Read and write speeds of PCI-E SSD 256GB

What are the read and write speeds exceeded with a 2014 Mac Mini with the 256GB PCI-E SSD from Apple? Thanks.
PS: I was thinking about getting the 2014 Mac Mini with these specs at $899.99:
2.6GHz Dual-Core Intel Core i5 (Turbo Boost up to 3.1GHz)
8GB 1600MHz LPDDR3 SDRAM
256GB PCIe-based Flash Storage
Intel Iris Graphics
User's Guide (English)
Accessory Kit

8 to 9 hundre MB/s for the PCIe SSDs vs 500 MB/s for a starndard SSD

Similar Messages

How to increase disk read and write speed after installing new SSD (2009 Macbook Pro)? Why not as fast as advertised?

Hi everyone,
I just installed a Crucial MX10512 GB SSD into my 2009 Macbook Pro. It's definitely much faster, but the read and write disk speed is around 200 Mb/s for both versus the 300-500 Mb/s that the SSD advertised. Any ideas as to why? And is there anything I can do to make it faster? Before I installed it, it was between 80-90 Mb/s.
Specs:
- currently have about 460 of 511 GB of storage available
- am using 2GB of memory
- running on 10.10.2 Yosemite
Thanks!

nataliemint wrote:
Drew, forgive me for being so computer-incompetent but how would I boot from another OS? And shouldn't I be checking the read speeds on my current OS (Yosemite) anyways because I want to know how the SSD is performing on the OS I use? And finally, what kind of resources would it be using that would be slowing down my SSD?
Sorry for all the questions - I'm not a Macbook wiz by any means!
You could make a clone of your internal OS onto an external disk. Hopefully you already have a backup of some form
A clone is a full copy, so you can boot from it. It makes a good backup as well as being useful to test things like this.
Carbon Copy Cloner will make one or you can use Disk Utility to 'restore' your OS from the internal disk to an external one.
Ideally the external disk is a fast disk with a fast 'interface' like Thunderbolt, Firewire 800 or USB3. USB2 can work, but it is slow & may effect the test.
You connect the clone, hold alt at startup & select the external disk in the 'boot manager'. When the Mac is finished booting run the speed tester.
Maybe this one…
https://itunes.apple.com/gb/app/blackmagic-disk-speed-test/id425264550
Test the internal & compare to the previous tests
A running OS will do the following on it's boot disk…
Write/ read cache files from running apps
Write/ read memory to disk if memory is running low
Index new files if content is changing or being updated
Copy files for backing up (Time Machine or any other scheduled tasks)
Networking can also trigger read/ write on the disk too.
You may not have much activity that effects a disk speed test, but you can't really be sure unless that disk is not being used for other tasks.
Disk testing is an art & science in itself, see this if you want to get an idea …
http://macperformanceguide.com/topics/topic-Storage.html
Simply knowing that it's about twice the speed would be enough to cheer me up

Reads and Write Speed

Hello guys
I have a question. I bought the Refurnished Mac Book Pro Retina 13.3 inch(Mid 2014) basic model(8GB memory, 2.6GHz CPU, 128GB SSD)
And Since I did buy from the refurnished, I am pretty suspicious about the performace. So I used the benchmark test and Read and Write speed test(Black magic speed test). Benchmark test was about average to most of the same Macbook pro users, but the read and write speed was pretty slower than any other. It was about 220 MB/S for Write and 560MB/S for Read. It that means something wrong with my Macbook?
Thank you very much for your reading all of this

Hi Ralphael,
I was thinking of buying the WD MyCloud box and your words of wisedom inspired me to take a risk, getting one of these for myself. It's always a gamble buying new technology bits and hoping it will do, what you expect it to do.
First thing I did was connect the WD MyCloud to my network (entrirely 1 Gb network capable ports - including router).I updated the firmware to the latest via the network connection, which was reasonably quick to update.
Everything worked perfectly, straight from go, the 3 Tb of data I had on my former Seagate GoFlex (manually connected to a SATA port on my P.C) only took a few hours to completely copy across. I tried transferring the wholelot across via the Seagate GoFlex 100mB/s ethernet port, but that was horrendously slow.
I loved the way I could get access to this device, via the internet, (wd2go.com) to the files stored on my WD MyCloud (at home). It indeed acted as a "Cloud" device for me as I could map the connection to a network drive on my P.C and then
copy files across to my P.C (wherever I am) - Just drag and drop from explorer and it's pretty quick to transfer across as well.
I just wanted to say this box is fanatastic and I am very happy with it. I know there have been a few critics out therewho haven't had good things to say, but I think they need to make sure everything fits the criteria for successful results,
which this device is well capable of producing. I had the experience of using a Seagate GoFlex device and that took a while before I got things working reasonably
well for me. It's good to have a device that now well exceeds the capability of this former device.
Very happy with this WD MyCloud and my experiences with it.
Added Kudos for your article.
Cheers
Patrick

Why is my SSD showing 250mb/s difference between read and write...

So i have recently upgraded to a SSD in my 2011 MBP. 2.4Ghz i5 16Gb RAM. I swapped my HDD with a Samsung 840 Series 250Gb SSD, I noticed a huge speed bump. See attached photos. Read is clocked at 503MB/s peak, and Write is clocked at 260MB/s peak on the SSD. My Question is why is there a 250MB/s difference between read and write?? Using Black Magic Disk Speed test. Mac OS X 10.8.4 Beta.
Thanks

Writes are performed very differently on SSD than they do on a hard drive, and it is common for SSDs to have lower write speeds than reads.
It's actually quite interesting if you're a geek: http://en.wikipedia.org/wiki/Write_amplification
As long as the speeds do match your manufacturer specification for the model (and they do: http://www.samsung.com/us/computer/memory-storage/MZ-7TD250BW ) , there is nothing to be concerned about.

Can you improve the speed of my CSV Reader and Writer?

hi all, i'm trying to develop a CSV Writer and Reader. i have done a good work to implement the special character and quoting it, it's also support multi line value but it's incredibly slow.
can someone help to make it faster?
here it's how to use the writer
char *stringhe_sorgenti[10] = {0};
out = OpenFile(nfile, VAL_WRITE_ONLY, VAL_TRUNCATE, VAL_ASCII);
for(i = 0; i < sizeof(stringhe_sorgenti)/sizeof(char*); i++){
stringhe_sorgenti[i] = (char*)calloc(200, sizeof(char));
sprintf(stringhe_sorgenti[0], "example1");
sprintf(stringhe_sorgenti[1], "example2");
scrivi_riga_csv(out, stringhe_sorgenti, sizeof(stringhe_sorgenti)/sizeof(char*), formato);
for(i = 0; i < sizeof(stringhe_sorgenti)/sizeof(char*); i++){
free(stringhe_sorgenti[i]);
CloseFile(out);
here is the writer
void scrivi_riga_csv(int file_handle, char *stringa_sorgente[], int numero_stringhe, int formato)
char delimitatore[2][2] = {{',', '\0'}, {';', '\0'}};
char stringa_destinazione[1024] = {0};
int index_destinazione = {0};
int index_start = {0};
int index_fine = {0};
int errore = {0};
int i = {0};
//int k = {0};
size_t lunghezza_stringa = {0};
for(i = 0; i < numero_stringhe; i++){
if(i != 0){
stringa_destinazione[index_destinazione++] = delimitatore[formato][0];
index_start = 0;
lunghezza_stringa = strlen(stringa_sorgente[i]);
// se la stringa sorgente
if( (FindPattern(stringa_sorgente[i], 0, lunghezza_stringa, delimitatore[formato], 0, 0) != -1) // contiene delimitatore
|| (FindPattern(stringa_sorgente[i], 0, lunghezza_stringa, "\"", 0, 0) != -1) // contiene parentesi
|| (FindPattern(stringa_sorgente[i], 0, lunghezza_stringa, "\n", 0, 0) != -1) // contiene a capo
// apro parentesi all'inizio
stringa_destinazione[index_destinazione++] = '"';
// metodo find pattern, piu' complesso ma piu' performante
do{ index_fine = FindPattern(stringa_sorgente[i], index_start, lunghezza_stringa - index_start, "\"", 0, 0);
if(index_fine != -1){
index_fine++;
// copio dall'inizio fino alle virgolette
CopyString (stringa_destinazione, index_destinazione, stringa_sorgente[i], index_start, index_fine - index_start);
index_destinazione += index_fine - index_start;
// ne aggiungo una dopo
stringa_destinazione[index_destinazione++] = '"';
// aggiorno la posizione di start e riparto con il while
index_start = index_fine;
}while(index_fine != -1);
CopyString (stringa_destinazione, index_destinazione, stringa_sorgente[i], index_start, lunghezza_stringa - index_start);
index_destinazione += strlen(stringa_sorgente[i]) - index_start;
// alla fine della riga chiudo la parentesi
stringa_destinazione[index_destinazione++] = '"';
else{
// altrimenti la copio semplicemente e shifto l'indice della stringa di destinazione
CopyString (stringa_destinazione, index_destinazione, stringa_sorgente[i], 0, lunghezza_stringa);
index_destinazione += strlen(stringa_sorgente[i]);
memset(stringa_sorgente[i], 0, strlen(stringa_sorgente[i]));
errore = WriteLine (file_handle, stringa_destinazione, strlen(stringa_destinazione));
if(errore == -1){
errore = GetFmtIOError();
MessagePopup("WriteLine -> WriteLine", GetFmtIOErrorString(errore));
return;
here how to read the file
char *stringhe_sorgenti[10] = {0};
for(i = 0; i < sizeof(stringhe_sorgenti)/sizeof(char*); i++){
stringhe_sorgenti[i] = (char*)calloc(200, sizeof(char));
out = OpenFile(nomearchivio, VAL_READ_ONLY, VAL_OPEN_AS_IS, VAL_BINARY);
leggi_riga_csv(out, stringhe_sorgenti, sizeof(stringhe_sorgenti)/sizeof(char*), formato);
strcpy(intestazione.data, stringhe_sorgenti[1]);
for(i = 0; i < sizeof(stringhe_sorgenti)/sizeof(char*); i++){
free(stringhe_sorgenti[i]);
CloseFile(out);
and here the reader
void leggi_riga_csv(int file_handle, char *stringa_destinazione[], int numero_stringhe, int formato)
char delimitatore[2][2] = {{',', '\0'},
{';', '\0'}};
char stringa_sorgente[1024] = {0};
int stringa_in_corso = {0};
int index_inizio_valore = {0};
int index_doublequote = {0};
int offset_stringa_destinazione = {0};
size_t lunghezza_stringa = {0};
int inquote = {0};
int errore = {0};
int i = {0};
for(i = 0; i < numero_stringhe; i++){
lunghezza_stringa = strlen(stringa_destinazione[i]);
memset(stringa_destinazione[i], 0, lunghezza_stringa);
do{ memset(&stringa_sorgente, 0, sizeof(stringa_sorgente));
errore = ReadLine(file_handle, stringa_sorgente, sizeof(stringa_sorgente) - 1);
// If ReadLine reads no bytes because it has already reached the end of the file, it returns –2.
// If an I/O error occurs, possibly because of a bad file handle, ReadLine returns –1.
// You can use GetFmtIOError to get more information about the type of error that occurred.
// A value of 0 indicates that ReadLine read an empty line.
if(errore == -1){
errore = GetFmtIOError();
MessagePopup("leggi_riga_csv -> ReadLine", GetFmtIOErrorString(errore));
return;
else if(errore == -2){
errore = GetFmtIOError();
MessagePopup("leggi_riga_csv -> ReadLine", "already reached the end of the file");
return;
else{
lunghezza_stringa = errore;
index_inizio_valore = 0;
// metodo find pattern, piu' complesso ma piu' performante
for(i = 0; i <= lunghezza_stringa; i++){
// se come primo carattere ho una " allora e' una stringa speciale
if(inquote == 0){
if(stringa_sorgente[i] == '\"'){
inquote = 1;
index_inizio_valore = ++i;
else{
// altrimenti cerco il delimitatore senza il ciclo for
i = FindPattern(stringa_sorgente, i, lunghezza_stringa - index_inizio_valore, delimitatore[formato], 0, 0);
if(i == -1){
// se non lo trovo ho finito la riga
i = lunghezza_stringa;
if(stringa_sorgente[i - 1] == '\r'){
i--;
if(stringa_in_corso < numero_stringhe){
CopyString (stringa_destinazione[stringa_in_corso], 0, stringa_sorgente, index_inizio_valore, i - index_inizio_valore);
offset_stringa_destinazione = 0;
stringa_in_corso++;
if(stringa_sorgente[i] == '\r'){
i++;
index_inizio_valore = i + 1;
if(inquote == 1){
// se sono nelle parentesi cerco le virgolette
i = 1 + FindPattern(stringa_sorgente, i, lunghezza_stringa - index_inizio_valore, "\"", 0, 0);
if(i == 0){
if(stringa_sorgente[lunghezza_stringa - 1] == '\r'){
lunghezza_stringa--;
// se non le trovo ho finito la riga, esco dal ciclo for
break;
// se incontro una doppia parentesi salto avanti
else if(stringa_sorgente[i] == '\"'){
continue;
// !!!! fondamentale non cambiare l'ordine di questi else if !!!!!
// se incontro una parentesi seguita dal delimitatore
// o se incontro una parentesi seguita dal terminatore
// \r = CR = 0x0D = 13
// \n = LF = 0x0A = 10
// a capo = CR + LF
else if( (stringa_sorgente[i] == delimitatore[formato][0])
|| (stringa_sorgente[i] == '\r')
|| (stringa_sorgente[i] == '\0')
// salvo il valore
inquote = 0;
if(stringa_in_corso < numero_stringhe){
CopyString (stringa_destinazione[stringa_in_corso], offset_stringa_destinazione, stringa_sorgente, index_inizio_valore, i - 1 - index_inizio_valore);
offset_stringa_destinazione = 0;
stringa_in_corso++;
if(stringa_sorgente[i] == '\r'){
i++;
index_inizio_valore = i;
// se sono andato a capo scrivo fino a dove sono e poi procedo con la nuova riga
if(inquote){
if(stringa_in_corso < numero_stringhe){
CopyString (stringa_destinazione[stringa_in_corso], offset_stringa_destinazione, stringa_sorgente, index_inizio_valore, lunghezza_stringa - index_inizio_valore);
strcat(stringa_destinazione[stringa_in_corso], "\n");
offset_stringa_destinazione += lunghezza_stringa - index_inizio_valore;
offset_stringa_destinazione++;
}while(inquote == 1);
// elimino le doppie parentesi
for(i = 0; i < numero_stringhe; i++){
index_doublequote = 0;
do{ lunghezza_stringa = strlen(stringa_destinazione[i]);
index_doublequote = FindPattern(stringa_destinazione[i], index_doublequote, lunghezza_stringa - index_doublequote, "\"\"", 0, 0); // contiene doppia parentesi
if(index_doublequote != -1){
index_doublequote++;
memmove (stringa_destinazione[i] + index_doublequote, stringa_destinazione[i] + index_doublequote + 1, lunghezza_stringa - index_doublequote);
}while(index_doublequote != -1);
return;

the format is CSV, i try to explain better what i'm doing.
our client asked to save acquisition data with header description in an excel readable format, i've decided to use .CSV and not .TDM because it's a simple txt file and we never used .TMD but i will propose to use it.
after some research on the internet i've found nothing to handle .CSV in CVI except from this csv_parse but i've found it difficult to be maintained so i've write it by my own hand.
i've written two example of how to use my function to read or write and i've copyed my function used to read and write.
in the write function i check with FindPattern if the string to be write contain some special character, if i find this i have to quote the string to respect the standard RFC4180 and if i find a quote i have to double it. aftere i've done this check i write the line in the file.
in the read function, that is more complicated, i:
check if the first character is a quote.
if it's not i copy the string until the delimitier or until the end of the line.
if it is i have a string with special character inside so:
i find the first quote in the string. when i've found i check if it's follwed by another quote. this means that in the starting message i was writing a single quote.
if it's not followed by another quote but it's followed by a delimiter or a carriage return i've finished the special line.
if i don't find it it means that the special quote have a carriage return inside and i have to check the next line. before checking the next line i save this in my string.
after this loop i check in every string if i have a double quote and i delete one.
the main problem is in the speed of this, i'm acquiring data at 1000 S/s with 8 active channel for 60 second so i have 480000 data to be stored, divided in 60.000 row and 8 column. to read a file like that my pc stay "locked" for 15 second or more.
i've tried to use the arraytofile function and it's extremly fast and i can also put header because the function can start from the last position in the file but the filetoarray function start from the beginning and i cannot read the header correctly. also if i'm using the european CSV with semicolon as delimiter with arraytofile i cannot select the semicolon but only the coma

PCIe-6536 Simultaneous Read and Write

I have an application where I need to simultaneously read 24 bits (Ports 0-2) and write 8 bits (Port 3), using an external clock. The way it is done now is I create a read task and I create a write task. I send my external clock to PFI4 and PFI5, because two clock inputs are required (one for read, one for write). And I send a trigger signal to PFI3 to start and synchronize the tasks.
However it is not working correctly. My clock is ~15MHz and the reads and writes are off by a random number of a few clock cycles. For example when I start writing out Port 3, the reading into Ports 0-2 will start 2 or 3 or 4 clock cycles later.
Is there a way that I can read and write simultaneously that will work correctly??

I am still trying to figure out this problem. I want to simultaneously write bytes out of Port_3 and acquire 24 bit words into Ports 0-2. The only way I know to synchronize the tasks is to have them both start on a rising edge trigger signal on PFI3.
If my clock is a few hundred kilohertz, the tasks are synchonized. When the clock is over 1 MHz then I start seeing the read of 24-bit words lagging the output write by 1 clock cycle sometimes. The higher the clock rate, the more delay I see. With a 20MHz clock I see a lag of 8 or 9 or 10 clock cycles. I spent a lot of money on this card but it apparently doesn't work as advertised. It is supposed to work up to 25MHz but I have problems at 1MHz.
The way I am testing it is to loop Port_3 directly into Port_2 with a short ribbon cable (using the CB-2162 test board made for the I/O card). I can send a pattern out and read it in and see how many of the first bytes were not read in. For some reason the Acquire task is lagging the Generate task...

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

(MHDDK) How to realize the synchronization of read and write for long time by cart PCI6025E

I've finished the programming of the process read and write for the PCI6025E, I can read and write the data now, I wanna synchronize both of the processes, writing the data into the card just after the reading from the card, and check the wave in the oscilloscope. when I use the SEC , it works, but when I changed to MSEC, the wave only come out for a few seconds, even if I bloc 60sec, and also the wave is not steady. why?
so now the problem is how could I write the data immediately which just read and it's for a long time I asked?
Thanks in advance!

Hi Jack,
aiex4.cpp doesn't exist, as far as I can tell. I believe that while the examples were being named, the developer mis-numbered them and just skipped 4 :-S
At any rate, if you already have AI and AO working separately, and you have the I/O performance you application requires, then you may not need to add DMA to your driver. However, if you want to add DMA, it won't be very difficult. In essence, you would need mix code from the S and M Series examples. The S Series example aiex2.cpp shows two things: the few lines of code you need to add DMA objects (lines 70-78), and how to program the STC to use DMA (line 114). And aiex3.cpp from the M Series examples gives a clearer picture of how to control and read the DMA channel.
Thanks, Rolf, for your time and help :-) I'm grateful for your contributions, and I'm glad to see active developers in the DDK forum.
Joe Friedchicken
NI VirtualBench Application Software
Get with your fellow hardware users :: [ NI's VirtualBench User Group ]
Get with your fellow OS users :: [ NI's Linux User Group ] [ NI's OS X User Group ]
Get with your fellow developers :: [ NI's DAQmx Base User Group ] [ NI's DDK User Group ]
Senior Software Engineer :: Multifunction Instruments Applications Group
Software Engineer :: Measurements RLP Group (until Mar 2014)
Applications Engineer :: High Speed Product Group (until Sep 2008)

In iCal and Notifications on a notebook, is it possible to expand the notes window to make it easier to read and write notes?

In iCal and Notifications on a notebook, is it possible to expand the notes window to make it easier to read and write notes? In the past, I have used Outlook calendar and tasks and I was able to expand the windows which allowed me to put a great amount of details into either the notes section in events and tasks. It would be great to be able to do this in iCal and Notifications as well. I am using a Macbook Pro with OS X 10.8. Thank you very much for assistance with this.

HI,
Try Spaces for a virtual desktop.
http://www.ehow.com/how2189851use-spaces-mac-os-x.html
Carolyn

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.

Mac desktop. 10.6.8. Text edit. Not locked. Read and write. Still, documents are locking when they are moved from desktop to another folder on the server. Techies can't figure it out here. What am I not doing?

Mac desktop. 10.6.8. Text edit. Not locked. Read and write, not read only. Documents are locking when they are moved from desktop to another folder or saved directly into that folder on the server. Not happening with anyone else but me and the boss's computer so has to be in the properties for my text edit software. Techies can't figure it out after trying for two weeks. Boss can do a cut and paste and put into a new document, but that's starting to become a problem.

Mac desktop. 10.6.8. Text edit. Not locked. Read and write, not read only. Documents are locking when they are moved from desktop to another folder or saved directly into that folder on the server. Not happening with anyone else but me and the boss's computer so has to be in the properties for my text edit software. Techies can't figure it out after trying for two weeks. Boss can do a cut and paste and put into a new document, but that's starting to become a problem.

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.

Need help to read and write using UTF-16LE

Hello,
I am in need of yr help.
In my application i am using UTF-16LE to export and import the data when i am doing immediate.
And sometimes i need to do the import in an scheduled formate..i.e the export and imort will happend in the specified time.
But in my application when i am doing scheduled import, they used the URL class to build the URL for that file and copy the data to one temp file to do the event later.
The importing file is in UTF-16LE formate and i need to write the code for that encoding formate.
The problem is when i am doing scheduled import i need to copy the data of the file into one temp place and they doing the import.
When copying the data from one file to the temp i cant use the UTF-16LE encoding into the URL .And if i get the path from the URl and creating the reader and writer its giving the FileNotFound exception.
Here is the excisting code,
protected void copyFile(String rootURL, String fileName) {
URL url = null;
try {
url = new URL(rootURL);
} catch(java.net.MalformedURLException ex) {
if(url != null) {
BufferedWriter out = null;
BufferedReader in = null;
try {
out = new BufferedWriter(new FileWriter(fileName));
in = new BufferedReader(new InputStreamReader(url.openStream()));
String line;
do {
line = in.readLine();
if(line != null) {
out.write(line, 0, line.length());
out.newLine();
} while(line != null);
in.close();
out.close();
} catch(Exception ex) {
Here String rootURL is the real file name from where i have to get the data and its UTF-16LE formate.And String fileName is the tem filename and it logical one.
I think i tried to describe the problem.
Plz anyone help me.
Thanks in advance.

Hello,
thanks for yr reply...
I did the as per yr words using StreamWriter but the problem is i need a temp file name to create writer to write into that.
but its an logical one and its not in real so if i create Streamwriten in that its through FileNotFound exception.
The only problem is the existing code build using URL and i can change all the lines and its very difficult because its vast amount of data.
Is anyother way to solve this issue?
Once again thanks..

How do I read and write at the same time using the NI-CAN channel API?

Here's the situation. I have one CAN bus, and I need to read and write channel data (using the channel API) at the same time both at an interval of 20 ms. It's easy to do one or the other using the channel API, but you can't setup a channel task to do both. It's either input or output, not both. Is this even possible?

Hi,
yes , this is possible. But you have to create two tasks, one for input and one for output. see the attached example for LabVIEW.
If you download and install NI-CAN 2.4 you will get this example and one for C and VB as well.
DirkW
Attachments:
Single Sample Input Output same Port.vi ‏79 KB

How do I set an external HD permission to read AND write?

I received an iMac for Christmas and need a little help. I have a 2TB external HD that contains .shn and .flac files of GD concerts (and other music). I managed to find Cog that will play them...but what I want to do is download them and move them upon completion to the external HD. I can not do this because the HD is read only. I can move stuff to a SD card because it is read and write. I assume when I change the permission I will be able to move the folder of a show to the HD as well. Surely this is simple... Thank You and sorry for the dumb question!

Your external hard drive is likely NTFS formatted for use with a PC.
OSX can read but cannot write to NTFS formatted volumes. You can install software that allows writing to a NTFS drive, as Niel has suggested, or you can reformat your external drive using Disk Utility for use with your Mac.
If you decide to reformat your drive for Mac use, copy your data off to another drive before you proceed.

Read and write speeds of PCI-E SSD 256GB

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