> From: [EMAIL PROTECTED] > In a messageDavid Elmo <[EMAIL PROTECTED]> writes: > > << >> If you are going for full LVD performance you will need a SCSI card and >> ribbon cable that supports LVD without adapters. > > Without adaptors? My Seagate has an 80 pin connection and nothing else, so > it has to have some adaptor to get the 4 pin power surely? The LVD compliant > cards I have looked out for have 68 pin connectors. (True, I am running it > at the moment (in a test rig, lid off! for short periods of time) in SE mode > on an ATTO and it is faster than I have ever had. Look, before I pop off the > earth, I want to experience the full throttle of this however impractical>> > > Go to the ATTO support site and download ExpressPro-Tools it will benchmark > your drive's performance. In the LVD mode you should get a peak read of 48-52 > MB/S . At least that's what I got on my 7500 with a pair of 68 pin 7200 rpm 18 > GB WD HDD and the ATTO UL2D. The sustained rate was much lower. As I recall > around 17-18 MB read and 11-14 MB write. That was with all the proper cables > and > no adapters. Far better than the stock internal SCSI bus on the 7X00 PCI > Macs. You should see similar performance with your set up. > > OTOH, installing the same card in a G-4 Sawtooth (OS 9) with the same drives > and cables doubled the performance, IIRC. Anyway that where they are now. > --glen
I'm the one who *had to have* an adaptor and explained why (you have no quotes on this part so maybe you are thinking someone else said this? Don't worry, it is easy for this to happen!). So your experience without adaptors is not quite relevant to my situation. I can't yet run my LVD Seagate in LVD mode because I need the right card. I have done my own practical tests like transferring 600 MB of data from one partition to another or duplicating same with a stop watch. My Seagate on my ATTO in SE mode is impressive on this score and a treat is in store when I go LVD... Ideally I want an external box for it and a long long cable (it is a bit noisy!). Just bought a whole mob of stuff in a job lot and there is a card that may do the job in it... 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
