[comp.sys.amiga] HELP! Corrupted Disks

mfs@edison.GE.COM (mfs @ Somewhere in the Mountains) (06/09/88)

ACK!   HELP!

I have a new (4 month old) Amiga 500 that has started giving me all
kinds of trouble with the disks.  It seems everytime I turn around, I get
the infamous 'Volume xxxx has a read/write error' requester.  Sometimes
I can edit or download for hours before this happens and sometimes it
just takes a few minutes.

I have tried all kinds of disks: Sony, BASF, Memorex and Generics.
They all seem to eventually go bad.  The funny thing is, when I run
diskdoctor on them, they all (with rare exceptions) have hard errors
on track 40.  Also, after diskdoctor finishes, I get a requester
that says: Insert volume Lazarus.  I have never had a disk named this!
What exactly is going on here ?! 

AAAARRRRGGGG!

Jeeze, is AmigaDOS that fragile ?  Do I have a bad drive ?  A virus ?
Overheating problems ? Wimpy power supply ? (I have the A501, but only
one drive)

Any help or recommendations would be greatly appreciated!!

Thanks,

Martin

grr@cbmvax.UUCP (George Robbins) (06/11/88)

In article <1544@edison.GE.COM> mfs@edison.GE.COM (mfs @ Somewhere in the Mountains) writes:
> 
> I have a new (4 month old) Amiga 500 that has started giving me all
> kinds of trouble with the disks.  It seems everytime I turn around, I get
> the infamous 'Volume xxxx has a read/write error' requester.  Sometimes
> I can edit or download for hours before this happens and sometimes it
> just takes a few minutes.
> 
> I have tried all kinds of disks: Sony, BASF, Memorex and Generics.
> They all seem to eventually go bad.  The funny thing is, when I run
> diskdoctor on them, they all (with rare exceptions) have hard errors
> on track 40.  Also, after diskdoctor finishes, I get a requester
> that says: Insert volume Lazarus.  I have never had a disk named this!
> What exactly is going on here ?! 

Sounds for sure like some kind of drive alignment problem or other
drive related defect...

-- 
George Robbins - now working for,	uucp: {uunet|ihnp4|rutgers}!cbmvax!grr
but no way officially representing	arpa: cbmvax!grr@uunet.uu.net
Commodore, Engineering Department	fone: 215-431-9255 (only by moonlite)

doug-merritt@cup.portal.com (06/12/88)

Martin writes:
>diskdoctor on them, they all (with rare exceptions) have hard errors
>on track 40.

This is invariably a symptom of some software doing "Delay(0)" (a bug
in the OS later causes track 40 problems). You're probably using some
old PD software; often these bugs get fixed in later releases, so
(A) try upgrading any old software, and (B) try and pin down which s/w
you ran just prior to finding the problem.

>Also, after diskdoctor finishes, I get a requester
>that says: Insert volume Lazarus.  I have never had a disk named this!

The name "Lazarus" is a joke. You know, like Heinlein's character
Lazarus Long, who lived forever? But your disk didn't. Hey, it's not *my* joke.
"Lazarus" may originally have been a biblical name (cohort of Methusaleh?).

There's a small amount of extra information about this situation that
I can't recall; I know I'm forgetting something...

A recommendation: never, never, never use diskdoctor. It's just not
very good. Instead use the freeware program Disksalv (from an early
fish disk). It does a good job of recovering the damaged disk to a
new disk.
	Doug
--
      Doug Merritt        ucbvax!sun.com!cup.portal.com!doug-merritt
                      or  ucbvax!eris!doug (doug@eris.berkeley.edu)
                      or  ucbvax!unisoft!certes!doug

phils@tekigm2.TEK.COM (Philip E Staub) (06/12/88)

In article <4005@cbmvax.UUCP> grr@cbmvax.UUCP (George Robbins) writes:
<In article <1544@edison.GE.COM> mfs@edison.GE.COM (mfs @ Somewhere in the Mountains) writes:
<> 
<> I have a new (4 month old) Amiga 500 that has started giving me all
<> kinds of trouble with the disks.  It seems everytime I turn around, I get
<> the infamous 'Volume xxxx has a read/write error' requester.  Sometimes
<> I can edit or download for hours before this happens and sometimes it
<> just takes a few minutes.
<> 
<> I have tried all kinds of disks: Sony, BASF, Memorex and Generics.
<> They all seem to eventually go bad.  The funny thing is, when I run
<> diskdoctor on them, they all (with rare exceptions) have hard errors
<> on track 40.  Also, after diskdoctor finishes, I get a requester
<> that says: Insert volume Lazarus.  I have never had a disk named this!
<> What exactly is going on here ?! 
<
<Sounds for sure like some kind of drive alignment problem or other
<drive related defect...
<
<-- 
<George Robbins - now working for,	uucp: {uunet|ihnp4|rutgers}!cbmvax!grr
<but no way officially representing	arpa: cbmvax!grr@uunet.uu.net
<Commodore, Engineering Department	fone: 215-431-9255 (only by moonlite)

Sounds more to me like the infamous Delay(0) bug. By any chance are you
using an older version of Steve Drew's shell? (like about 2.4, I think).
There was one of those versions which I had regular problems similar to what
you describe. The shell had a certain configuration in which it could call
Delay() with a parameter of '0' and somehow (I've never bothered to
investigate either the source in the Shell or the cause of the problem in 
Delay, but I seem to remember Neil Katin posting something a while back
indicating that the bug is indeed in Delay and would be fixed... sooner or
later)

To check this: don't use the shell. To fix: get a newer version.

Also, Lazarus is the name which DiskDoctor gives any disk which it has
"resurrected".


Phil
-- 
------------------------------------------------------------------------------
Phil Staub        
Tektronix, Inc., Vancouver, Washington 98668
phils@tekigm2.MEN.TEK.COM

phils@tekigm2.TEK.COM (Philip E Staub) (06/12/88)

In article <3052@tekigm2.TEK.COM> phils@tekigm2.UUCP I write:
...
>you describe. The shell had a certain configuration in which it could call
>Delay() with a parameter of '0' and somehow (I've never bothered to
>investigate either the source in the Shell or the cause of the problem in 
>Delay, but I seem to remember Neil Katin posting something a while back
>indicating that the bug is indeed in Delay and would be fixed... sooner or
>later)
...

Talk about a dangling run on sentence. Sorry about that. What I meant to say
was that somehow the Delay(0) and the trashing of track 40 are related.
Apparently, track 40 takes the hit most frequently since it is the location
of the root block, and AmigaDos spends so much time there.

Actually, I seem to recall reading about some other software packages which
do this same thing, but the shell is the only one I've personally
encountered.


Phil
-- 
------------------------------------------------------------------------------
Phil Staub        
Tektronix, Inc., Vancouver, Washington 98668
phils@tekigm2.MEN.TEK.COM

grr@cu-arpa.cs.cornell.edu (George Robbins) (06/13/88)

<In article <1544@edison.GE.COM> mfs@edison.GE.COM (mfs @ Somewhere in the
< Mountains) writes:
<>
<>  [Misc failure mode stuff eaten...... along with list of disk types ]
<> They all seem to eventually go bad.  The funny thing is, when I run
<> diskdoctor on them, they all (with rare exceptions) have hard errors
<> on track 40.  Also, after diskdoctor finishes, I get a requester
     ^^^^^^^^^^
<> that says: Insert volume Lazarus.  I have never had a disk named this!
<> What exactly is going on here ?!
<
<Sounds for sure like some kind of drive alignment problem or other
<drive related defect...
<
<--
<George Robbins - now working for,    uucp: {uunet|ihnp4|rutgers}!cbmvax!grr
<but no way officially representing    arpa: cbmvax!grr@uunet.uu.net
<Commodore, Engineering Department    fone: 215-431-9255 (only by moonlite)


I suspect that i'm not really qualified to be commentingcu
about this  but it sounds all like the infamous timer.device
bug....
(remember DELAY(0) folks?????)

TRACK 40 was what got eaten by this wasn't it?????


Jonathan Crone
1
--------------------------------------------------------------------
Jonathan P. Crone
Vice President, AURA,  (Amiga Users of Regina Associated.)
(Regina, Sask. Canada )    (eh???)

CRONEJP@UREGINA1.BITNET
....rutgers!mimsy!uunet!mcl!cronejp

come on now....  does ANYONE give a damn about what i have to say?
--------------------------------------------------------------------

andy@cbmvax.UUCP (Andy Finkel) (06/13/88)

In article <3052@tekigm2.TEK.COM> phils@tekigm2.UUCP (Philip E Staub) writes:
>Delay, but I seem to remember Neil Katin posting something a while back
>indicating that the bug is indeed in Delay and would be fixed... sooner or
>later)
>

Timer.device  ...the bug is in the timer.device.  Delay calls the timer.device.
-- 
andy finkel		{ihnp4|seismo|allegra}!cbmvax!andy 
Commodore-Amiga, Inc.

"C combines the power of assembly language with the flexibility of
 assembly language."
		
Any expressed opinions are mine; but feel free to share.
I disclaim all responsibilities, all shapes, all sizes, all colors.

mkd@mtunh.ATT.COM (Mark Darby) (06/14/88)

> Talk about a dangling run on sentence. Sorry about that. What I meant to say
> was that somehow the Delay(0) and the trashing of track 40 are related.
> Apparently, track 40 takes the hit most frequently since it is the location
> of the root block, and AmigaDos spends so much time there.
> 
> Actually, I seem to recall reading about some other software packages which
> do this same thing, but the shell is the only one I've personally
> encountered.
> 


OK, here's a possible example....

I have a copy of the PROBE SEQUENCE demo disk. Just for the sake of burning
in my AMIGA 500, I pop the disk in, do a bit of disk switching between the
demo disk and the Workbench 1.2 disk, then I start the demo. It repeats
automatically, so the machine does alot of disk I/O (I have 512K memory only).

A couple of times, the demo completes with no problems. Then, occasionally,
the demo stops and I get the message "Volume DDemo1 has a read/write error".
Sometimes I click on "Retry", and the demo will continue.
This message, when it appears, always appears at the same time (i.e. after
a particular demo screen is shown). 

The demo uses "The Director." 

To see if the disk is corrupt, I made another copy of the demo disk, then used
the new copy. The demo then ran uninterrupted for quite some time (more than 6
times) before I shut the machine off. 

Is the Delay(0) bug intermittent, thus possibly causing my intermittent demo
interruption? Or am I possibly dealing with just a standard disk alignment
problem?


Mark K. Darby
AT&T Information Systems                    phone: (201)957-2706
200 Laurel Ave.                              uucp:..!rutgers!mtune!mtunh!mkd
Middletown, NJ 07748                           or ..!ihnp4!attunix!mtunh!mkd

cjp@antique.UUCP (Charles Poirier) (06/14/88)

In article <6428@cup.portal.com> doug-merritt@cup.portal.com.UUCP writes:
>Instead use the freeware program Disksalv (from an early fish disk).
                 ^^^^^^^^
Shareware, I believe, unless he's changed its status.  It's a great
utility, and well worth sending Dave Haynie ten bucks or so.


-- 
	Charles Poirier   (decvax,ucbvax,mcnc,attmail)!vax135!cjp

   "Docking complete...       Docking complete...       Docking complete..."

neil@amiga.UUCP (Neil Katin) (06/14/88)

In article <4010@cbmvax.UUCP> andy@cbmvax.UUCP (Andy Finkel) writes:
>In article <3052@tekigm2.TEK.COM> phils@tekigm2.UUCP (Philip E Staub) writes:
>>Delay, but I seem to remember Neil Katin posting something a while back
>>indicating that the bug is indeed in Delay and would be fixed... sooner or
>>later)
>Timer.device  ...the bug is in the timer.device.  Delay calls the timer.device.

Yes, It's fixed.  Unfortunately, there's a very long lead time between
us "fixing it in the lab" and it making it out there to the field.
Sigh.

	Neil "waiting for 1.4" Katin

neil@amiga.UUCP (Neil Katin) (06/14/88)

In article <632@mtunh.ATT.COM> mkd@mtunh.ATT.COM (Mark Darby) writes:
>Is the Delay(0) bug intermittent, thus possibly causing my intermittent demo
>interruption? Or am I possibly dealing with just a standard disk alignment
>problem?

The Delay(0) bug is timing dependent (no surprise there...).  Basically,
it loses time from the previous request on the list: sometimes all
of it.

A continuous loop of Delay(0)'s and a continous loop of trackdisk
operations will trash disks about on in 147,000 delays.  This is
about 3 minutes of wall clock time, when both the disk is
continuously busy and there is an endless supply of Delay(0)'s.
I have no doubt that some peoples systems will fail more often, but
that's what my tests showed.  The problem manifests itself by the
trackdisk not waiting the proper amount of time while writing a
track.

Once again, this is fixed in 1.4.  We're exploring ways to
release a patch before that, but until we figure it out,
the official line is "wait for 1.4".

	Neil Katin

bts@sas.UUCP (Brian T. Schellenberger) (06/15/88)

In article <6428@cup.portal.com> doug-merritt@cup.portal.com writes:
|Martin writes:
|The name "Lazarus" is a joke. You know, like Heinlein's character
|Lazarus Long, who lived forever? But your disk didn't. Hey, it's not *my* joke.
|"Lazarus" may originally have been a biblical name (cohort of Methusaleh?).

Heavens, what are they teaching kids in school these days?   Oh, sorry, 
ACLU took care of that.  Talk about not knowing Western culture . . .

Anyway, Lazarus is the first man whom Jesus Christ resurected.  The Heinlein
story was making a biblical allusion.  Try watching "Jesus of Nazarath" next
time it comes on (usually shows every Easter [that's in the spring]), on two
nights).  You'll probably learn a lot about your own culture.
-- 
 _______________________                             __Brian___________________
|Brian T. Schellenberger| "The Earth is but one     | ...!mcnc!rti!sas!bts     |
|104 Willoughby Lane    | country, and Mankind its  |work: (919) 467-8000 x7783|
|Cary, NC   27513       | citizens" --Baha'u'llah   |home: (919) 469-9389      |

mph@rover.UUCP (Mark Huth) (06/16/88)

In article <1544@edison.GE.COM> mfs@edison.GE.COM (mfs @ Somewhere in the Mountains) writes:
>They all seem to eventually go bad.  The funny thing is, when I run
>diskdoctor on them, they all (with rare exceptions) have hard errors
>on track 40.  Also, after diskdoctor finishes, I get a requester
>that says: Insert volume Lazarus.  I have never had a disk named this!

I suspect that the problem is the drive head.  I had a drive that was
very hard on disks when I got my 1000 a couple of years back.  Reeally
nasty, in that DF0: seemed to eat disks - like workbench and
kickstart.  I speculate that the head was not properly lapped and
polished, and that it therefore got dirty quickly and wore out the
disk at track 40 (root block and other good stuff).  That was the
drive that went for the 2000 upgrade trade!  I have had no problems with
the external drive, the other 1000, or the 2000 that I regularly
abuse.  

Lazarus is the name given to the disk when diskdoctor resurects it
from the dead!

Mark Huth

doug-merritt@cup.portal.com (06/19/88)

I said:
>Instead use the freeware program Disksalv (from an early fish disk).
                 ^^^^^^^^
Charles Poirier replied:
>Shareware, I believe, unless he's changed its status.

Freeware means anything that is freely redistributable as opposed to
commercial that you pay up front for. Freeware emphatically does not
mean "public domain", but it *includes* that. It also includes things
that are copyrighted but redistributable, it includes software covered
by the GNU manifesto, and it includes shareware. In fact, the only reason
the term exists at all is to cover several different "free" categories
like that without having to name them off individually.

I'm aware that some people use the term a little differently, but then
again, that's true of most words, eh? Has the term made it into a late
model dictionary yet?

If you excluded shareware from the "freeware" category, then you'd have
three categories altogether: freeware, shareware, commercial. I'd say
that's a less useful kind of usage than simply "freeware vs. commercial".
	Doug
--
      Doug Merritt        ucbvax!sun.com!cup.portal.com!doug-merritt
                      or  ucbvax!eris!doug (doug@eris.berkeley.edu)
                      or  ucbvax!unisoft!certes!doug

doug-merritt@cup.portal.com (06/22/88)

I wrote:
>"Lazarus" may originally have been a biblical name (cohort of Methusaleh?).

Brian Schellenberger wrote:
>Heavens, what are they teaching kids in school these days?   Oh, sorry, 
>ACLU took care of that.  Talk about not knowing Western culture . . .

I beg your pardon. That's rude and uncalled for.

>Try watching "Jesus of Nazarath" [...] You'll probably learn a lot about
>your own culture.

Several people have informed me of who Lazarus was; you're the only
one to do it in a self righteous and insulting way.

Just for your information, for a non-Christian I'm actually quite
well educated about Christian mythology. Compared with Christian
scholars, I know nothing at all. But since you're such a hot shot,
how would you like to chat with my friend Stan Kelly-Bootle? He's
read the entire bible *in the original*. He learned Aramaic and the
other dead languages of the originals just for that purpose. And has read
all of the various Apocrypha and commentaries and all that stuff.
("But Stan, you're an atheist!" Reply: "Don't you think you should be well
informed about what it is you disbelieve???")

I'm sure you could get some cheap shots in on him with no problem.
	Doug
P.S. The history of the Church has much to do with the roots of western
culture. Knowledge of Christian mythology itself has more to do with
understanding literary references than with the culture overall.
Disguising religious intolerance in the form of cultural awareness
is inaccurate and inadvisable. But let's trade flames via email, hmm?
--
      Doug Merritt        ucbvax!sun.com!cup.portal.com!doug-merritt
                      or  ucbvax!eris!doug (doug@eris.berkeley.edu)
                      or  ucbvax!unisoft!certes!doug

mat@emcard.UUCP (Mat Waites) (06/24/88)

In article <6763@cup.portal.com> doug-merritt@cup.portal.com writes:
.
.Several people have informed me of who Lazarus was; you're the only
.one to do it in a self righteous and insulting way.
.
.Just for your information, for a non-Christian I'm actually quite
.well educated about Christian mythology. Compared with Christian
.scholars, I know nothing at all.

[...]

.
.Disguising religious intolerance in the form of cultural awareness
.is inaccurate and inadvisable. But let's trade flames via email, hmm?
.--
.      Doug Merritt        ucbvax!sun.com!cup.portal.com!doug-merritt



If you really wanted to trade by email, why didn't YOU????


More convinced of Lazurus's existence than Mr. Merritt's,

Mat

-- 
 W Mat Waites            |                         |
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