Date: Thu, 01 Sep 2005 23:48:38 -0400 Subject: [SM] Ultra SCSI From: [EMAIL PROTECTED] Message-ID: <[EMAIL PROTECTED]>
At 23:48 -0400 09/01/2005, [EMAIL PROTECTED] wrote: Hi, I'm considering the purchase of an Ultra SCSI drive (external) and controller card to use w/ my S900 ... Can I consider Ultra 2 Wide or even Ultra 160? Jeff Walther <[EMAIL PROTECTED]> wrote: Subject: Re: [SM] Ultra SCSI For compatibility the Adaptec 2940UW may be your best bet. However, I do not believe that it is supported under OSX ... The advantage of going to Ultra2Wide, AKA LVD, SCSI is that it is more tolerant of longer cable lengths. If you are using just one external drive, this is unlikely to matter ... You can do Ultra160 but there probably isn't much point to it. Ultra160 is theoretically 160 MB/s maximum transfer. The maximum theoretical transfer rate of the S900 PCI slots (and all original PCI) is 33 MHz X 4 bytes = 132 MB/s. Real PCI performance will be something less than 100 MB/s ... Additionally, real world hard drives don't deliver data that fast anyway. Unless you're going to set up a performance enhancing RAID, I don't think that real performance of hard drives is much better than 60 MB/s ... If I were buying a new SCSI card at this time, I would look at the Acard SCSI cards. Acard makes the most compatible UltraATA adapters for our machines. If they put the same quality into their SCSI cards, I'd expect them to be very good, but I've never tried one myself. You can look at all of Acard's products on their site <http://www.acard.com> and their US distributers are <http://www.microlandusa.com> and <http://www.getlaptop.com/> . Jeff Walther Jeff, Thank you so much for all the info. It has been very helpful. I also found some good comparison charts at the site below which may be of interest to anyone considering the benefits of Ultra SCSI. The site's a little over four years old but a lot of the info is still relevant and there's a good link to the subject of drive partitioning. http://www.sciencequest.org/support/computers/mac/topics/drives.html Elliot -- SuperMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | Service & Replacement Parts [EMAIL PROTECTED] | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> SuperMacs list info: <http://lowendmac.com/supermacs/list.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/supermacs%40mail.maclaunch.com/> --------------------------------------------------------------- iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com ---------------------------------------------------------------
