所謂的active/active arrays

"Active/passive means that one controller is active to process I/O requests, while the other is idle in standby mode ready to take over I/O activity should the active primary controller fail or be taken offline.

An active/active configuration enables both controller nodes to process I/Os, and provide a standby capability for the other."

Ref:
Active/active vs. active/passive arrays
(http://searchstorage.techtarget.com/answer/Active-active-vs-active-passive-arrays
)

windows dd usage

Show you how to clone usb disk first 100MB

suppose your usb disk is drive number 1 (check windows "Disk management" and find out its number)

dd if=\\.\PhysicalDrive1 of=sdb.dd bs=1M count=100

But this windows dd's writing to disk is very SLOW.

Reference:

http://www.chrysocome.net/dd

羅技 mk320 鍵盤

不好用, 桌面鈕有時晃動一下就會被觸發

Netbeans theme

aloha color theme

1. Install

Tools -> plugins -> Available plugins : search "theme"

check "Extra color theme" and install it

2. Setup

Tools -> options -> Fonts & Colors : choose Aloha

Ref:

http://blog.huikau.com/2008/04/28/aloha-color-theme-for-netbeans-61/

CRC calculation

INPUT: 11010011101100

PATTERN (polynomial): 1011

To calculate n-bit checksum, you need a (n+1)-bit pattern.

In this example, we'll calculate CRC-3 (3-bit).

CRC-n pattern can be found in Wiki.

Method:

1. Align INPU & PATTERN to the left.

2. Read the leftmost bit of INPUT.

If the bit is 0, do nothing.

If the bit is 1, let INPUT = (INPUT XOR PATTERN).

Move PATTERN to the right by one bit.

Repeat step 2 until you got a n-bit INPUT, which is the CRC-n.

Verify:

You should get 3-bit CRC: 101.

Ref:

CRC in wiki

[windows batch] using variables in for loop

In a windows batch file (.bat or .cmd):

FOR /L %%i IN (1,1,5000) DO {

ECHO %%i

sleep -m 500

}

ref:

http://serverfault.com/questions/59014/for-loop-counting-from-1-to-n-in-a-windows-bat-script

http://blog.crankybit.com/why-that-batch-for-loop-isnt-working/

Using glib in Windows (vc 2005 settings)

1. download glib Binaries and Dev and extract them to

F:\glib\glib_2.24.0_dll

F:\glib\glib-dev_2.24.0-2_win32

2. open VC 2005 and create a windows console project

project property (alt + f7)

* General -> Additional Include Directories: F:\glib\glib-dev_2.24.0-2_win32\include\glib-2.0

* Linker -> General -> Additional Library Dependencies: "F:\glib\glib-dev_2.24.0-2_win32\lib"

* Linker -> Input -> Additional Dependencies: glib-2.0.lib

* copy from F:\glib\glib-dev_2.24.0-2_win32\lib\glib-2.0\include\glibconfig.h to F:\glib\glib-dev_2.24.0-2_win32\include\glib-2.0\glibconfig.h

3. Try to build a program using glib :

#include (iostream)

#include (glib.h)

#include (glib/gprintf.h)

int main(int argc, char* argv[])

{

gchar ch[128];

g_sprintf(ch, "hello world");

std::cout((g_strup(ch)((std::endl;

return 0;

}

4. Before running your new program, put all libg*.dll in F:\glib\glib_2.24.0_dll\bin to your working directory (eg. Debug/).

Ref:

windows下glib使用- owe的专栏- CSDN博客