Somewhat of a pro SCSI testimonial and history leason: I have dealt with IDE and SCSI drives and their earlier cousins: MFM and SASI for a long time. and am somewhat of a Retro computer buff, hence my interest in this list.
For an explanation of the various drive types see: http://www.chebucto.ns.ca/Technology/HAPCS/hard_drive.html A good page on this. This page though fails to include one thing: a side note on the origins of SCSI: SCSI is a outgrowth of an earlier standard called "SASI" SASI stands for Shugart and Associates System Interface. Shugart is a name the old hands may remember as the makers of many older floppy drive mechanisms, including many of the original 8 inch drives, and, of course, the original Disk ][ for the Apple II computer. The Shugart BUS was 50 pin and was not terminated or addressed like the current SCSI. You had to thinker and tinker with the address pins till you got a functional BUS. SCSI Voodoo is nothing compared to this beast. I have an original Sider SASI drive and controller card (Xebec) for the Apple II and it still works 20 some years later... I also have 20-80mb "Profile" drives mainly Quantum mechanisms rescued from Junker Macs that are still functional. SCSI is a standard that has proved its ability to survive long after IDE drives give up the ghost -Bart (Keeper of the Network from Heck) -----Original Message----- From: Power Computing List [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 19, 2003 12:31 PM To: Power Computing List Subject: Power Computing Digest #847 Power Computing is sponsored by <http://lowendmac.com/> and... 123Inkjets.com <http://lowendmac.com/ad/123inkjets.html> Support Low End Mac <http://lowendmac.com/lists/support.html> Power Computing Digest #847 1. Re: hard drive help 2. Re: hard drive help 3. Re: hard drive help 4. Re: hard drive help Power Computing list info: <http://lowendmac.com/power/list.html> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For feed mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> List archive: <http://www.mail-archive.com/powercomputing%40mail.maclaunch.com/> ---------------------------------------------------------------------- Message-ID: <050401c2d776$8e826c20$[EMAIL PROTECTED]> From: "Regis Lee" <[EMAIL PROTECTED]> Subject: Re: hard drive help Date: Tue, 18 Feb 2003 09:52:49 -0800 Patrick, SCSI drives were designed (way back in the day) to be more (mechanically) robust and reliable than IDE drives (not to say that IDE drives aren't reliable) SCSI drives usually carries 5 yr replacement warranties where as IDE drives carry either 1 yr or 3 yr warranties.... Regis ----- Original Message ----- From: "Patrick Tolen" <[EMAIL PROTECTED]> To: "Power Computing List" <[EMAIL PROTECTED]> Sent: Tuesday, February 18, 2003 9:28 AM Subject: Re: hard drive help > David Chiu wrote: > > > Depending on the capacity you're looking for, it may be more economical to get > > an IDE card and IDE drive instead. > > > > Most narrow SCSI drives today are priced from $40 for 2/4GB to $200+ for > > 9/18GB (check www.pricewatch.com for latest pricing.) Be aware that there are > > a lot of SCA (80 pin) drives being sold "cheaply" which will require 80pin to > > 50pin adapters if your want to use them in your system. > > > > Cost of IDE card (ACard UDMA66) will run you around $50 on eBay, and 40GB IDE > > drive will cost about $80 from most vendors. > > Does anyone have a quick explanation as to why 50-pin scsi drives are more > expensive than IDE? > > > > > -- Pat > > Space/Time art > http://spacetimeart.com > > > > > -- > Power Computing is sponsored by <http://lowendmac.com/> and... > > 123Inkjets.com <http://lowendmac.com/ad/123inkjets.html> > > Support Low End Mac <http://lowendmac.com/lists/support.html> > > Power Computing list info: <http://lowendmac.com/power/list.html> > --> 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]> > List archive: > <http://www.mail-archive.com/powercomputing%40mail.maclaunch.com/> > > Using a Mac? Free email & more at Applelinks! http://www.applelinks.com > ------------------------------ From: "David Chiu" <[EMAIL PROTECTED]> Subject: Re: hard drive help Date: Tue, 18 Feb 2003 09:48:22 -0800 Message-ID: <[EMAIL PROTECTED]> Without going into details of cost structure, it had to do with volume and perception. If one assumes that development cost is the same between IDE and SCSI (which is not true BTW) volume alone makes IDE drive profitable despite much lower margin. For IDE drives, volume is so high that drive manufacturers can afford a very thin margin and still break even (or god forbid, make a profit :-) This is untrue of SCSI. SCSI drives are generally perceived as server class storage solution that requires 100% up time, whereas IDE is considered a desktop/workstation solution. ----- Original Message ----- From: "Patrick Tolen" <[EMAIL PROTECTED]> To: "Power Computing List" <[EMAIL PROTECTED]> Subject: Re: hard drive help : Does anyone have a quick explanation as to why 50-pin scsi drives are more : expensive than IDE? ------------------------------ Message-ID: <001d01c2d7b5$329875a0$[EMAIL PROTECTED]> From: "Jim and Vicki" <[EMAIL PROTECTED]> Subject: Re: hard drive help Date: Tue, 18 Feb 2003 20:21:15 -0500 Quickest explanation is volume sold, but the SCSI interface was always more expensive. Jim Snyder ----- Original Message ----- From: "Patrick Tolen" <[EMAIL PROTECTED]> > David Chiu wrote: > > > Depending on the capacity you're looking for, it may be more economical to get > > an IDE card and IDE drive instead. > > > > Most narrow SCSI drives today are priced from $40 for 2/4GB to $200+ for > > 9/18GB (check www.pricewatch.com for latest pricing.) Be aware that there are > > a lot of SCA (80 pin) drives being sold "cheaply" which will require 80pin to > > 50pin adapters if your want to use them in your system. > > > > Cost of IDE card (ACard UDMA66) will run you around $50 on eBay, and 40GB IDE > > drive will cost about $80 from most vendors. > > Does anyone have a quick explanation as to why 50-pin scsi drives are more > expensive than IDE? > ------------------------------ Message-ID: <[EMAIL PROTECTED]> From: "Stanley Weilnau" <[EMAIL PROTECTED]> Date: Tue, 18 Feb 2003 21:09:27 -0500 Subject: Re: hard drive help My PTP has narrow SCSI. On both the motherboard and the Adaptec board, the cable is 50 pin. I have used the same drive on both cables. I have both a Seagate ST32151N and Quantum VP32170 connected currently. Almost any narrow SCSI drive will work. Be careful about termination. http://www.seagate.com/support/disc/scsi/st32151n.html http://www.seagate.com/support/kb/disc/howto/interface.html#SCSI The standard drive you probably are looking at sounds like an IDE drive. Stanley Weilnau ----- Original Message ----- From: [EMAIL PROTECTED] Date: Tue, 18 Feb 2003 11:57:07 -0500 I am trying to find the right hard drive for a Powercomputing Power Center Pro. The original drive was an IBM, but the cable is 50-pin and is wider than the standard hard drive cable. Can anyone tell me what I need to look for, say when I search at Warehouse.com? Thanks, Scot -- __________________________________________________________ Sign-up for your own FREE Personalized E-mail at Mail.com http://www.mail.com/?sr=signup ------------------------------ Power Computing is sponsored by <http://lowendmac.com/> and... 123Inkjets.com <http://lowendmac.com/ad/123inkjets.html> Support Low End Mac <http://lowendmac.com/lists/support.html> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com End of Power Computing List Digest #847 *************************************** -- Power Computing is sponsored by <http://lowendmac.com/> and... 123Inkjets.com <http://lowendmac.com/ad/123inkjets.html> Support Low End Mac <http://lowendmac.com/lists/support.html> Power Computing list info: <http://lowendmac.com/power/list.html> --> 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]> List archive: <http://www.mail-archive.com/powercomputing%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
