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IWETHEY Home / IWETHEY Board / Hardware Forum / IDE, SCSI, and change
Post #32,938
by kmself
Picture of kmself
3/20/02 9:19:40 PM
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New IDE, SCSI, and change
Interesting comment on the spec change. I threw this out to someone else, and the response was "well, you could say the same for SCSI". My sense, though, is that SCSI updates tend to be less frequent, less drastic, and more bidirectionally compatible -- with a cable conversion, you can run newer drives on older cards, and/or vice-versa, though you'll miss enhancements of the newer side of the combination.

Comments?
--
Karsten M. Self [link|mailto:kmself@ix.netcom.com|kmself@ix.netcom.com]
[link|http://kmself.ix.netcom.com/|[link|http://kmself.ix.netcom.com/|http://kmself.ix.netcom.com/]]
What part of "gestalt" don't you understand?
Post #32,943
by tonytib
3/20/02 9:32:11 PM
Reply
New SCSI is better, but not always
(Again, corrections and additions welcome)
IDE has been very upwards compatible for non-RAID systems, e.g. I can use ATA-33 drives with an ATA-100 controller, and ATA-100 drives with ATA-33 controllers.

OTOH, I interpret Andrew as saying that the IDE RAID controllers aren't that compatible, so a ATA-66 RAID controller might not work well with ATA-100 drives.

Many of the SCSI generations are compatible (SCSI-I/II/Ultra), but when SCSI went to LVD (SCSI-3? I know SCSI-160 is LVD), the newer (LVD) devices aren't compatible with the older (SE) devices, because the signaling voltages and methods are so different. However, I would expect SCSI-3 (80 MB/sec) and SCSI-160 to be pretty compatible, and most likely SCSI-320 as well.

Tony
     3Ware RAID: add replacement drive to degraded array - (kmself) - (36) - March 15, 2002, 02:16:52 AM EST
         Sounds like a card not drive problem to me. - (Another Scott) - (35) - March 15, 2002, 07:53:20 AM EST
             Also-check the signal cable to the "bad" drive.Intermittent? -NT - (Another Scott) - March 15, 2002, 08:36:03 AM EST
             Suspect you're right - (kmself) - March 15, 2002, 02:12:59 PM EST
             JBOD v. RAID on new disk insertion - (kmself) - (32) - March 15, 2002, 04:56:43 PM EST
                 Re: JBOD v. RAID on new disk insertion - (morganek) - (31) - March 16, 2002, 01:50:55 PM EST
                     Following procedure...confirms bad card - (kmself) - (30) - March 17, 2002, 04:14:22 AM EST
                         Re: SCSI. - (a6l6e6x) - (29) - March 17, 2002, 04:05:17 PM EST
                             IDE RAID - (Andrew Grygus) - (28) - March 17, 2002, 05:04:34 PM EST
                                 Interesting - (kmself) - (27) - March 17, 2002, 11:50:19 PM EST
                                     Have you guys seen the discussion on IBM's 120GXP 10 hr/day? - (tonytib) - (26) - March 18, 2002, 01:30:27 AM EST
                                         Heard about it, yeah -NT - (kmself) - March 18, 2002, 04:09:26 AM EST
                                         Components - (Andrew Grygus) - (3) - March 18, 2002, 11:00:45 AM EST
                                             Thanks -NT - (tonytib) - March 18, 2002, 02:43:02 PM EST
                                             IDE, SCSI, and change - (kmself) - (1) - March 20, 2002, 09:19:40 PM EST
                                                 SCSI is better, but not always - (tonytib) - March 20, 2002, 09:32:11 PM EST
                                         Re: IBM's 120GXP only 10 hr/day. - (a6l6e6x) - (20) - March 19, 2002, 11:04:16 PM EST
                                             But they won't guarentee it for >3 years - (tonytib) - (19) - March 20, 2002, 08:01:20 PM EST
                                                 No disagreement from here. -NT - (a6l6e6x) - March 20, 2002, 08:57:25 PM EST
                                                 Highly erratic - (Andrew Grygus) - (1) - March 21, 2002, 12:17:57 AM EST
                                                     I especially love that last comment! -NT - (tonytib) - March 21, 2002, 11:28:38 AM EST
                                                 Interesting.... Very interesting... [RANT] not just at Tony - (folkert) - (15) - March 21, 2002, 09:15:46 PM EST
                                                     Greg, I've been looking at actuators for six years now - (tonytib) - (3) - March 21, 2002, 09:46:09 PM EST
                                                         Then why do we never here about... - (folkert) - (2) - March 21, 2002, 11:05:09 PM EST
                                                             Could be a bunch of reasons: - (Andrew Grygus) - March 22, 2002, 12:06:45 AM EST
                                                             Politics, IIRC - (tonytib) - March 22, 2002, 01:18:29 AM EST
                                                     Then what makes SCSI seem better? - (Brandioch) - (10) - March 30, 2002, 10:45:06 PM EST
                                                         The what! - (folkert) - (9) - March 30, 2002, 11:22:21 PM EST
                                                             Sounds good. - (Brandioch) - (8) - March 31, 2002, 03:24:08 PM EST
                                                                 Well, it all depends... - (folkert) - (7) - March 31, 2002, 04:27:47 PM EST
                                                                     Hey there, Greg - (Ashton) - (6) - March 31, 2002, 10:26:14 PM EST
                                                                         OT: Tek scopes - (a6l6e6x) - (3) - March 31, 2002, 10:44:51 PM EST
                                                                             Yeah.. imagine finding Art in a lab. - (Ashton) - (2) - April 1, 2002, 08:18:26 PM EST
                                                                                 Re: Yeah.. imagine finding Art in a lab. - (a6l6e6x) - (1) - April 1, 2002, 10:51:18 PM EST
                                                                                     Yup.. - (Ashton) - April 2, 2002, 12:39:05 AM EST
                                                                         Hey there, Ashton - (folkert) - (1) - April 1, 2002, 12:14:08 PM EST
                                                                             Good sleuthing and thanks for the tip - (Ashton) - April 1, 2002, 07:56:30 PM EST

One. Two. Three. Ah, ha ha ha ha ha!
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