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views:

123

answers:

1
Q: 

I need raw read data from and write data into drive..help

I need raw read data from and write data into drive..not via existed filesystem like fat32 or something....i just wanna raw write read...... I was told in Windows i can use CreateFile WriteFile and ReadFile APIs to access data in drive directly... but I dont know in Linux whether there r similar functions....

dont tell me to use hardware driver programming, coz i am just a newbie in linux programming.. thanx a lot....

+1  A: 

Files /dev/hd* and /dev/sd*, depending on your setup, contain raw disk data. You need root account usually.

Use mount command to find out which disks/partitions are mapped to which files.

liori  2009-10-14 11:01:16
But what r the functions? r they still like read() and write?
Macroideal  2009-10-14 11:18:58
@Macroideal: yes. open/read/write should behave much the same as when used on regular files. For the most part on linux/unix, everything is a file.
Kjetil Jorgensen  2009-10-14 13:20:13
i think you can also modify the permissions for those devices and use them as a normal useryou'll need to unmount that device before reading or writing to it directly.
Gautham Ganapathy  2009-10-14 15:48:30
Macroideal, is "r" a verb? If so, what does it mean? I'm sorry, English is not my native language and my dictionary doesn't have it.
liori  2009-10-14 17:52:53
@liori, "r" is a contraction of "are".
Colin Pickard  2009-10-30 10:17:43

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