. You would need a server grade board with
64bit bus or 66MHz clock, or both :-)
Pachydermitis <praesagus@gmail.com> wrote:
> Hi all,
> Thanks in advance for your help. I have an lsi20320-r ultra 320 card
> and two maxtor 73gb 15k drives in raid 0. It is slow, 97MB/s (tested
> using hd tach). The card is a server card with the long pci bus
> (don't know what that is called), but it has the slots to fit in a
> regular pci slot too. I have it in a regular pci slot. I am running
> an xp box. The Drivers say "LSI Logic 1020/1030 ultra320" I
> installed the 20320 drivers, but that is what they show up as. I
> changed, cables, pci slots, and even cards (I also have an adaptec
> 29320 but it is slower) but can't get the speeds I should be seeing
> with u320 and 15 raided drives. I have 2 160gb 72k sata drvies raided
> and get 170MB/s from them.
>
> Are these just old cards that need to be replaced, or am I overlooking
> the obvious. I searched through the archives and tried all the tips I
> could find.
> Thanks
> P
>
>
>"daytripper" <day_trippr@REMOVEyahoo.com> wrote in message
>news:gomff3tqjhm9i7s72gq6o18mc973t7mlpa@4ax.com.. .
>> On Mon, 24 Sep 2007 11:42:08 -0400, daytripper
>> <day_trippr@REMOVEyahoo.com>
>> wrote:
>>
>>>On Mon, 24 Sep 2007 08:27:29 -0700, Pachydermitis <praesagus@gmail.com>
>>>wrote:
>>>
>>>>Hi all,
>>>>Thanks in advance for your help. I have an lsi20320-r ultra 320 card
>>>>and two maxtor 73gb 15k drives in raid 0. It is slow, 97MB/s (tested
>>>>using hd tach). The card is a server card with the long pci bus
>>>>(don't know what that is called), but it has the slots to fit in a
>>>>regular pci slot too. I have it in a regular pci slot. I am running
>>>>an xp box. The Drivers say "LSI Logic 1020/1030 ultra320" I
>>>>installed the 20320 drivers, but that is what they show up as. I
>>>>changed, cables, pci slots, and even cards (I also have an adaptec
>>>>29320 but it is slower) but can't get the speeds I should be seeing
>>>>with u320 and 15 raided drives. I have 2 160gb 72k sata drvies raided
>>>>and get 170MB/s from them.
>>>>
>>>>Are these just old cards that need to be replaced, or am I overlooking
>>>>the obvious. I searched through the archives and tried all the tips I
>>>>could find.
>>>>Thanks
>>>>P
>>>
>>>You are overlooking the obvious: the PCI bus is bandwidth limiting your
>>>end-to-end throughput. A standard PCI bus (33b/33mhz) has a peak
>>>throughput of
>>>133MB/sec - which is only attainable in a perfect world where the north
>>>bridge
>>>has totally unfettered access to memory, there is never a bus retry, and
>>>arbitration is totally hidden by data phases.
>>>
>>>In other words: the roughly 100MB/sec you are seeing is the best it can
>>>be.
>>>
>>>You're gonna need a bigger bus....
>>>
>>>/daytripper
>>
>> Cripes - I think I had a sticky 3 key ;-)
>> How about: 32bit bus/33mhz => 120MB/sec, best case...
>>
>> /daytripper (rebooting...)
>>
> Sorry, 32bit bus gives 4bytes per clock @ 33MHz = 132 Mbytes/sec max
Doh! I knew it was a bad day to get out of bed.
/daytripper (challenged by pretty much everything today)
Michael Hawes wrote in news:46f80717$1_2@mk-nntp-2.news.uk.tiscali.com
> "daytripper" <day_trippr@REMOVEyahoo.com> wrote in message news:gomff3tqjhm9i7s72gq6o18mc973t7mlpa@4ax.com...
> > On Mon, 24 Sep 2007 11:42:08 -0400, daytripper day_trippr@REMOVEyahoo.com wrote:
> > > On Mon, 24 Sep 2007 08:27:29 -0700, Pachydermitis praesagus@gmail.com wrote:
> > >
> > > > Hi all,
> > > > Thanks in advance for your help. I have an lsi20320-r ultra 320 card
> > > > and two maxtor 73gb 15k drives in raid 0. It is slow, 97MB/s (tested
> > > > using hd tach). The card is a server card with the long pci bus
> > > > (don't know what that is called), but it has the slots to fit in a
> > > > regular pci slot too. I have it in a regular pci slot. I am running
> > > > an xp box. The Drivers say "LSI Logic 1020/1030 ultra320" I
> > > > installed the 20320 drivers, but that is what they show up as. I
> > > > changed, cables, pci slots, and even cards (I also have an adaptec
> > > > 29320 but it is slower) but can't get the speeds I should be seeing
> > > > with u320 and 15 raided drives. I have 2 160gb 72k sata drvies raided
> > > > and get 170MB/s from them.
> > > >
> > > > Are these just old cards that need to be replaced, or am I overlooking
> > > > the obvious. I searched through the archives and tried all the tips I
> > > > could find.
> > > > Thanks
> > > > P
> > >
> > > You are overlooking the obvious: the PCI bus is bandwidth limiting your
> > > end-to-end throughput. A standard PCI bus (33b/33mhz) has a peak throughput of
> > > 133MB/sec - which is only attainable in a perfect world where the north bridge
> > > has totally unfettered access to memory, there is never a bus retry, and arbitration
> > > is totally hidden by data phases.
> > >
> > > In other words: the roughly 100MB/sec you are seeing is the best it can be.
> > >
> > > You're gonna need a bigger bus....
> > >
> > > /daytripper
> >
> > Cripes - I think I had a sticky 3 key ;-)
> > How about: 32bit bus/33mhz => 120MB/sec, best case...
> >
> > /daytripper (rebooting...)
> >
> Sorry, 32bit bus gives 4bytes per clock @ 33MHz = 132 Mbytes/sec max
Of which not all clocks are data bytes (PCI overhead), of which
data bytes not all data is SCSI user data (SCSI overhead).
> THEORETICAL!,
So nope. It's just the first limit in a number of limits.
> slower in practise.
Because the theory is obviously false.
> You would need a server grade board with 64bit bus or 66MHz clock,
> or both :-)
>
> Mike.
daytripper wrote in news:857gf3pbson5gd2k8op7hufrunaj1rbgf1@4ax.com
> On Mon, 24 Sep 2007 19:36:24 +0100, "Michael Hawes" <michael.hawes1remove@tiscali.co.uk> wrote:
> > "daytripper" day_trippr@REMOVEyahoo.com> wrote in message news:gomff3tqjhm9i7s72gq6o18mc973t7mlpa@4ax.com...
> > > On Mon, 24 Sep 2007 11:42:08 -0400, daytripper day_trippr@REMOVEyahoo.com wrote:
> > > > On Mon, 24 Sep 2007 08:27:29 -0700, Pachydermitis praesagus@gmail.com wrote:
> > > >
> > > > > Hi all,
> > > > > Thanks in advance for your help. I have an lsi20320-r ultra 320 card
> > > > > and two maxtor 73gb 15k drives in raid 0. It is slow, 97MB/s (tested
> > > > > using hd tach). The card is a server card with the long pci bus
> > > > > (don't know what that is called), but it has the slots to fit in a
> > > > > regular pci slot too. I have it in a regular pci slot. I am running
> > > > > an xp box. The Drivers say "LSI Logic 1020/1030 ultra320" I
> > > > > installed the 20320 drivers, but that is what they show up as. I
> > > > > changed, cables, pci slots, and even cards (I also have an adaptec
> > > > > 29320 but it is slower) but can't get the speeds I should be seeing
> > > > > with u320 and 15 raided drives. I have 2 160gb 72k sata drvies raided
> > > > > and get 170MB/s from them.
> > > > >
> > > > > Are these just old cards that need to be replaced, or am I overlooking
> > > > > the obvious. I searched through the archives and tried all the tips I
> > > > > could find.
> > > > > Thanks
> > > > > P
> > > >
> > > > You are overlooking the obvious: the PCI bus is bandwidth limiting your
> > > > end-to-end throughput. A standard PCI bus (33b/33mhz) has a peak throughput of
> > > > 133MB/sec - which is only attainable in a perfect world where the north bridge
> > > > has totally unfettered access to memory, there is never a bus retry, and
> > > > arbitration is totally hidden by data phases.
> > > >
> > > > In other words: the roughly 100MB/sec you are seeing is the best it can be.
> > > >
> > > > You're gonna need a bigger bus....
> > > >
> > > > /daytripper
> > >
> > > Cripes - I think I had a sticky 3 key ;-)
> > > How about: 32bit bus/33mhz => 120MB/sec, best case...
> > >
> > > /daytripper (rebooting...)
> > >
> > Sorry, 32bit bus gives 4bytes per clock @ 33MHz = 132 Mbytes/sec max
> Doh! I knew it was a bad day to get out of bed.
Oh? It's what you basically said. And yes, it is 133, not 132.
But if you can't find that back in your own post and apologize
for nothing to apologize about, yeah, maybe you should have.
As for answering a blatantly obvious troll question ....
>
> /daytripper (challenged by pretty much everything today)
daytripper, you are the best. Thanks for answering my question my
(blatantly obvious troll) question. I appreciate you taking the time
to get me pointed in the right direction.
Folkert, once upon a time someone explained the same things to
you...
Slow u320 
Linear Mode
