Is Raid 50 Really safe?

I am interested in striping my to raid 5 arrays together to make 1 raid 50 (2.7 TB) array. My tech department was told by a top apple technician named keith (He supposedly designed much of the xserve raids design) that the raid 50 was not safe and that in the event of a drive failure all data would be lost. Is this true or is this top guy misinformed.
Thanks, Dylan

Ummm...
I'l sorta suspicious of a "top technician" who doesn't know much about RAID 50. Then again, RAID 50 indicates software RAID 0 on top of RAID 5, and the hardware guys don't strictly have to know about the OS that runs atop them, and what it can do.
RAID 50 is pretty safe. If you lose a drive on one of the sides (or, heck, a drive on both sides), you're fine. If you lose 2 drives on one side at the same time, you'll lose all the data on the array.
RAID 50 does have twice the risk of downtime, however. If a RAID controller goes offline, the whole array will become unavailable. As there are 2 controllers, there's twice the risk. Replace the controller, and you're back up and running without incident.
So it will double the chance of unexpected downtime, which is a relatively low percentage play anyway. But it doesn't really make data loss any more probable.

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Is it really safe to send such information? Please Help!

Hi everyone,
So, I'm "working" with an iPhone developer, who has already some apps selling on the App Store! I asked him, if he could get me a better icon of his Application for me. Then he answered me kindly, that he would be able to send me a personal preview release of the next release of the correspondent app.
However, he asked me for an info: he wants me to send the iPhone ID (which is found, by clicking on the label 'serial number').
So, is it really safe to send such information?
Any help would be greatly appreciated!
Francisco

"Safe" is a relative term. However, short of waiting for the app to be released on the iTunes App Store, that's the only way to get a version of it. The three possible ways for distributing apps are 1) the App Store, 2) direct distribution within an Enterprise organization for internally-developed apps, and 3) limited sharing by a developer with a release tied to a device serial number.
However, note that #3 may not always be possible, as reported for one developer in this linked article.
To be honest, there's not too much a developer could do with your serial number, other than release the app to you, or perhaps report your iPhone as stolen (pretty unlikely, I think).

Is it really safe/secure to do online banking in private browsing using Wi-Fi?

Is it really safe/secure to do online banking in private browsing using Wi-Fi with the https: and Firefox security blue or green on the left at the top?
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Is it more secure if my laptop was connected with wire rather than using the wireless connection?

Take a look at this:
Firefox Helps You Stay Safe - Worried about online security? We’ve got your back
* http://www.mozilla.org/en-US/firefox/security/
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Is mac really safe from viruses

Is mac really safe from viruses....

There are no know viruses that can infect your Mac OS system at the present. You can still receive and sent Windows files that are infected to Windows users. (This can be either good or bad )
Still any OS, including Mac, is open to Trojans which are malicious code that is disguised as something desirable. The latest being MacDefender, which Snow Leopard looks for and helps remove. http://support.apple.com/kb/HT4651

Is your JTable really SAFE ????????

when I grab the right most column end of the table and drag it to the left
something wierd happens...
I get all these exceptions and the table becomes useless
is there a way to block the user from making the size of the last column smaller by draging that column end to the left (Is it a bug in java????????)
thx
Exception occurred during event dispatching:
java.lang.ArrayIndexOutOfBoundsException: 4 >= 4 /* my table has 4 columns*/
     at java.util.Vector.elementAt(Vector.java:417)
     at javax.swing.table.DefaultTableColumnModel.getColumn(DefaultTableColumnModel.java:276)
     at javax.swing.JTable.accommodateDelta(JTable.java:2187)
     at javax.swing.JTable.columnMarginChanged(JTable.java:2906)
     at javax.swing.table.DefaultTableColumnModel.fireColumnMarginChanged(DefaultTableColumnModel.java:581)
     at javax.swing.table.DefaultTableColumnModel.propertyChange(DefaultTableColumnModel.java:620)
     at javax.swing.event.SwingPropertyChangeSupport.firePropertyChange(SwingPropertyChangeSupport.java:153)
     at javax.swing.table.TableColumn.firePropertyChange(TableColumn.java:242)
     at javax.swing.table.TableColumn.firePropertyChange(TableColumn.java:248)
     at javax.swing.table.TableColumn.setWidth(TableColumn.java:475)
     at javax.swing.plaf.basic.BasicTableHeaderUI$MouseInputHandler.mouseDragged(BasicTableHeaderUI.java:133)
     at java.awt.AWTEventMulticaster.mouseDragged(AWTEventMulticaster.java:260)
     at java.awt.Component.processMouseMotionEvent(Component.java:3761)
     at javax.swing.JComponent.processMouseMotionEvent(JComponent.java:2377)
     at java.awt.Component.processEvent(Component.java:3550)
     at java.awt.Container.processEvent(Container.java:1167)
     at java.awt.Component.dispatchEventImpl(Component.java:2595)
     at java.awt.Container.dispatchEventImpl(Container.java:1216)
     at java.awt.Component.dispatchEvent(Component.java:2499)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:2458)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:2212)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2132)
     at java.awt.Container.dispatchEventImpl(Container.java:1203)
     at java.awt.Window.dispatchEventImpl(Window.java:918)
     at java.awt.Component.dispatchEvent(Component.java:2499)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:336)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:134)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:101)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:96)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:88)

Ive taken some of the functions out but these are the relevant functions
I think it happens on any table
just drag the right most column seperator (the after the last column) to the left as if your trying to
make the last column smaller by dragging its right end to the left
and then watch what happens
public class DraftsPanel extends JPanel
private JScrollPane draftsScrollPanel = new JScrollPane();
private DraftsTable draftsTable = new DraftsTable();
public DraftsPanel()
try
jbInit();
catch(Exception ex)
ex.printStackTrace();
void jbInit() throws Exception
draftsScrollPanel.setBounds(new Rectangle(4, 4, 225, 171));
draftsScrollPanel.setBorder(null);
draftsScrollPanel.setFont(new java.awt.Font("SansSerif", 0, 10));
draftsScrollPanel.setAutoscrolls(true);
draftsScrollPanel.getViewport().setBackground(Color.white);
this.setLayout(null);
draftsTable.setFont(new java.awt.Font("SansSerif", 0, 10));
this.setVisible(false);
this.add(draftsScrollPanel, null);
draftsScrollPanel.getViewport().add(draftsTable, null);
draftsTable.setAutoResizeMode(JTable.AUTO_RESIZE_NEXT_COLUMN);
draftsTable.setGridColor(new Color(177, 190, 255));
draftsTable.setShowVerticalLines(false);
this.add(draftsScrollPanel, null);
public DraftsTable getDraftsTable()
return draftsTable;
public class DraftsTable extends JTable
private DraftsTableModel draftsTableModel;
public DraftsTable()
try
jbInit();
catch(Exception ex)
ex.printStackTrace();
void jbInit() throws Exception
draftsTableModel = new DraftsTableModel();
setModel(draftsTableModel);
this.setEnabled(true);
getTableHeader().setFont(new java.awt.Font("SansSerif", 0, 10));
public class DraftsTableModel extends AbstractTableModel implements TableModelListener
private final String[] columnNames={"To","Subject","Composed"};
private DraftsMessageVector draftsMessageVector = new DraftsMessageVector();
private Object[][] data={};
public static final int TO_COLUMN = 0;
public static final int SUBJECT_COLUMN = 1;
public static final int COMPOSED_COLUMN = 2;
public DraftsTableModel()
updateData();
public int getColumnCount()
return columnNames.length;
public int getRowCount()
return data.length;
public String getColumnName(int col)
return columnNames[col];
public Object getValueAt(int row,int col)
return data[row][col];
public void setValueAt(String value,int row,int col)
public void updateData()
int dataLength = data.length;
int messageVectorLength = draftsMessageVector.length();
data = new Object[messageVectorLength][columnNames.length];
try
for(int i=0 ; i < messageVectorLength ; ++i)
data[i][TO_COLUMN] = draftsMessageVector.getMessage(i).getDestination();
data[i][SUBJECT_COLUMN] = draftsMessageVector.getMessage(i).getSubject();
data[i][COMPOSED_COLUMN] = draftsMessageVector.getMessage(i).getDate();
catch (Exception e)
System.err.println(e.getMessage());
finally
try
draftsMessageVector.saveToFile();
fireTableRowsInserted(messageVectorLength-1,messageVectorLength-1);
catch(Exception e)
System.err.println(e.getMessage());
public void tableChanged(TableModelEvent e)
}

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I've connected my MBP to my LCD TV and started to use it as my desktop.
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I'm constantly monitoring the temperatures of the MBP with iStat Menus. It seems that the temperature is always the same, no matter if the main display lid is open or closed.
So, based on these 2 articles:
http://support.apple.com/kb/HT3131
http://support.apple.com/kb/HT1778
Is it really safe to use the MBP with the display lid closed?
If I decide to run a heavy load application (like a game) and the MBP starts to get warm, would it damage the display, because it is too close to the body of the MBP?

Yes it's perfectly safe and designed to be used that way, 90% of the time this one's used in a similar configuration. The only time the fans come on 100% is when I watch Flash-based items from YouTube or similar. I've never run it for any extended length of time with the fans at maximum I must admit but as long as the air flow is good there shouldn't be any problem.

RAID Volume Directory

I recently had a near melt down of an 8-disk RAID 5/0 volume. A G5 Mac running OS X Server 10.4.11 is the host.
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I am maintaining 2 backups with Retrospect 8 and another nightly sync with Carbon Copy Cloner.
Both Retrospect and Carbon Copy Cloner are reporting corruption with the same few files. These are unimportant files and deleting them is all I want to do. But I am unable to delete them.
One file is an old copy of iPhoto. When I try to empty the Trash I receive a "files are in use" message.
The other files are contained within a few deeply nested folders. When I click on those folders in the Finder they just disappear, however they do return by the next day. This folder disappearing is limited to these few folders. The rest of the RAID really seems to be healthy,
I suspect directory corruption due to bad blocks/sectors on the media.
I want to use Disk Utility to verify & repair the volume. I also want to use the HighPoint RAID tools to scan & map out the bad blocks on the media.
And here is where I am not sure on how best to proceed. Which should I do first?

I'd try deleting the files in Terminal. It doesn't care if the Finder thinks the file is busy. That might allow you to delete iPhoto anyway...
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HT201272 Hi, My name is Angelina. I don't know how to download my old purchases that i bought from iTunes store. I lost all my music when i tried to update my iPhone. I feel really lost, and i really need my music back. Is there somebody who wants to help

Hi,
I really need some help, with my loved and lost musoc. I really need to get it back. I lost all my music after i trid to update my Iphone. Can anybody help me with this? Im really desperate and i really need som help with this. It would really safe my day!

The article from which you came provides step-by-step instructions on re-downloading purchases. Where in those instructions are you encountering difficulty?

Is my flash drive safe?

I have a flash drive that is not supposed to allow password protection or encryption. Somehow I did not know that. When I set up the drive, I right clicked on it and Mavericks allowed me to encrypt it with a password. When I insert the drive into the USB on my iMac, it always asks for my password. I talked with the manufacturer of the flash drive who was baffled how Mavericks overrode its software to allow for the use of a password. I'm baffled myself. Does anyone know how this might have happened? Is this flash drive really safe?
I plugged the drive in to a Windows computer just to see what would happen, and it did not recognize the drive at all. Is this because it was formatted for an Apple computer?
Should I erase this drive and move on to a safe one, or should it be all right?

There isn't a storage device in the world that can prevent a user from password protecting the data on it. In your case, you used FileVault, but you could also use various apps to password protect a compressed archive, such as a .zip file that requires a password to open it after being created.
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There's nothing wrong with the drive the way you have it. There's no need to erase it.
Don't be overly concerned about the BBC article notcloudy was referring to. It takes deep knowledge of, and the ability to write data to the embedded EEPROM of the flash drive to do what he noted. It can't happen by simply plugging it into a computer.

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My MBP (2.33 GHz, Core2Duo) gets extremely hot. Following Apple discussions, it maybe normal. Normal but hot, especially the left part. I have heard about CoolBook, and am getting tempted to use it. However, a small question mark has entered my head. Namely, if the solution is so simple, and so very cheap, why was not it simply adopted by Apple? I guess Apple engineers were looking for the best working conditions, and thus, even if CoolBook is apparently effective, is it really safe to use it in the long run?
Rμν - ½gμνR = 8πGTμν

Is your computer not working? If it's just hot, I wouldn't use this. Notice that Apple refers to these are notebooks, not LAPtops. Don't touch bare skin with them.
They're made of aluminum to help disperse the heat, so they are going to get very warm. But messing with internals with software is something I wouldn't recommend if you don't know what you are doing.

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http://www.mac-forums.com/forums/other-hardware-peripherals/157895-mac-pro-raid- card-battery-issues.html
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Is System.arraycopy thread safe?

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please help!

what do you mean by, 'would it help'? Help thread safety? No. The method returns quicker because it is native, but it does not impact thread safety (unless you consider a quicker return to some how increase thread safety).

Max safe CPU Voltage?

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To get this I have my CPU Voltage at 1.7V. Running Prime95 with option #2, I can keep my CPU temp below 55C.
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Increasing Vcore increases the gate voltage on the transistors inside which lowers the on resistance allowing the transistors to drive their signal lines harder and thus faster. Increasing Vcore also means the signal lines need to swing farther (voltage wise) than they did before. As you continue to increase Vcore the on resistance of the transistors improves less and less as other limiting factors in the transistor take over, however the signal lines still need to swing more and more as vcore goes up. It's like being able to speed a runner in a race up, but when you do the race also gets longer. At some point the runner is going as fast as he can but the race keeps getting longer so it actually takes him longer to finish.
You want to find that sweet spot where he finishes the race the quickest.
The other problem with increasing Vcore is increasing the temperature of the die because of all the heat generated. The hotter it gets, the more the asphalt melts and the slower the runner will go. You don't want it to get to hot or things slow down.
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SATA or PATA hdd ??

Hi,
I´m planning a hdd upgrade and are a bit unsure what to choose between sata and pata disks.
Up until now I´ve preffered pata disks of several reasons but more and more of high performance hdd are running sata, so my question;
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Will I be able to run the sata disk at same FSB as my PATA ( at least 240-250fsb) without datacorruption, assuming I lock AGP/PCI to 66/33 ????
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But, Maesus, like Danny said that he only can go to around 230?
And if I'm not wrong, many users using SATA (1 or 2 which from ICH5) also reported can go only around 230. But this problem goes when they tried to use SATA 3 or 4 (which from 3rd party).
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GetParameter()==NULL and memory

Hi everybody !
I'm creating a web site where users will be able to plot data from a database.
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Does someone have an idea to explain such behaviour ?
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nodules wrote:
..in that case I'll have to execute the query in the applet, and so, on the client side which is not really safe, isn't it ?In my suggestion I think the answer is 'yes'.
.. Since I'll have to export password, etc on the client side ...Which is why ejp (who knows far more about remote access to DBs) added..
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Is Raid 50 Really safe?

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