PCIe seems slow

Hi all,
I just upgraded my scsi card to a PCIe u320 scsi card (LSI0008). I
have dual 15k drives in Raid 0 and my speeds are still at 170 mb/sec
(per HD tach). Shouldn't they be higher? Is there anything that I
can tweak to get better performance?
Thanks
P

"Pachydermitis" <praesagus@gmail.com> wrote in message
news:1193254788.349615.167690@k35g2000prh.googlegr oups.com...
> Hi all,
> I just upgraded my scsi card to a PCIe u320 scsi card (LSI0008). I
> have dual 15k drives in Raid 0 and my speeds are still at 170 mb/sec
> (per HD tach). Shouldn't they be higher? Is there anything that I
> can tweak to get better performance?
> Thanks
> P
>
Your max transfer speed is limited to rate at which data passes the read
head, changing controller does not change that!

Mike.

Pachydermitis wrote in
news:1193254788.349615.167690@k35g2000prh.googlegr oups.com
> Hi all,
> I just upgraded my scsi card to a PCIe u320 scsi card (LSI0008). I
> have dual 15k drives in Raid 0 and my speeds

> are still at 170 mb/sec (per HD tach).

Still? What, you lied in your earlier post?

> Shouldn't they be higher?

Of course they should, you bought an Ultra320 card, didn't ya.
Obviously you should get 320MB/s, nomatter how slow (oops, fast?)
your drives (that obviously shall remain anonymous) are.

> Is there anything that I can tweak to get better performance?
> Thanks
> P

On Oct 24, 3:12 pm, "Folkert Rienstra" <see_reply...@myweb.nl> wrote:
> Pachydermitis wrote innews:1193254788.349615.167690@k35g2000prh.google groups.com
>
> > Hi all,
> > I just upgraded my scsi card to a PCIe u320 scsi card (LSI0008). I
> > have dual 15k drives in Raid 0 and my speeds
> > are still at 170 mb/sec (per HD tach).
>
> Still? What, you lied in your earlier post?
>
> > Shouldn't they be higher?
>
> Of course they should, you bought an Ultra320 card, didn't ya.
> Obviously you should get 320MB/s, nomatter how slow (oops, fast?)
> your drives (that obviously shall remain anonymous) are.
>
>
>
> > Is there anything that I can tweak to get better performance?
> > Thanks
> > P- Hide quoted text -
>
> - Show quoted text -

Hello again Fockert,
Thank you for sharing your knowledge and expertise with the forum.
Your sarcasm, cynicism, and witt always make me smile - you should be
a radio host.
Those anonymous drives are Seagate Cheetahs 73GB 15K U320 3.6ms avg
seek (st373453lc).
This is an HP xw6200 running xp pro with dual 3.4Ghz processors -
800Mhz Bus.
I upgraded from the pci scsi card (my last post) to a pci-e card, but
was hoping for a better increase in performance.
Thanks again
P

Pachydermitis <praesagus@gmail.com> wrote:
> On Oct 24, 3:12 pm, "Folkert Rienstra" <see_reply...@myweb.nl> wrote:
>> Pachydermitis wrote innews:1193254788.349615.167690@k35g2000prh.google groups.com
>>
>> > Hi all,
>> > I just upgraded my scsi card to a PCIe u320 scsi card (LSI0008). I
>> > have dual 15k drives in Raid 0 and my speeds
>> > are still at 170 mb/sec (per HD tach).
>>
>> Still? What, you lied in your earlier post?
>>
>> > Shouldn't they be higher?
>>
>> Of course they should, you bought an Ultra320 card, didn't ya.
>> Obviously you should get 320MB/s, nomatter how slow (oops, fast?)
>> your drives (that obviously shall remain anonymous) are.
>>
>>
>>
>> > Is there anything that I can tweak to get better performance?
>> > Thanks
>> > P- Hide quoted text -
>>
>> - Show quoted text -
>
> Hello again Fockert,
> Thank you for sharing your knowledge and expertise with the forum.
> Your sarcasm, cynicism, and witt always make me smile - you should be
> a radio host.
> Those anonymous drives are Seagate Cheetahs 73GB 15K U320 3.6ms avg
> seek (st373453lc).
> This is an HP xw6200 running xp pro with dual 3.4Ghz processors -
> 800Mhz Bus.
> I upgraded from the pci scsi card (my last post) to a pci-e card, but
> was hoping for a better increase in performance.
> Thanks again
> P
>

the claimed speeds for that disk are

56.1 to 86.0MB/sec

so it sounds like you're getting what you should for striping.

BTW, that's a very old model of disk drive. It's not going to hot-rod a
xw6200.

On Oct 25, 12:53 pm, Cydrome Leader <prese...@MUNGEpanix.com> wrote:
> Pachydermitis <praesa...@gmail.com> wrote:
> > On Oct 24, 3:12 pm, "Folkert Rienstra" <see_reply...@myweb.nl> wrote:
> >> Pachydermitis wrote innews:1193254788.349615.167690@k35g2000prh.google groups.com
>
> >> > Hi all,
> >> > I just upgraded my scsi card to a PCIe u320 scsi card (LSI0008). I
> >> > have dual 15k drives in Raid 0 and my speeds
> >> > are still at 170 mb/sec (per HD tach).
>
> >> Still? What, you lied in your earlier post?
>
> >> > Shouldn't they be higher?
>
> >> Of course they should, you bought an Ultra320 card, didn't ya.
> >> Obviously you should get 320MB/s, nomatter how slow (oops, fast?)
> >> your drives (that obviously shall remain anonymous) are.
>
> >> > Is there anything that I can tweak to get better performance?
> >> > Thanks
> >> > P- Hide quoted text -
>
> >> - Show quoted text -
>
> > Hello again Fockert,
> > Thank you for sharing your knowledge and expertise with the forum.
> > Your sarcasm, cynicism, and witt always make me smile - you should be
> > a radio host.
> > Those anonymous drives are Seagate Cheetahs 73GB 15K U320 3.6ms avg
> > seek (st373453lc).
> > This is an HP xw6200 running xp pro with dual 3.4Ghz processors -
> > 800Mhz Bus.
> > I upgraded from the pci scsi card (my last post) to a pci-e card, but
> > was hoping for a better increase in performance.
> > Thanks again
> > P
>
> the claimed speeds for that disk are
>
> 56.1 to 86.0MB/sec
>
> so it sounds like you're getting what you should for striping.
>
> BTW, that's a very old model of disk drive. It's not going to hot-rod a
> xw6200.- Hide quoted text -
>
> - Show quoted text -

Thank you, I guess I need to look at some newer drives to get my
money's worth out of this card.

Pachydermitis wrote:
<snip>
> Thank you, I guess I need to look at some newer drives to get my
> money's worth out of this card.

Just curious about your 'handle'; perchance do you intend it to
be a "Wheel of Fortune" style combination of 'Pachyderm' and
'dermatitis' in which case it should read 'Pachydermatitis'?

Regards,

Michael

Pachydermitis wrote in
news:1193338313.248484.168060@t8g2000prg.googlegro ups.com
> On Oct 24, 3:12 pm, "Folkert Rienstra" <see_reply...@myweb.nl> wrote:
> > Pachydermitis wrote
> > innews:1193254788.349615.167690@k35g2000prh.google groups.com
> >
> > > Hi all,
> > > I just upgraded my scsi card to a PCIe u320 scsi card (LSI0008). I
> > > have dual 15k drives in Raid 0 and my speeds
> > > are still at 170 mb/sec (per HD tach).
> >
> > Still? What, you lied in your earlier post?
> >
> > > Shouldn't they be higher?
> >
> > Of course they should, you bought an Ultra320 card, didn't ya.
> > Obviously you should get 320MB/s, nomatter how slow (oops, fast?)
> > your drives (that obviously shall remain anonymous) are.
> >
> >
> >
> > > Is there anything that I can tweak to get better performance?
> > > Thanks
> > > P- Hide quoted text -
> >
> > - Show quoted text -

> Hello again Fockert,

Nice one.

> Thank you for sharing your knowledge and expertise with the forum.
> Your sarcasm, cynicism, and witt always make me smile - you should be
> a radio host.

> Those anonymous drives are Seagate Cheetahs 73GB 15K U320 3.6ms avg
> seek (st373453lc).

*9* words used to describe it and only one that actually identifies it.
You sure you didn't make a mistake.

> This is an HP xw6200 running xp pro with dual 3.4Ghz processors -
> 800Mhz Bus.

And what has that got to do with the drives.

> I upgraded from the pci scsi card (my last post) to a pci-e card,

Yes, obviously. And money to burn.

> but was hoping for a better increase in performance.

On what grounds. God speaks to you in your sleep?

> Thanks again
> P

msg wrote in news:13i25rrdprcd483@corp.supernews.com
> Pachydermitis wrote:
> <snip>
> > Thank you, I guess I need to look at some newer drives to get my
> > money's worth out of this card.
>
> Just curious about your 'handle'; perchance do you intend it to
> be a "Wheel of Fortune" style combination of 'Pachyderm' and
> 'dermatitis' in which case it should read 'Pachydermatitis'?

Does a troll need a reason? What's yours.

>
> Regards,
>
> Michael

Cydrome Leader wrote in news:ffqs8f$odb$1@reader1.panix.com
> Pachydermitis <praesagus@gmail.com> wrote:
> > On Oct 24, 3:12 pm, "Folkert Rienstra" <see_reply...@myweb.nl> wrote:
> > > Pachydermitis wrote
> > > innews:1193254788.349615.167690@k35g2000prh.google groups.com
> > >
> > > > Hi all,
> > > > I just upgraded my scsi card to a PCIe u320 scsi card (LSI0008). I
> > > > have dual 15k drives in Raid 0 and my speeds
> > > > are still at 170 mb/sec (per HD tach).
> > >
> > > Still? What, you lied in your earlier post?
> > >
> > > > Shouldn't they be higher?
> > >
> > > Of course they should, you bought an Ultra320 card, didn't ya.
> > > Obviously you should get 320MB/s, nomatter how slow (oops, fast?)
> > > your drives (that obviously shall remain anonymous) are.
> > >
> > >
> > >
> > > > Is there anything that I can tweak to get better performance?
> > > > Thanks
> > > > P- Hide quoted text -
> > >
> > > - Show quoted text -
> >
> > Hello again Fockert,
> > Thank you for sharing your knowledge and expertise with the forum.
> > Your sarcasm, cynicism, and witt always make me smile - you should be
> > a radio host.
> > Those anonymous drives are Seagate Cheetahs 73GB 15K U320 3.6ms avg
> > seek (st373453lc).
> > This is an HP xw6200 running xp pro with dual 3.4Ghz processors -
> > 800Mhz Bus.
> > I upgraded from the pci scsi card (my last post) to a pci-e card, but
> > was hoping for a better increase in performance.
> > Thanks again
> > P
> >
>
> the claimed speeds for that disk are

> 56.1 to 86.0MB/sec

51 to 76 MB/s according to StorageReview
48 to 73 MB/s according to c't

> so it sounds like

Right, sounds.

> you're getting what you should for striping.

Actually more, which we all know is impossible.

Like I said before, *what* 170MB/s.

>
> BTW, that's a very old model of disk drive.
> It's not going to hot-rod a xw6200.