On Wed, 24 Jan 2001, Tom Sightler wrote:
> I temporarily disabled that code and the
> increase in IO's per second is measurable, though not earth shattering, but
> I was afraid to leave it that way because fast corrupted data is worth much
> less that only slightly slower good data.
I don't beli
ailto:[EMAIL PROTECTED]]
Sent: Wednesday, January 24, 2001 3:08 PM
To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: Re: No SCSI Ultra 160 with Adaptec Controller
> Actually, aren't a number of newer drives getting upwards of 30MB/s?
>
Well, at 80MB/sec these dr
> Actually, aren't a number of newer drives getting upwards of 30MB/s?
>
Well, at 80MB/sec these drives are able to come in at an average of about
34MB/s across the board.
> > Therefore, you only exceed the 80MB/sec bus speed if you
> > have more than 4 disks all doing maximum I/O at the same ti
Well, this is all what comes from not spending money on this stuff myself- I
guess I just have too many 3 year old drives...
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On Tue, 23 Jan 2001, Matthew Jacob wrote:
> Actually, aren't a number of newer drives getting upwards of 30MB/s?
It depends tests I've done here, with scsi/160 and FC on seagate
drives, the read/write speeds start at ~35MB/s, and peter off to ~22MB/s.
I admit my methodology was crude, but
> /dev/sda:
> Timing buffered disk reads: 64 MB in 1.59 seconds =40.25 MB/sec
>
> They can do more like 40MB/s, so only two disks could saturate the 80MB/s.
Apparently I was misinformed as to the speed of these disks. My
apologies for the confusion this caused.
-Matt
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[EMAIL PROTECTED] wrote:
>
> > Justin's 6.0.9beta(latest release) hasn't corrected the problem yet.
> >
> > scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.0.9 BETA
> >
> > aic7892: Wide Channel A, SCSI Id=7, 32/255 SCBs
> >
> > Vendor: QUANTUM Model: ATLAS10K2-TY
On Tue, 23 Jan 2001, Tim Sullivan wrote:
> [EMAIL PROTECTED] wrote:
> >
> > Yes, that code is still necessary. There's a new aic7xxx driver by Justin
> > Gibbs at Adaptec which is now being beta tested which corrects this issue.
>
> Justin's 6.0.9beta(latest release) hasn't corrected the probl
[EMAIL PROTECTED] wrote:
> Something to note, however: the media transfer rate for those disks is at
> most ~20MB/sec.
Hmm...
scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI)
5.1.31/3.2.4
Vendor: QUANTUM Model: ATLAS10K2-TY092L Rev: DA40
Type: D
[EMAIL PROTECTED] wrote:
>
> Yes, that code is still necessary. There's a new aic7xxx driver by Justin
> Gibbs at Adaptec which is now being beta tested which corrects this issue.
Justin's 6.0.9beta(latest release) hasn't corrected the problem yet.
scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA
On Tue, 23 Jan 2001 [EMAIL PROTECTED] wrote:
> Hi Tom. Thanks for writing.
>
> > Since this machine has Quantum drives I guess this is my
> > problem. Does anyone
> > know if this code is still actually necessary? It seems
> > it's been there a
> > while. It's disappointing to not get
Hi Tom. Thanks for writing.
> Since this machine has Quantum drives I guess this is my
> problem. Does anyone
> know if this code is still actually necessary? It seems
> it's been there a
> while. It's disappointing to not get full performance out of
> the hardware you
> have.
Yes, tha
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