39 messages in org.freebsd.freebsd-hackersRe: offtopic: low level format of IDE...| From | Sent On | Attachments |
|---|---|---|
| Julian Elischer | Jul 8, 2002 1:47 pm | |
| Matthew Dillon | Jul 8, 2002 2:08 pm | |
| John Nielsen | Jul 8, 2002 2:10 pm | |
| Luigi Rizzo | Jul 8, 2002 2:19 pm | |
| Julian Elischer | Jul 8, 2002 2:22 pm | |
| Terry Lambert | Jul 8, 2002 2:36 pm | |
| Terry Lambert | Jul 8, 2002 2:39 pm | |
| Kenneth Culver | Jul 8, 2002 2:41 pm | |
| Kent Stewart | Jul 8, 2002 2:46 pm | |
| Julian Elischer | Jul 8, 2002 2:52 pm | |
| Robert Klein | Jul 8, 2002 2:53 pm | |
| Terry Lambert | Jul 8, 2002 3:02 pm | |
| Bakul Shah | Jul 8, 2002 3:14 pm | |
| Bernd Walter | Jul 8, 2002 3:17 pm | |
| Julian Elischer | Jul 8, 2002 3:21 pm | |
| Doug Barton | Jul 8, 2002 3:36 pm | |
| Kent Stewart | Jul 8, 2002 3:44 pm | |
| Peter Wemm | Jul 8, 2002 4:36 pm | |
| Matthew Dillon | Jul 8, 2002 4:39 pm | |
| Julian Elischer | Jul 8, 2002 4:51 pm | |
| Bernd Walter | Jul 8, 2002 5:32 pm | |
| Mike Silbersack | Jul 8, 2002 5:52 pm | |
| Greg 'groggy' Lehey | Jul 8, 2002 6:02 pm | |
| Terry Lambert | Jul 8, 2002 6:39 pm | |
| Chris Knight | Jul 8, 2002 7:08 pm | |
| Terry Lambert | Jul 8, 2002 7:12 pm | |
| Terry Lambert | Jul 8, 2002 7:22 pm | |
| Kris Kirby | Jul 8, 2002 7:40 pm | |
| Peter Wemm | Jul 8, 2002 7:43 pm | |
| Terry Lambert | Jul 8, 2002 7:45 pm | |
| Chris Knight | Jul 8, 2002 8:07 pm | |
| Cy Schubert - CITS Open Systems Group | Jul 8, 2002 10:12 pm | |
| Soeren Schmidt | Jul 9, 2002 1:39 am | |
| Don Lewis | Jul 9, 2002 3:28 am | |
| David Gilbert | Jul 9, 2002 4:00 am | |
| Chuck Robey | Jul 9, 2002 5:56 pm | |
| Sergey Babkin | Jul 10, 2002 5:23 pm | |
| Terry Lambert | Jul 10, 2002 5:57 pm | |
| David Schultz | Jul 11, 2002 4:08 am |
| Subject: | Re: offtopic: low level format of IDE drive. | |
|---|---|---|
| From: | Don Lewis (dl-f...@catspoiler.org) | |
| Date: | Jul 9, 2002 3:28:59 am | |
| List: | org.freebsd.freebsd-hackers | |
On 8 Jul, Peter Wemm wrote:
Julian Elischer wrote:
this is not a 'reformat'
what I want to do is an old-fashionned refomat/verify where the controller writes new track headers etc.
The thing is, just about all IDE drives more than a few GB or so do 'track writing' and have no fixed sectoring or sector positioning. ie: each time you write a single sector to a track, it does a read-modify-write of *THE ENTIRE TRACK*. This is why we have to have write caching turned on for IDE drives to get decent performance. Without it, it essentially rewrites the entire track over and over and over again because it cannot fill its write buffer in order to write a contiguous block to completely replace what was there before. ie: each track is one giant physical sector with multiple logical sectors inside it.
The really annoying thing is that most newer scsi drives do this too.
How readily available is the information about which drives do this? As someone who only buys the occasional drive, I'd rather not have to buy one and do the evaluation myself using the method mentioned later in this thread.
Get a UPS if you value the data. :-]
That doesn't help if the cat knocks a book off the shelf onto the power switch, or if you trip over the cord between the UPS and the computer, or if the magic smoke escapes from the computer power supply.
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