File read and write operations

how do use file read and write operations?
can anyone give simple program?

http://www.tutorialspoint.com/cplusplus/cpp_files_streams.htm
http://www.cplusplus.com/doc/tutorial/files/
check this
and with mfc
http://www.functionx.com/visualc/fileprocessing/serialization.htm
https://msdn.microsoft.com/en-us/library/6337eske.aspx
http://www.informit.com/library/content.aspx?b=Visual_C_PlusPlus&seqNum=90

Similar Messages

Slow read and write operations on DAQmx

I am trying to build up a feedback control system using PCI-6052E and PCI-6722 cards, so that the computation of the control algorithm is performed on computer's CPU. I am trying to reach sampling period of 1kHz. It turns out that the bottleneck of my system are the read and write operations from and to cards that consume lot of processor time.
An example code (C#) that shows how the reads and writes are implemented is as attachment. On my tests the example code produces a read-time of 1000 samples on 6 channels 7.58s and a write-time of 4.69s. Is there any way to improve the performance?
The program is running on Windows XP on 1000Mhz processor.
Attachments:
DAQmxPerformanceTest.cs ‏3 KB

Petteri,
I don't have the hardware to reproduce this, but I have a few ideas. For analog output, are you creating a task, starting it, and calling write repeatedly, or are you simply calling write? While an AO Task will auto start on write, it will also go through the process of stopping when the write is complete. Which means next time you call write, the task will need to start again. It will be much more effecient if you explicitly call start on the task once, perform as many writes as required, and stop/clear the task when you are done. This same principle applies to you analog input reads as well.
I hope this helps,
Dan

Hyper-V Virtual Storage Device - Read and Write Operations/Sec

Hi,
Everything is Windows 2012 R2.
SCOM does not gather any data for the following performance counters:
Hyper-V Virtual Storage Device - Write Operations/Sec
Hyper-V Virtual Storage Device - Read Operations/Sec
Hyper-V Management Pack Extensions 2012 / 2012 R2 are imported.
If I add the counters in PerfMon, it works.
Any idea why? I've tried in several environments, DEV, QA and PROD, but it does not work anywhere.
Thanks!

To monitor Hyper-V Virtual Storage Device - Read and Write Operations/Sec, you can refer below link
http://www.aidanfinn.com/?p=15386
Please remember, if you see a post that helped you please click "Vote As Helpful" and if it answered your question, please click "Mark As Answer"

File Read and Write using File Adapter in Bpel

In Bpel Process i am using File Adapter ( Schema is Opaque) for read and write the file contents. i am able do successful deployment and read, write function in first time deployment, after that again i tired to run the application, its not going to write the content of file, its only writing the file with out data's or content in that file.
Please help me...
Saravanan

Hi Eric
In my domain.log file having the following details. In this file im unable to find out what the exact problem. Please look at this and help me.
<2008-01-22 18:25:42,024> <INFO> <default.collaxa.cube.compiler> validating "C:\product\10.1.3.1\OracleAS_1\bpel\domains\default\tmp\.bpel_BPELProcess2_1.1_298e83988d77b6640c33dfeec11ed31b.tmp\BPELProcess2.bpel" ...
<2008-01-22 18:25:49,850> <INFO> <default.collaxa.cube.engine.deployment> <CubeProcessFactory::generateProcessClass>
Process "BPELProcess2" (revision "1.1") successfully compiled.
<2008-01-22 18:25:49,914> <INFO> <default.collaxa.cube.activation> <AdapterFramework::Inbound> Loading JCAActivationAgent for {portType=Read_ptt}
<2008-01-22 18:25:49,914> <INFO> <default.collaxa.cube.activation> <AdapterFramework::Inbound> JCAActivationAgent::load - Locating Adapter Framework instance: OraBPEL
<2008-01-22 18:25:49,930> <INFO> <default.collaxa.cube.activation> <AdapterFramework::Inbound> JCAActivationAgent::load - Done loading JCAActivationAgent for processId='bpel://localhost/default/BPELProcess2~1.1/
<2008-01-22 18:25:49,930> <INFO> <default.collaxa.cube.engine.deployment> Process "BPELProcess2" (revision "1.1") successfully loaded.
<2008-01-22 18:26:02,698> <INFO> <default.collaxa.cube.activation> <AdapterFramework::Inbound> JCAActivationAgent::uninit Shutting down the JCA activation agent, processId='bpel://localhost/default/BPELProcess2~1.0/', activation properties={portType=Read_ptt}
<2008-01-22 18:26:02,698> <INFO> <default.collaxa.cube.activation> <AdapterFramework::Inbound> Adapter Framework instance: OraBPEL - performing endpointDeactivation for portType=Read_ptt, operation=Read
<2008-01-22 18:26:02,698> <INFO> <default.collaxa.cube.ws> <File Adapter::Outbound> Endpoint De-activation called in adapter for endpoint : D:\MAXIMUS_Project_Softwares\jdevstudiobase10132\jdev\mywork\MyLabs\BPELProcess2\in
<2008-01-22 18:26:02,698> <INFO> <default.collaxa.cube.activation> <AdapterFramework::Inbound> JCAActivationAgent::init - Initializing the JCA activation agent, processId='bpel://localhost/default/BPELProcess2~1.1/
<2008-01-22 18:26:02,698> <INFO> <default.collaxa.cube.activation> <AdapterFramework::Inbound> JCAActivationAgent::initiateInboundJcaEndpoint - Creating and initializing inbound JCA endpoint for:
process='bpel://localhost/default/BPELProcess2~1.1/'
domain='default'
WSDL location='rd.wsdl'
portType='Read_ptt'
operation='Read'
activation properties={portType=Read_ptt}
<2008-01-22 18:26:02,698> <INFO> <default.collaxa.cube.activation> <AdapterFramework::Inbound> Adapter Framework instance: OraBPEL - endpointActivation for portType=Read_ptt, operation=Read
<2008-01-22 18:26:02,730> <INFO> <default.collaxa.cube.activation> <File Adapter::Inbound> Endpoint Activation called in File Adapter for endpoint: D:\MAXIMUS_Project_Softwares\jdevstudiobase10132\jdev\mywork\MyLabs\BPELProcess2\in
<2008-01-22 18:26:02,730> <INFO> <default.collaxa.cube.activation> <AdapterFramework::Inbound> Adapter Framework instance: OraBPEL - successfully completed endpointActivation for portType=Read_ptt, operation=Read
<2008-01-22 18:26:02,890> <WARN> <default.collaxa.cube.activation> <File Adapter::Inbound> PollWork::run exiting, Worker thread will die
<2008-01-22 18:26:04,171> <INFO> <default.collaxa.cube.ws> <File Adapter::Outbound> Managed Connection Created
<2008-01-22 18:26:04,171> <INFO> <default.collaxa.cube.ws> <File Adapter::Outbound> Connection Created
<2008-01-22 18:26:04,171> <INFO> <default.collaxa.cube.ws> <File Adapter::Outbound> FileInteraction Created

File Read and write in Flex

hi,
can any one tell me how to read and write a file using
actionscript in flex2
regards,
Shah Mohamed

Hi all,
I have tried read and write file using AIR inturn in Flex 3
.I can able to compile it with no errors. But while i try to run
,it throw an error .and the stack trace of the error is below.. Im
in showstopper stage. kindly update me with your suggesstions .
Expecting the reply..
Thanks in advance
VerifyError: Error #1014: Class flash.filesystem::FileStream
could not
be found.
at [newclass]
at
global$init()[D:\dev\nexxus\metasoft\iGallery;com\metasoft\flex\util;MetasoftUtils.as:8]
at
com.metasoft.flex.server::MetasoftServer/getUserInfo()[D:\dev\nexxus\metasoft\iGallery;co m\metasoft\flex\server;MetasoftServer.as:146]
at
com.metasoft.flex.server::MetasoftServer/isValidUser()[D:\dev\nexxus\metasoft\iGallery;co m\metasoft\flex\server;MetasoftServer.as:17]
at
components::Login/components:Login::login()[D:\dev\nexxus\metasoft\iGallery;components;Lo gin.mxml:14]
at
components::Login/__loginButton_click()[D:\dev\nexxus\metasoft\iGallery;components;Login. mxml:102]
at [mouseEvent]
regards,
Shah Mohamed.N

Are the read and write operations atomic for an array in a local variable.

Hi,
I would like to know when you access an array in a local variable, is it an atomic operation?
Thanks,
Mat

Thanks for the comments. I agree with you. However, I my case, race conditions and synchronization are not issues. Therefore, the only thing that matters to me is that the write and read operation of the array must be atomic. I know that I can implement that with a LV2 style global but I want to avoid it if possible.
If writing and reading to an array are atomic operations then I can simply use local or global variables.
All I need to know is: Is reading or writing an array in a local variable an atomic operation?
Thanks,
Mat

Observing ORA-00028 during read and write operations

In toplink connection pool, if a connection becomes stale, does Toplink try to re-connect or throw an exception? Under what circumstances we could see this error?
Thanks,
Exception [TOPLINK-4002] (Oracle TopLink - 11g Release 1 (11.1.1.3.0) (Build 100323)): oracle.toplink.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: ORA-00028: your session has been killed
Error Code: 28
Call: UPDATE IdcUser SET lastLogout = ?, version = ?, modifiedDate = ? WHERE ((id = ?) AND (version = ?))
bind => [2011-01-27 02:52:17.0, 91, 2011-01-27 02:52:17.447, 1024077, 90]
Query: UpdateObjectQuery(User Kislay)
at oracle.toplink.exceptions.DatabaseException.sqlException(DatabaseException.java:305)
at oracle.toplink.internal.databaseaccess.DatabaseAccessor.processExceptionForCommError(DatabaseAccessor.java:1328)
at oracle.toplink.internal.databaseaccess.DatabaseAccessor.executeDirectNoSelect(DatabaseAccessor.java:722)
at oracle.toplink.internal.databaseaccess.DatabaseAccessor.executeNoSelect(DatabaseAccessor.java:790)
at oracle.toplink.internal.databaseaccess.DatabaseAccessor.basicExecuteCall(DatabaseAccessor.java:524)
at oracle.toplink.internal.databaseaccess.DatabaseAccessor.executeCall(DatabaseAccessor.java:467)
at oracle.toplink.internal.sessions.AbstractSession.executeCall(AbstractSession.java:800)
at oracle.toplink.internal.queryframework.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:193)
at oracle.toplink.internal.queryframework.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:179)
at oracle.toplink.internal.queryframework.DatasourceCallQueryMechanism.updateObject(DatasourceCallQueryMechanism.java:670)
at oracle.toplink.internal.queryframework.StatementQueryMechanism.updateObject(StatementQueryMechanism.java:421)
at oracle.toplink.internal.queryframework.DatabaseQueryMechanism.updateObjectForWriteWithChangeSet(DatabaseQueryMechanism.java:1131)
at oracle.toplink.queryframework.UpdateObjectQuery.executeCommitWithChangeSet(UpdateObjectQuery.java:69)
at oracle.toplink.internal.queryframework.DatabaseQueryMechanism.executeWriteWithChangeSet(DatabaseQueryMechanism.java:279)
at oracle.toplink.queryframework.WriteObjectQuery.executeDatabaseQuery(WriteObjectQuery.java:47)
at oracle.toplink.queryframework.DatabaseQuery.execute(DatabaseQuery.java:674)
at oracle.toplink.queryframework.DatabaseQuery.executeInUnitOfWork(DatabaseQuery.java:597)
at oracle.toplink.queryframework.ObjectLevelModifyQuery.executeInUnitOfWorkObjectLevelModifyQuery(ObjectLevelModifyQuery.java:103)
at oracle.toplink.queryframework.ObjectLevelModifyQuery.executeInUnitOfWork(ObjectLevelModifyQuery.java:75)
at oracle.toplink.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2753)
at oracle.toplink.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1079)
at oracle.toplink.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1063)
at oracle.toplink.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1022)
at oracle.toplink.internal.sessions.CommitManager.commitChangedObjectsForClassWithChangeSet(CommitManager.java:288)
at oracle.toplink.internal.sessions.CommitManager.commitAllObjectsWithChangeSet(CommitManager.java:167)
at oracle.toplink.internal.sessions.AbstractSession.writeAllObjectsWithChangeSet(AbstractSession.java:3459)
at oracle.toplink.internal.sessions.UnitOfWorkImpl.commitToDatabase(UnitOfWorkImpl.java:1327)
at oracle.toplink.internal.sessions.UnitOfWorkImpl.commitToDatabaseWithChangeSet(UnitOfWorkImpl.java:1423)
at oracle.toplink.internal.sessions.UnitOfWorkImpl.commitRootUnitOfWork(UnitOfWorkImpl.java:1169)
at oracle.toplink.internal.sessions.UnitOfWorkImpl.commit(UnitOfWorkImpl.java:941)
at com.integral.session.ejb.UserServiceManager.setUserLogoutTime(UserServiceManager.java:1199)
at com.integral.session.ejb.UserServiceManager$WebUser.invalidateAndRemoveSession(UserServiceManager.java:812)
at com.integral.session.ejb.UserServiceManager$WebUser.invalidateAndRemoveSession(UserServiceManager.java:745)
at com.integral.session.ejb.UserServiceManager.removeUserSession(UserServiceManager.java:257)
at com.integral.apps.session.IdcHttpSessionListener.sessionDestroyed(IdcHttpSessionListener.java:83)
at org.apache.catalina.session.StandardSession.expire(StandardSession.java:687)
at org.apache.catalina.session.StandardSession.isValid(StandardSession.java:579)
at org.apache.catalina.session.ManagerBase.processExpires(ManagerBase.java:678)
at org.apache.catalina.session.ManagerBase.backgroundProcess(ManagerBase.java:663)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1284)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1569)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1578)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1578)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1558)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.sql.SQLException: ORA-00028: your session has been killed
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:125)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:316)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:282)
at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:639)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:185)
at oracle.jdbc.driver.T4CPreparedStatement.execute_for_rows(T4CPreparedStatement.java:633)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1086)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:2984)
at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:3057)
at oracle.toplink.internal.databaseaccess.DatabaseAccessor.executeDirectNoSelect(DatabaseAccessor.java:715)

The error seems to indicate that the connection has been killed by the server, perhaps due to a timeout.
In the latest EclipseLink version shipped with TopLink, dead connections in the EclipseLink connection pool should be automatically reconnected.
Your error indicates you are not using the latest EclipseLink version, but the obsolete toplink.jar shipped with 11g.
To get dead connection handling you may need to upgrade to using the eclipselink.jar.
James : http://www.eclipselink.org

Problem with air read and write smb shared directory of file

hi, everyone.
I'm want to access smb directory of file,And to read and
write operation, I would like to ask how I should do?
Thanks!

You can't access any OS facility nor execute arbitrary command.
So the best solution is to mount samba directory BEFORE run your AIR application; you eventually can create a script that mount samba (and asks password) and then run you AIR application.
see
http://www.mikechambers.com/blog/2008/01/17/commandproxy-net-air-integration-proof-of-conc ept/
for a more complex solution.

Multithreaded problem in read and write thread

This is a producer consumer problem in a multi-threaded environment.
Assume that i have multiple consumer (Multiple read threads) and a
single producer(write thread).
I have a common data structure (say an int variable), being read and written into.
The write to the data sturcture happens occasionally (say at every 2 secs) but read happens contineously.
Since the read operation is contineous and done by multiple threads, making the read method synchronized will add
overhead(i.e read operation by one thread should not block the other read threads). But when ever write happens by
the write thread, that time the read operations should not be allowed.
Any ideas how to achive this ??

If all you're doing is reading an int, then just use regular Java synchronization. You'll actually get a performance hit if you're doing simple read operations, as stated in the ReadWriteLock documentation:
Whether or not a read-write lock will improve performance over the use of a mutual exclusion lock depends on the frequency that the data is read compared to being modified, the duration of the read and write operations, and the contention for the data - that is, the number of threads that will try to read or write the data at the same time. For example, a collection that is initially populated with data and thereafter infrequently modified, while being frequently searched (such as a directory of some kind) is an ideal candidate for the use of a read-write lock. However, if updates become frequent then the data spends most of its time being exclusively locked and there is little, if any increase in concurrency. Further, if the read operations are too short the overhead of the read-write lock implementation (which is inherently more complex than a mutual exclusion lock) can dominate the execution cost, particularly as many read-write lock implementations still serialize all threads through a small section of code. Ultimately, only profiling and measurement will establish whether the use of a read-write lock is suitable for your application.

I cannot update from OS 10.9.4 to 10.9.5. I get a message saying: File couldn't be installed error (513). I have configured my OS so that I have read and write permission followed by system with read and writ permission. Can someone help me? Thanks.

I cannot update from OS X 10.9.4 t0 10.9.5> Whenever I try I get the following message: File couldn't be installed error (513) and something about not having the proper permission. Under the Macintosh HD sharing and permissions settings I have customized the settings so that (Me) has read and write permission followed by the system with read and write permission, wheel and everyone have Read permissions.
I have no problems updating apps such as Adobe CC or iTunes but cannot update the operating system, can someone help me? Thanks.

1. Restart the computer in safe mode. Certain caches maintained by the system will be rebuilt.
Safe mode is much slower to start up than normal. The next normal startup may also be somewhat slow.
When the login screen appears, restart as usual (not in safe mode) and test. There's no need to log in while in safe mode.
Note: If FileVault is enabled, or if a firmware password is set, or if the startup volume is a software RAID, you can’t start in safe mode. In that case, go to Step 2.
If there's no change after taking this step, continue.
2. Back up all data before proceeding.
Triple-click anywhere in the line below on this page to select it:
/var/folders
Right-click or control-click the highlighted line and select
Services ▹ Reveal in Finder (or just Reveal)
from the contextual menu.* A folder should open with an item named "folders" selected. Move the selected item to the Trash. You may be prompted for your administrator login password. Restart the computer and empty the Trash.
*If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combination command-C. In the Finder, select
Go ▹ Go to Folder...
from the menu bar and paste into the box that opens by pressing command-V. You won't see what you pasted because a line break is included. Press return.

I have an external hard drive, from Iomega. However, I cannot copy or save any file to it. On my PC it says that is possible to read and write in it, but in my Mac, it says I can only read. can somebody help me?

I have an external hard drive, from Iomega. that I can open and see my files. However, I cannot copy or save any file to it. On my PC I have it says that is possible to read and write in it, but in my Mac, it says I can only read. can somebody help me?
Also, Im a photographer, so I like to name a lot of files at the same time (used to do in on PC and it was very usefull.) cannot find out how to do it on my Mac. Really appretiate if some one can give me a solution! Thanx

Your drive is formatted with the NTFS file system. OS X can read but not write to the NTFS file system. There are third party drivers available that claim to add the ability to OS X to write to an NTFS partition. I have not tried them and don't know if they work.
The only file system that OS X and Windows can both write to natively is the FAT32 file system.

Read and write excel sheet data from uploded file in sharepoint site programmatically 2013

hi team,
I am working on sharepoint 2013.I want to read and write data in excel sheet (micrsoft excel) from stored file in shrepoint docoumnt library .please suggest me
vijay

Hi
Vijay,
check those links
http://www.sharepointwithattitude.com/archives/61
https://social.technet.microsoft.com/Forums/en-US/e760051b-a92f-473c-9ec9-0f0c36c99e40/read-and-write-excel-sheet-data-from-uploded-file-in-sharepoint-site-programmatically-2013?forum=sharepointdevelopment
Kind Regards, John Naguib Technical Consultant/Architect MCITP, MCPD, MCTS, MCT, TOGAF 9 Foundation. Please remember to mark the reply as answer if it helps.

How do I read and write to text files on a remote computer's hard drive

I would like to read and write data to a text file on a remote computer. This is easily accomplished using one of the file functions such as "write characters to file.vi". If I am already connected to the remote computer, all I need to do is specify the path to the particular file and it will work fine.
My problem is that I want to connect to the remote computer programatically within LabVIEW (I do not want to have to use the computer's OS to establish the connection. Is there a function that I can use to do this?
Thomas D. Schaefer
Wells Manufacturing Corp

Yariv,
You should really start a new thread with a new question like this, so that more people see it. Some people look primarily at threads that have no responses yet. Also, don't post the exact same question in multiple places. Or, if you must cross-post to some other forum, make sure to mention it in your question text.
I'm happy to be a brick in your Western Wall, but I'm not sure what the main objective is here. Is the main problem really getting access to the "X bytes received in Y seconds at Z bytes/sec" string? Or is it accomplishing the file transfer? And what OS and LabVIEW version are you running?
I think your problem is that you the LabVIEW System Exec command does not allow for the degree of interactivity that you need if you want to issue a sequence of commands to a command-line executable. However, under Windows XP (and, presumably, other Windows versions, though I can't check), you can tell the FTP executable to use commands from a textfile script by using the -s switch, and you can override the prompts during multiple file transfers with the -i switch:
ftp -i -s:FILEPATH SERVERNAME
If you issue a command in this format to System Exec, and make sure to create a file at FILEPATH with your command sequence (one per line), then you should at least accomplish the FTP actions. This won't give you the transfer details in the standard output, unfortunately. However, if you just want a general sense of how much was transferred and how quickly it happened, you can code that in LabVIEW by getting the resulting file sizes and using Tick Count before and after the System Exec call to see how long the transfer took.
Hope that helps,
John

How to read and write a string into a txt.file

Hi, I am now using BEA Workshop for Weblogic Platform version10. I am using J2EE is my programming language. The problem I encounter is as the above title; how to read and write a string into a txt.file with a specific root directory? Do you have any sample codes to reference?
I hope someone can answer my question as soon as possible
Thank you very much.

Accessing the file system directly from a web app is a bad idea for several reasons. See http://weblogs.java.net/blog/simongbrown/archive/2003/10/file_access_in.html for a great discussion of the topic.
On Weblogic there seems to be two ways to access files. First, use a File T3 connector from the console. Second, use java.net.URL with the file: protocol. The T3File object has been deprecated and suggests:
Deprecated in WebLogic Server 6.1. Use java.net.URL.openConnection() instead.
Edited by: m0smith on Mar 12, 2008 5:18 PM

I have the latest Mac Air 13" and I have a Seagate 500MB external hard disk I cant copy or Cut any files on the hard disk and I cant even delete any files. I have the settings as Read and Write in the get info tab. Please help

I have the latest Mac Air 13" and I have a Seagate 500MB external hard disk I cant copy or Cut any files on the hard disk and I cant even delete any files. I have the settings as Read and Write in the get info tab. Please helpand also note that my hard drive was formatted on a Windows 7 Laptop.

thats the problem, its in MSDos (Fat) or NTFS for Windows.
Options.....
1. offload all that data on the HD onto your PC, THEN format the HD in EXFAT for use on BOTH PC and Mac for read/write.....then reload all (or as you need) that data back onto the HD
2. get another HD, and format it for Mac OSX extended journaled.
FAT32 (File Allocation Table)
Read/Write FAT32 from both native Windows and native Mac OS X.
Maximum file size: 4GB.
Maximum volume size: 2TB
You can use this format if you share the drive between Mac OS X and Windows computers and have no files larger than 4GB.
NTFS (Windows NT File System)
Read/Write NTFS from native Windows.
Read only NTFS from native Mac OS X
To Read/Write/Format NTFS from Mac OS X, here are some alternatives:
For Mac OS X 10.4 or later (32 or 64-bit), install Paragon (approx $20) (Best Choice for Lion)
Native NTFS support can be enabled in Snow Leopard and Lion, but is not advisable, due to instability.
AirPort Extreme (802.11n) and Time Capsule do not support NTFS
Maximum file size: 16 TB
Maximum volume size: 256TB
You can use this format if you routinely share a drive with multiple Windows systems.
HFS+ ((((MAC FORMAT))) (Hierarchical File System, a.k.a. Mac OS Extended (Journaled) Don't use case-sensitive)
Read/Write HFS+ from native Mac OS X
Required for Time Machine or Carbon Copy Cloner or SuperDuper! backups of Mac internal hard drive.
To Read HFS+ (but not Write) from Windows, Install HFSExplorer
Maximum file size: 8EiB
Maximum volume size: 8EiB
You can use this format if you only use the drive with Mac OS X, or use it for backups of your Mac OS X internal drive, or if you only share it with one Windows PC (with MacDrive installed on the PC)
EXFAT (FAT64) ------Can read/write from both PC and Mac
Supported in Mac OS X only in 10.6.5 or later.
Not all Windows versions support exFAT.
exFAT (Extended File Allocation Table)
AirPort Extreme (802.11n) and Time Capsule do not support exFAT
Maximum file size: 16 EiB
Maximum volume size: 64 ZiB
You can use this format if it is supported by all computers with which you intend to share the drive. See "disadvantages" for details.

File read and write operations

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