[SunHELP] block vs raw device?

[Lee Khuong]

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Andrew,

Use the raw device and change your blocksize to 1024k for faster copy.

dd if=/dev/rdsk/c0t1d0s2 of=/dev/rdsk/c0t4d0s2 bs=1024k

Lee

"Meng, Andrew" wrote:
> 
> Hello,
> 
> According to my understanding, hard drive can be accessed by either raw
> device or block device. When I use dd to copy from one slice to another one,
> what device should I use, raw or block device?
> 
> dd if=/dev/rdsk/c0t1d0s2 of=/dev/rdsk/c0t4d0s2 bs=128  or
> 
> dd if=/dev/dsk/c0t1d0s2 of=/dev/dsk/c0t4d0s2 bs=128
> 
> Which one is better, why?
> 
> Thanks a lot!
> 
> Andrew
> 
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