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From: Rob B on 18 Jan 2006 01:35 "James Sweet" <jamessweet(a)hotmail.com> wrote in message news:Lhjzf.28658$MG1.26001(a)trnddc05... > chrisv wrote: > > Rob B wrote: > > > > > >>>Hard drives have very powerful neodymium magnets in the servo actuator > >>>for the read/write head assembly. You have to be careful not to pinch > >>>your fingers between them but they're cool to play with. > >> > >>has anyone ever pinched the fingers ? i bought some of these neodynium > >>"warning extra strong" magnets from hardware store and skeptical i tried to > >>pinch my fingers and have had no luck, well if that is the label to give > >>such actions :) > > > > > > Yes I've gotten nasty blood blisters on several occasions. Take apart > any 3.5" hard drive and pull the magnets out, they'll stick to each > other very strongly. If you can find an old 5.25" SCSI drive you'll > likely find even bigger magnets. > ok curiosity has the better of me , i have several pandora drives stuffed in a box, couple of old 420 mb scsi out of old sun classics some old 180 - 1.2GB drives lying around, i will be going on the magnet hunt shortly. too bad i just recently dumped an old 1 GB 5 1/2 full height scsi out of old HP/UX box it made a great desk anchor
From: James Sweet on 18 Jan 2006 02:03 Folkert Rienstra wrote: > "James Sweet" <jamessweet(a)hotmail.com> wrote in message news:rzYyf.15937$h47.10775(a)trnddc08 > >>mm wrote: >> >>>On 16 Jan 2006 08:17:07 -0800, "stickyfox(a)gmail.com" <stickyfox(a)gmail.com> wrote: >>>.... >>> >>> >>>>I've opened hard drives again and again in very filthy rooms and >>>>they've never shown any ill effects over the days, or in some cases >>>>weeks, that I operated them. I do this all the time with old drives >>>>because I can see what's happening inside the drive while I test my >>>>control circuitry. >>>> >>>>If I was manufacturing hundreds of thousands of drives and had to worry >>>>about warranties and customer satisfaction, I'd be doing it in a clean >>>>room. And I would buy a new drive before attempting to repair a damaged >>>>one. But you definitely can operate a hard drive without the cover for >>>>a while; probably long enough to do whatever you want if you don't dawdle. >>> >>> >>>My drive is clicking, and one important partition has a very bad >>>directory structure. I'm not sure I can copy over even the good >>>partitions before it "fails". If I open it, what would I want to do >>>to stop the clicking, or to keep the clicking syndrome from preventing >>>me from copying the data to a good drive. >>> >> >>There's nothing you can do by opening it. > > >>If it's clicking that means it's unable to read the disc > > >>due to a hardware failure. > > > Nonsense. > If it's clicking it means it does a rezero every time it retries a read operation. > It does that on ECC errors and also on CRC errors on the interface. > Neither is necessarily caused by a hardware failure. > Bad power supply, overheated drive or bad data cable can cause this too. > > Every single time I've ever had a hard drive clicking it was caused by a failure of the drive, I've never even heard of it caused by those other issues, with the exception being a couple of early very hot running 10K rpm drives. Bad drive is 99% the reason.
From: Chris Lewis on 18 Jan 2006 09:33 According to Folkert Rienstra <oh all right, this time only(a)wanadoo.nl>: > "Chris Lewis" <clewis(a)nortelnetworks.com> wrote in message news:11sqeh2gu9db68(a)corp.supernews.com > > According to Folkert Rienstra <folkertdsahrienstra(a)wanadoo.nl>: > > > "Chris Lewis" <clewis(a)nortelnetworks.com> wrote in message news:11sotrss7pvgrd9(a)corp.supernews.com > > > > According to Folkert Rienstra folkertxxxxrienstra(a)wanadoo.nl: > > > Please, do not use Reply-To addresses in attribution lines. > > > Get a decent newsclient, or change your attribution line, like everyone else does. > > I assure you, trn 4 is a decent news reader, > Obviously not if it is straying from standard practice. What standard? trn set _the_ standard for more years than your newsreader has existed or you have been posting to Usenet. There is no standard on attribution lines. Indeed, the only comments on this topic I've been able to google say _exactly_ what trn is doing - reply-to if present, From otherwise. > > and substituting in the Reply-To for From: is actually the right thing to do > No, it is not. Funny, in the 20+ years I've been posting on Usenet (largely to groups specific to Usenet, Email and anti-spam standards, operations and practise), and the 10s of thousands of postings I've made to Usenet, you're the first to suggest it's wrong. > > Spammers aren't stupid enough to ignore Reply-To headers - in fact, smart > > ones would be scraping them in _preference_ to From: headers. > Practice says different. I don't think someone who uses Outlook as a newsreader should be lecturing anyone on newsreader "practise", let alone lecturing _me_ on spammer practises... Perhaps Outlook's braindamage leads you to believe that spammers can't see reply-tos. I assure you, spammers don't do this by hand. They use specialized NNTP clients, and scan _everything_ in the message - headers, bodies, everything. Valid Reply-tos are vastly more blaringly obvious than arbitrary hand munging. Any spammer with enough neurons to be able to write a generalized demunger is sure going to notice reply-to. If you don't want your email address scraped, don't include it in the posting. -- Chris Lewis, Una confibula non set est It's not just anyone who gets a Starship Cruiser class named after them.
From: Arno Wagner on 18 Jan 2006 16:25 In comp.sys.ibm.pc.hardware.storage Odie Ferrous <odie_ferrous(a)hotmail.com> wrote: > "David C. Partridge" wrote: >> >> Hmmmm why do you want to open the case of the drive? If you open it >> outside a class 1 clean room, the drive WILL die. >> >> Or are you talking about the drive mounting screws? > > Perhaps the drive already *is* dead. > Don't overestimate clean rooms - they contain 100 particles per cubic > meter as opposed to an "average" room containing 600 particles. A > "clean" "average" room will contain far less than the 600 particles. > For what it's worth, I've had a drive running non-stop for over a week > without its cover (platters exposed) and haven't had any hiccups. This > hype about "clean rooms" is a load of drivel. Interessting. Arno
From: Folkert Rienstra on 18 Jan 2006 17:40
"James Sweet" <jamessweet(a)hotmail.com> wrote in message news:hLlzf.16289$sq.7248(a)trnddc01 > Folkert Rienstra wrote: > > "James Sweet" <jamessweet(a)hotmail.com> wrote in message news:rzYyf.15937$h47.10775(a)trnddc08 > > > mm wrote: > > > > On 16 Jan 2006 08:17:07 -0800, "stickyfox(a)gmail.com" <stickyfox(a)gmail.com> wrote: > > > > .... > > > > > I've opened hard drives again and again in very filthy rooms and > > > > > they've never shown any ill effects over the days, or in some cases > > > > > weeks, that I operated them. I do this all the time with old drives > > > > > because I can see what's happening inside the drive while I test my > > > > > control circuitry. > > > > > > > > > > If I was manufacturing hundreds of thousands of drives and had to worry > > > > > about warranties and customer satisfaction, I'd be doing it in a clean > > > > > room. And I would buy a new drive before attempting to repair a damaged > > > > > one. But you definitely can operate a hard drive without the cover for > > > > > a while; probably long enough to do whatever you want if you don't dawdle. > > > > > > > > My drive is clicking, and one important partition has a very bad > > > > directory structure. I'm not sure I can copy over even the good > > > > partitions before it "fails". If I open it, what would I want to do > > > > to stop the clicking, or to keep the clicking syndrome from preventing > > > > me from copying the data to a good drive. > > > > > > > > > > There's nothing you can do by opening it. > > > If it's clicking that means it's unable to read the disc > > > > > due to a hardware failure. > > > > Nonsense. > > If it's clicking it means it does a rezero every time it retries a read operation. > > It does that on ECC errors and also on CRC errors on the interface. > > Neither is necessarily caused by a hardware failure. > > Bad power supply, overheated drive or bad data cable can cause this too. > > > > Every single time I've ever had a hard drive clicking it was caused by a > failure of the drive, So either you have a pathetically inadequate small sample or you are killing all your drives. > I've never even heard of it So you obviously should refrain from commen- ting as if you are the resident expert on this. > caused by those other issues, with the exception being > a couple of early very hot running 10K rpm drives. As if that can't happen to IDE drives. > Bad drive is 99% the reason. In your case. You are known as a 'pathetically inadequate sample'. |