Input-Output problem :)

The thing that I do not understand is : How can System.out.println(tmp)
prints Name and Id at the same time: Is it possible?
tmp has two variables,name and id...

Hi Gallimaufry,
Prorok is right. If you want to get your specific output
Name : ....
ID : ....
you need to overwrite the toString() method inherited from java.lang.Object and format your output in that method. Then you just print it with System.out.println(tmp).

Similar Messages

Keyboard Input Output Problems on Mac OS X

Hey guys,
I'm at college studying Java, however my teacher and the rest of the class all use the Kawa IDE, I've been using Project Builder, provided with Mac OS X. Our tutor gave us a class made up of various methods which the college designed to handle keyboard Input and Output, however when I import it I get unpredictable results. I've put it online at: http://www.lostroom.co.uk/inout/
All I'm trying to do is run a simple program;
import InOut;
class CostReckoner
public static void main(String[] args)
// Declare the variables
int quantity;
double unitCost, basicCost, vatCost, totalCost;
double vatRate = 0.175;
// Input the number of items and the cost per item
System.out.print("What is the unit cost of the items?");
unitCost = InOut.readDouble();
System.out.print("How many items in the order?");
quantity = InOut.readInt();
// Calculate the cost of the order
basicCost = unitCost * quantity;
vatCost = basicCost * vatRate;
totalCost = basicCost + vatCost;
//Output the total cost of the order
System.out.println("Cost �"+InOut.format(basicCost,2));
System.out.println("Vat �"+InOut.format(vatCost,2));
System.out.println("Total �"+InOut.format(totalCost,2));
I seem to need to press space bar after I input anything, as it doesn't recognise "Return" without it. Any ideas ??
Strange thing is it seems to work fine on the PC Kawa IDE within college. Any advice you guys could offer would be really appreciated. Send me an email at: <[email protected]> if you can help.
Regards, Gareth

Hi thanks for your help, I tried compiling the code you gave me to read the streams, however I seem to be have problems with it.
ERROR
keys.java:18: unreported exception java.io.IOException; must be caught or declared to be thrown
n=stream.read();
HERE IS THE CODE I'M TRYING TO COMPILE
import java.io.*;
public class keys {
public static void main(String[]arguments)
BufferedInputStream stream = new BufferedInputStream(System.in);
int n=0;
while(true){
n=stream.read();
System.out.println(Integer.toHexString(n));
if (n==0x30) break;// this termination condition is optional
Any ideas ??

Audio input/output problems with Mac Mini

at first, my sound just stopped working all together and for some reason the monitor was getting no signal from the mac mini. i unplugged everything for a minute and plugged it back in and the monitor was working again, but still nothing with the sound. no sound coming out from even the internal speaker, and the audio in jack (which i use frequently) stopped working as well.
this is the really strange part: after tinkering around trying to fix the problem i realized the only sound that comes out it is from the internal speaker, but it only comes out when i have something connected to the headphones jack.
has anyone ever had a problem like this? i'm just trying to figure out if it is something i can take care of myself, or if i might need some repairs done.

OK, then two things to do.
First reset parameter RAM - it's an area of non-volatile memory used for system settings and hardware configuration. It it gets corrupted, it can cause odd problems.
Reset PRAM
-Shut down the computer.
-Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in the next step but one.
-Turn on the computer.
-Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
-Hold the keys down until the computer restarts and you hear the startup sound for the second time.
-Release the keys.
Next, perform an SMC reset. The SMC is the device which controls system hardware and devices, so if there is a problem with hardware components not functioning, it could be that.
To reset the SMC on an Intel mini:
-From the Apple menu, choose Shut Down (or if the computer is not responding, hold the power button until it turns off).
-Unplug all cables from the computer, including the power cord and any display cables.
-Wait at least 15 seconds.
-Plug the power cord back in, making sure the power button is not being pressed at the time.
-Then reconnect your keyboard and mouse to the computer.
-Press the power button on the back to start up your computer.

I had a problem with the hard disk on a 2010 macbook pro. Replaced the hard disk with an Hitachi 1TB and when I tried to erase and format It fails with input/output error. Any help much appreciated!

I had a problem with the hard disk on a 13" 2010 macbook pro. Replaced the hard disk with an Hitachi 1TB disk but when I tried to erase and format, it fails with input/output error and at other times saying unable to allocate memory. Any help much appreciated!

Zap the PRAM and Reset the SMC, then try again.

Frequency problem in input-output control loop, LabviewRT

Hello,
I want to write a cotrol loop in LabView real-time. My target is to acquire a data from 5 channel in frequncy about 100 kHz, integrate the data and send them to the output in frequency about 10 kHz (every 10th sample). I made twou time-loops. One for acquiring and integrating, second for sending them to output. This loops are connected throug the rt fifo.
My problem is with a speed of acquisition. When I use "Hardware-timed single point" for acquiring, the result frequency is about 50 kHz. Continous sample and finite samples give me the desired frequency, but the output is not in in the same time as input (output waits until the input collects all data). Is there any problem with communication with the input and output channels in the same time?
My Hardware:
Computer: NI PXIe-8108 in NI PXIe-1062Q
card: NI PXIe-6358
My vi is attached
Attachments:
rt_headless_v1.2.vi ‏133 KB

Dear Kocman,
thanks for including your VI, it is useful to understand better your application.
However, the detailed requirements are still not entirely clear for me.
I think, starting with the right architecture and proper timing and synchronization schemes could save you a lot of effort while they ensure proper operation.
First, it should be defined what kind of timing your application requires. More specifically, if it needs to be hardware or software timed.
From your description it sounds like you would need hardware timed aquisition synchronized with generation, although your code tries to implement it using timed loops, which are inherently software timed.
You can find some useful additional information about the two methods and a nice white paper about synchronization techniques here:
http://zone.ni.com/reference/en-XX/help/370466V-01/TOC11.htm
http://www.ni.com/white-paper/4322/en
Probably it helps to review them or even try to test some of the methods to get a better feeling about it.
I hope this helps you to get to the proper solution.
Best Regards,
Adam Cseh
Applications/Systems Engineer
National Instruments

Input/Output And Method Not Found Problem

Ok so firstly I think I should apologise on two fronts.
Firstly, 'cause this is probably posted in the wrong board but I'm not sure this was suitable for the Swing board just 'cause I've been using Swing? And secondly 'cause the code I'm gonna post is so shoddy I would think this constitutes as flaim-bait. >_>
In my defense this is purely for a little class project to give something to write some documentation on so I'm really not too bothered about the efficiency or ace-mazingness of the end result. I just want it to work.
To the problem at hand.
I'm trying to write a program that asks the user a question and then outputs their answer to a file, from which a tally of answers can later be made for the purpose of displaying "results".
My problem is I've been having problems with the input/output of saving the answers given to the program.
I'm still learning and input/output is probably my weakest subject (other than, y'know, being good at Java). I've had a bash at it in the following code but all it does it overwrite what is in the file with a single answer so no list of results accumulate. I generally don't have an idea what to try for that one so any pointers would be appreciated.
Also, my second problem is, in trying to gather results by tallying what is contained in the file, I've run across a problem with the charAt() method not being found and I'm not sure why. Isn't that method a part of java.lang?
Here's the code thus far:
//libraries
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.text.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.text.*;
import java.io.*;
class CaseStudy {
     public static void main(String args[]) {
          GUI maininterface = new GUI();
          maininterface.setupMenu();
          maininterface.display();
class GUI {
     //for the actionlisteners
     int whatframe = 0;
     //creates mainframe and border content panel
     JFrame mainframe = new JFrame("Survey Client");
     JPanel borderpanel = new JPanel(), bottompanel = new JPanel();
     JButton quizbutton = new JButton("Take the quiz"), tallybutton = new JButton("Show Results"), submitbutton = new JButton("Submit Results"), menubutton = new JButton("Return To Menu");
     QuizQuestions toppanel = new QuizQuestions();
     QuizResults toppanel2 = new QuizResults();
     GUI() {
          //sets border in borderpanel, this spaces the main content in from the sides of the window
          borderpanel.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
          //sets up the frame and panels and adds on borders
          mainframe.setDefaultCloseOperation(mainframe.EXIT_ON_CLOSE); // exits java when clicking on close on main frame
          mainframe.getContentPane().add(borderpanel); // adds the panel as a component to the frame, the panel can hold stuffs
          borderpanel.setLayout(new BoxLayout(borderpanel, BoxLayout.PAGE_AXIS));// page_axis means it'll layout vertically
          bottompanel.setLayout(new BoxLayout(bottompanel, BoxLayout.LINE_AXIS));// line_axis means it'll layout horizontally
          //gives button an action
          quizbutton.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e1) {
                    setupQuiz();
          tallybutton.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e1) {
                    if(whatframe == 1) setupResults();
                    else {
                         int rusure = JOptionPane.showConfirmDialog(null, "Are you sure you wish to show results? Any current quiz answers won't be saved.", "Please Choose One", JOptionPane.YES_NO_OPTION);
                         if(rusure == JOptionPane.YES_OPTION) setupResults();
          menubutton.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e1) {
                    setupMenu();
          submitbutton.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e1) {
                    toppanel.doQuiz();
          borderpanel.add(bottompanel);
     public void setupMenu() {
          if(whatframe == 3) {
               bottompanel.remove(menubutton);
               borderpanel.remove(toppanel2);
          whatframe = 1;
          //adds components and lays them out
          bottompanel.add(quizbutton);
          bottompanel.add(Box.createRigidArea(new Dimension(0,10)));
          bottompanel.add(tallybutton);
          display();
     public void setupQuiz() {
          bottompanel.remove(quizbutton);
          bottompanel.remove(Box.createRigidArea(new Dimension(0,10)));
          bottompanel.remove(tallybutton);
          whatframe = 2;
          bottompanel.add(submitbutton);
          bottompanel.add(Box.createRigidArea(new Dimension(0,10)));
          bottompanel.add(tallybutton);
          borderpanel.add(toppanel);
          display();
     public void setupResults() {
          if(whatframe == 1) {
               bottompanel.remove(quizbutton);
               bottompanel.remove(Box.createRigidArea(new Dimension(0,10)));
               bottompanel.remove(tallybutton);
          else {
               bottompanel.remove(submitbutton);
               bottompanel.remove(Box.createRigidArea(new Dimension(0,10)));
               bottompanel.remove(tallybutton);
               borderpanel.remove(toppanel);
          whatframe = 3;
          bottompanel.add(menubutton);
          borderpanel.add(toppanel2);
          display();
     public void display() {
          //sets the size of the frame around it's components and then shows it
          mainframe.pack();
          mainframe.setVisible(true);
          mainframe.validate(); //makes referenced container relayout it's components
class QuizQuestions extends JPanel {
     LoadingSaving loadsave = new LoadingSaving();
     JPanel popm = new JPanel(), pop1 = new JPanel(), pop2 = new JPanel(), pop3 = new JPanel(), pop4 = new JPanel();
     JFormattedTextField ques = new JFormattedTextField(), op1 = new JFormattedTextField(), op2 = new JFormattedTextField(), op3 = new JFormattedTextField(), op4 = new JFormattedTextField();
     JButton bop1 = new JButton("1"), bop2 = new JButton("2"), bop3 = new JButton("3"), bop4 = new JButton("4");
     char answer;
     QuizQuestions() {
          popm.setLayout(new BoxLayout(popm, BoxLayout.PAGE_AXIS));
          pop1.setLayout(new BoxLayout(pop1, BoxLayout.LINE_AXIS));
          pop2.setLayout(new BoxLayout(pop2, BoxLayout.LINE_AXIS));
          pop3.setLayout(new BoxLayout(pop3, BoxLayout.LINE_AXIS));
          pop4.setLayout(new BoxLayout(pop4, BoxLayout.LINE_AXIS));
          this.add(popm);
          popm.add(ques);
          popm.add(pop1);
          popm.add(pop2);
          popm.add(pop3);
          popm.add(pop4);
          pop1.add(op1);
          pop1.add(bop1);
          pop2.add(op2);
          pop2.add(bop2);
          pop3.add(op3);
          pop3.add(bop3);
          pop4.add(op4);
          pop4.add(bop4);
          //sets up question text fields
          ques.setEditable(false);
          op1.setEditable(false);
          op2.setEditable(false);
          op3.setEditable(false);
          op4.setEditable(false);
          bop1.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e1) {
                    answer = 'a';
          bop2.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e1) {
                    answer = 'b';
          bop3.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e1) {
                    answer = 'c';
          bop4.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e1) {
                    answer = 'd';
          Question1();
     public void doQuiz() {
          loadsave.save(answer);
     public void Question1() {
          ques.setValue("Who's your favourite X-Men character?");
          op1.setValue("Cyclops");
          op2.setValue("Xavier");
          op3.setValue("Wolverine");
          op4.setValue("Rogue");
class QuizResults extends JPanel {
     LoadingSaving loadsave = new LoadingSaving();
     JPanel popm = new JPanel();
     JFormattedTextField op1 = new JFormattedTextField(), op2 = new JFormattedTextField(), op3 = new JFormattedTextField(), op4 = new JFormattedTextField();
     int[] answerarray = new int[4];
     QuizResults() {
          popm.setLayout(new BoxLayout(popm, BoxLayout.PAGE_AXIS));
          this.add(popm);
          popm.add(op1);
          popm.add(op2);
          popm.add(op3);
          popm.add(op4);
          op1.setEditable(false);
          op2.setEditable(false);
          op3.setEditable(false);
          op4.setEditable(false);
          answerarray = loadsave.load();
          op1.setValue(answerarray[0]);
          op2.setValue(answerarray[1]);
          op3.setValue(answerarray[2]);
          op4.setValue(answerarray[3]);
class LoadingSaving {
     public void save(char answer) {
          FileReader fr;
          FileWriter fw;
          BufferedReader br;
          String s;
          try {
          //ERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERROR
               fr = new FileReader("casestudyoutput.txt");
               fw = new FileWriter("casestudyoutput.txt");
               br = new BufferedReader(fr);
               if (br.readLine() == null) s = "x";
               else s = br.readLine();
               s = s + answer;
               fw.write(s);
               fr.close();
               fw.close();
          //ERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERROR
          catch(FileNotFoundException exc) {
               JOptionPane.showMessageDialog(null, "File not found.");
               return;
          catch(IOException exc) {
               JOptionPane.showMessageDialog(null, "Something bad happened.");
               return;
     public int[] load() {
          FileReader fr;
          BufferedReader br;
          int[] answerarray = new int[3];
          String s;
          long length;
          int a = 0, b = 0, c = 0, d = 0;
          answerarray[0] = 0;
          answerarray[1] = 0;
          answerarray[2] = 0;
          answerarray[3] = 0;
          try {
               fr = new FileReader("casestudyoutput.txt");
               br = new BufferedReader(fr);
               if (br.readLine() == null) return answerarray;
               else s = br.readLine();
               length = s.length();
               for(int i = 0; i < length; i++) {
                    char ch = charAt(i); //ERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERROR
                    switch(ch) {
                         case 'a':
                              a++;
                              break;
                         case 'b':
                              b++;
                              break;
                         case 'c':
                              c++;
                              break;
                         case 'd':
                              d++;
                              break;
               answerarray[0] = a;
               answerarray[1] = b;
               answerarray[2] = c;
               answerarray[3] = d;
               fr.close();
          catch(FileNotFoundException exc) {
               JOptionPane.showMessageDialog(null, "File not found.");
               return answerarray;
          catch(IOException exc) {
               JOptionPane.showMessageDialog(null, "Something bad happened.");
               return answerarray;
     return answerarray;
}Any pointers/tips/solutions/angry posts to tell me to stop trying to learn Java would be greatly appreciated.
Thanks in advance!
Oh, and in trying to work with it a bit further I realised I'm having a few problems with runtime errors due to exceptions. The first was due to the array being assigned out of bounds (fixed in the above code). But the second reads the following:
Exception in thread "main" java.lang.NullPointerException
     at Loadingsaving.load(CaseStudy.java:330)
     at QuizResults.(init)(CaseStudy.java.259)
     at GUI.(init)(CaseStudy.java:34)
     at CaseStudy.main(CaseStudy.java:15)Not quite sure what this one means or how to handle it. =\
Edited by: ThePermster on May 19, 2008 8:08 AM

A NullPointerException means a method has been called on a null object, or a variable that isn't pointing to any object. Your Exception points to line 330, which is:
length = s.length();A NPE on that line means that s is null. So let's look at where s is set:
if (br.readLine() == null) return answerarray;
else s = br.readLine();s gets it's value from br.readLine(), so that method must be returning null. You have a logical error here. Look at your If-Else. It reads a line, makes sure it isn't null...then it reads another line. Well what if that line is null? You are performing 2 reads here instead of 1.
Since your If condition returns a value, there's no need for an Else. The code will continue on until it reaches another return. Try this:
s = br.readLine();
if (s == null) return answerarray;

.dmg problem input/output error

hi,
i have a copy of adobe cs3 from my college, and i am having problems installing. i skipped the verification. and then i noticed it would only install about 3 components, not illus. photoshop, or flash, then i let the verify run, and then it came up with an error of "input/output error" how is it possible to save the files on the dvd, what are my options?
also, another sidenote, i have had a weird problem with i tunes, since 7.6.2 and my software is all up to date. if i run i tunes, it could be 10 secs or after about 10 mins. the pinwheel comes up and wont go away, how can i check in system monitor if theres somehting fishy, has anyone heard of this problem ? i was thinking to downgrade since i have not had problems until i upgraded

HI Gene,
"This usually works fine but now and then I get an error that says " Unable to create disk1s10.dmg Input/output error." Have you downloaded and installed any 3rd party software or changed any preference files since you've successfully done this before ??
If your profile is correct, you might try updating from 10.4.8 to 10.4.11. If you do, make sure and Repair Disk Permissions when it's finished.
Suggestion here for using Console: http://forums.macosxhints.com/showthread.php?t=67302
Carolyn
Message was edited by: Carolyn Samit

Problem Removing Files: Input/Output Error

I recently posted this article
http://discussions.apple.com/thread.jspa?messageID=4596969#4596969
about my struggles to repair my hard drive. I'm currently in Single-User Mode, in the process of manually removing files that returned the error "Overlapped Extent Allocation" during fsck. Everything's going well for the most part, but a few of the files I'm finding can't be removed. When I try, I receive this message:
hfs: WARNING - blocks on volume Garfunkel not allocated!
rm: [path name]: Input/output error
It all sounds very dire and life-threatening, but I have no idea what this means. I can only assume it means there is a permissions issue. Am I close? Is there a way I can remove these files? So far all of the files have been iCalendar files or iApps preference files. If it's important, I can list the exact files. I hope someone can help me, because I know very little about Unix.
Thanks to everyone who makes an attempt at rescuing me!

Thanks. I did that, as per the Apple Support article instructions, but apparently I have to do it before every remove command. And sometimes, I have to input the command twice for it to work. Thanks for the tip.

External Hard Drive Input/Output error

I recently started having problems with an external hard drive setup that I did not have problems with prior to upgrading to 10.5.5 and trying to setup the drive to be compatible with Time Machine.
The hard drive enclosure that I have has 2 bays for two SATA drives. I have used this enclosure without any problems until I tried to get 1 drive to act as the backup drive for Time Machine and the other to be storage. I formatted them using Drive Genius. I used the option for GUILD or GUIL which it said was the better format for using with Time Machine.
The first problem I ran into since upgrading and reformatting the drives is I got an "input/output" error the first couple times I connected the drive via USB to my Mac. I could still use the drives but I got weird errors every once in a while like "input/output error" or "device was not ejected properly" even though the device had not been unplugged.
Now the drives will not mount using OS 10.5.5. The drives show up when I open Disk Utility, but I cannot get them to mount. I have ran Disk Utility First Aid, and it says the drives are fine. There is one error that shows up when I run the "Repair Disk" feature. It reads "Invalid content in Journal". But Disk Utility also says "The volume was repaired successfully".
I have seen some posts when I do a search in google about this issue and it seems this is a known issue. Every suggestion I see says to insert your Tiger DVD and reformat the drive using that and the problem will be solved. The only problem with that is I have a lot of important files on the drive that I cannot lose. I had the files backed up until I moved them to the new drive a while back. Now I do not have a backup because I was in the process of switching to bigger drives and erased the old drives after doing so because everything was working fine.
I am hoping someone out there may have some suggestions (other than erasing the drive) to get my dives to mount so I can transfer the data off to another drive and reformat after.
Thanks,
Paul Rugg

Thanks for the suggestion.
Do you think that would work better than Drive Genius? I bought Drive Genius 2 and it does not even see the drives when they are plugged in unlike Disc Utility which can see the drives but cannot mount either one.
Maybe this following post I made to a different questions may help. The data on the drive is other buying another program for if it will work. I think my next step may be to go over to a friends place and try to mount the drives on his computer and transfer stuff off if they connect.
text below posted to other question relating to external hard drive problem.
I have recently had the same mounting issue with my new external hard drive. I just purchased a new 750Gb Western Digital Sata drive and got everything transfered over to it. Immediately, I got an error saying that the drive had been ejected incorrectly even though it was still plugged in. I was a little curious. I restarted the computer (hard drive still plugged in via USB 2.0) and the drive showed up just fine. I plugged another 250Gb drive into the same case (2 bays) and the 250GB drive showed up just fine.
Well, I then noticed there was an OS upgrade available when I ran Software update so i ran it and when I rebooted the drives were gone. I can see the drives in Disc Utility, but they will not mount. Drive Genius cannot see either disc. Disc Utility says I need to repair the drives, but when I do it says they are fixed but they don not mount.
The problem really seems to be related to mounting USB external drives. I got ahold of 2 seperate external firewire hard drives and one shows up just fine while the other has the same problem (both work on other systems. I would try wiping the drives and reformatting but ALL MY stuff is on them and not everything has been backed up. Yuck! I have not tried connecting my hard drive to another Mac yet.
The drives being used are #1 Maxtor Maxline Plus II 250GB SATA/150 HDD 1.5b/s 7Y250m00654ra
and #2 Western Digital WD7500AACS WD Caviar GP Green Power drive.
I have another post similar to this and I have not received any feedback, but I have been doing my own searching and have found similar posts on the net.
Anybody have any clue what might be going on here? It really seems to be related to my upgrade.

Disc image input/output error

When burning a disc image using disc utility, I get the ever so popular input/output error message. I cannot find anywhere on these posts a solution to this problem. It is not dirty discs, etc. It happens when I try to copy dvd's... which are not licensed, etc.

Could be so many things, Input/Output errors are generally loosing contact with a device for a variety of reasons, do you get any error # with that?
Open Console in Utilities & watch for more info whn you try to burn, or open the Disk Utility Log if there.

"input/output error' when making disc image from DVD

I've had problems installing Logic, and a Pro Apps Genius at Applecare suggested I try making an image of the problematic DVD (Audio Content 1) and then trying an install that way.
While I can make an image of the Install disc to my desktop fine, the Audio Content 1 disc reports an "input/output error".
This means I'm unable to copy the disc and then successfully install my Logic Studio.
Any ideas?

Thanks for your answer.
Yes, I thought that might be the case - but I'd taken my Mac and Logic disks to a Genius bar, and the 'Genius' had said he'd fixed the issue. I just wish he'd explained what he did and why he didn't replace the faulty disk(s)!
But is there any way around having the claim a disk, now I'm living abroad and my 'warrantee' has run out? It's going to be a pain in the fundament trying to claim a replacement set.

Input/output error when copying a DVD

I created A DVD some time ago using Roxio. It plays in DVD Player on my Mac Pro, but I can't create a .dmg using Disk Utility. I always get "Input/Output error". I got the same result on my wife's newer Apple. I tried to Restore it but can't, and Verification shows no problems that I can see. I am able to copy DVDs created on Final Cut Express just fine. Any suggestions to help me create copies of an old DVD I love?

I just figured out how to get around the problem. Download Burn and use it to burn the VIDEO_TS file to a new disk. It must be something that Apple adds to make it hard to copy DVDs made from non-Apple software.

External Hard Drive not Readable & Input/Output Error?

I was using my OWC 300gb external hard drive for a while and it's worked great. I had a bunch of files on it, but I recently transferred everything to another external HD I have, which worked fine, so I could erase this 300gb one. I can't remember what happened, but somehow my Macbook doesn't recognize this hard drive. I think erased everything and then unplugged it without ejecting it first. Anyways, nothing is on the the drive anymore and I get this error message:
"The disk you inserted was not readable by your computer"
This pops up when I restart my Macbook. When I try to use Disk Utility, it greys everything out on the partition and Disk Repair tabs. On the 'Erase' tab, it will allow me to select Erase, but then gives me the error:
"Input/Output error"
Does anyone know how to get my Macbook to see my drive (so I can start to partition it)? For some reason only Disk Utility acknowledges it's there, Finder won't.
Anyone have any tips of what it is or what I can try? I did try to use my OS discs booting up holding C, but that doesn't work either.

Hi there. Everyone is saying on these forums that the hard drive is failing...suck. I went and bought a new when I got input/output error and found that the new one showed the same input output error, making it impossible to partition the disk. Then the guy in the apple service center told me the new one was bad too, after having seen the code that came up related to my new scorpio 250 GB drive. Instead of sending it back, I took it out and installed the old one..however this time with a slihtly more of pressure on the tape holding down the hard drive cable between the hard drive and the circuit board. Amazingly, this time it didn't even show any hard drive at all! Then I understood what was wrong. It was exactly what was indicated an "input/output errror"! ..the cable was broken. I bought a new cable, well the Powerbookmedic sold it as new but it was an old working one that arrived. Immediately, after change of cable the old hard drive and now also the new 250 GB works perfectly! I remember that some interesting symptoms prior to all hard drive problems appeared, such as not being able to start up properly, strange blue screens, flipping question marks etc. I remember that shaking the comp occasionally worked to get it going. No wonder, shaking occasionally made it work and i believe the damaged cable maybe changed position and started conducting. The cable is very sensitive and probably should not be taped down so hard as the first service center guy at apple had done with mine when he fixed it the comp a few years ago. Polymers/plastics bent heavily become fragile/brittle with time and are specially sensitive under pressure/bent. Note that my old damaged cable still conducted and showed the hard drives but didn't work fully. I hope this will help someone, it took me 2 month to figure out..

External Drive Disk Erase Failed with the Error Input/Output Error

I have 2 hard drives in an external FW800 enclosure that I am unable to format. When I go to initialize the drives in Disk Utility, I get the following error message: "Disk Erase failed with the error: Input/output error."
The drives show up in Disk Utility, but I can't repair them (that option is grayed out). Disk Utility correctly ID's the manufacturer of the drives (Maxtor), their size (200gb each), so it's obviously seeing that the drives are there. But it won't let me format them.
The drives are new, by the way; they don't have any data/files on them. I have Disk Warrior, but the drives don't show up there to be repaired -- probably because they aren't formatted yet.
After looking at other posts, I tried switching the jumper settings around on the drives -- from Master/Slave to cable select and back again, but it didn't help. I also tried doing a zero erase (even though the drives are new), zapping the PRAM -- again, no help.
One question I had is whether this could be a bad FW800 cable? The cable is new -- it came with the enclosure, which is an OWC Dual FW 800 enclosure. Other than that, does anyone have any other thoughts about what's causing this? Any help would be greatly appreciated.
Matthew

SOLUTION!!!!
I had the exact same problem. I have the original 20 GB hard drive that came in my Powerbook G4 550MHz and a couple of years ago I traded up for a 60 GB drive and bought a FW/USB enclosure for my original drive to use it to backup my important files. I hadn't backed up in over a year (shame on me!) and I decided maybe I should erase the drive and start from scratch. It was connected via USB.
At that point DiskUtility gave me the exact same Input/Output error. I tried partitioning the drive into 1 or more partitions but came up with the same error. I couldn't figure out what was wrong so I decided to startup in OS 9.2.2, I did that and let it start up, then plugged in the hard drive and it gave me the standard "This disk is unrecognizable, do you want to eject or erase?" so I clicked Initalize. It worked!
Just make sure you choose the MacOS Extended option when initializing out of OS 9 (instead of the MacOS Standard option) so it can be read and viewed in OS X.
If your computer is too new to be able to boot from an OS 9 folder on your drive or an OS 9 CD, then see if a friend or a local library has older computers that are running OS 9 or can boot from it. If not let me know and you can send me your drive and I'll reformat it.
Kind of crazy...I haven't used the OS 9 partition on my HD in YEARS...was even thinking about erasing it since I don't use any Classic applications anymore...good thing I didn't!
Nick
Powerbook G4 550Mhz Mac OS X (10.4.6)

Can't acces to internal laptop hard disc - input/output error

Sometimes when I use my i can't acces to any file on my hdd and i get input/output error when i type commands in console(i even can't halt or reboot). This is used to happen suddenly after few hour of work in one session (not always, it happend three times during last week)
When i get this error the hdd control led is on (I have ibm x60s with ssd hard disc, and normaly this diod only blink sometimes, bbut when i get this error , diod is the whole time floodlite. I didn't any similar problem in google so i posted it here.

Welcome to the forums.
Not exactly alot of info to go on here. Try reading up on the "How to post" article on the wiki.
As for the trouble at hand. With the limited info given, I'd say start off with running some health checks on your disk (smartctl, fsck,...).
Last edited by Gcool (2012-03-29 05:23:32)

Input-Output problem :)

Similar Messages

Maybe you are looking for