>From: [EMAIL PROTECTED] >Message-ID: <[EMAIL PROTECTED]> >Date: Mon, 13 Jan 2003 19:45:50 EST >Subject: Re: UL2D in S900 or x500? > >In a message dated 1/13/03 Jeff Walther <[EMAIL PROTECTED]> writes: > ><< . . . .Do you have evidence that you are operating in LVD mode? Have >you benchmarked your drives and seen peak reads or writes above 40 MB/s?
>According to ExpressPro-Tools the peak reads are in the 49-50 MB/s. Yep, pretty much needed to be in LVD mode for that to happen. > The peak >writes are around the 20 MB/s range. Sustained reads are 12-17 MB/s and >sustained writes are 15-18 MB/s. These drive are not set up in any kind of >RAID. The sample size was set to 2 MB, System Disk Cache box was not checked, >and Max Transfer Size was set to 512k and 2 MB. The 2MB setting seemed to >score a little higher. These WDE18300 have a big dip in transfer rate at the 512K mark. At transfer size 512K I get anti-peak rates down around 11 MB/s. With the size at 8 MB, the average goes up to 18 or 19 MB/s, which is where it seems to plateau. >I'm using a 68 pin ribbon cable with "Amphenol Spectra Strip" printed on it. >There is a twisted section with salmon/white colored wiring. Termination is >with a 68 pin block terminated plugged into the end the ribbon cable. Thank you, Glen. That is just what I needed to know. I'd guess that the UL2D should work in LVD mode in my machine and now it is down to incompatibility with the G4/800, a cable/terminator problem (though same brand, mine could be bad), or an issue with SoftRAID. I will conduct more tests. >The cable and terminator were purchased at MC Price Breakers ><http://www.mcpb.com> I'll check them out. It looks like I may be in the market for another cable and/or terminator. Thanks again, Jeff -- 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/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
