> From: Alan Roberts <[EMAIL PROTECTED]> > Subject: Re: [PCI] Adaptec 2940UW > > Sounds a little slow, but not that far off, especially if it's a > 7200RPM drive. Also keep in mind since you're copying between > partitions on the same drive, the 5MB/s you figured is actually closer > to 10MB/s (5MB/s read + 5MB/s write). Copying between a similar or > faster drive would boost the speed I'm sure. > > I have a 4th generation Seagate Cheetah(10,000RPM) that I rarely got > 20MB/s out of. Older drives also have a smaller cache built into them, > so that could slow things down. It is also possible the cable and/or > the 80pin to 68pin adapter is slowing things down some(unlike 68pin to > 50pin, the 80pin has extra power lines and such to terminate and has > been known to cause issues in some cases). > > The jumper configuration may be at fault too. Does the drive have a set > of jumper pins on the back *and* a set on the front? I temporarily > hosed the performance on a drive once when I put the configuration > jumpers on the set intended for SE(single-ended) use, instead of the > LVD set. What's the model number for the drive? Can look up the specs > and see what you should be getting out of it. > > The 2940U2B itself shouldn't be causing problems. I've gotten some nice > performance out of it in the past. > > - Alan
Hi Alan, it is an IBM Type DGHS Comp IEC-950 12 Feb 98. 18G SCSI. And there are pins for the adaptor at the back and a set for the front. I have termination and autospin jumpered on the front and nothing on the back. It defaults to ID 0. True, the cable itself has active termination but when I tried with no termination jumper on the HD front, it was not happy... David Elmo -- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[email protected]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/pci-powermacs%40mail.maclaunch.com/> iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
