raw device

[Prashanth Waugh]

what is the differance between raw device file & raw device file system

Thanks

[Hasan Atasoy]

hi ;

raw device : oracle or another application use logical device directly without a filesystem on it . /dev/vg0123/lvol123 or /dev/dsk/c1t1dw unix buffer cache passed by this method.

filesystem : data put on the logical device by creating a filesystem on it. buffer cache is used for io .

Hasan

[Jeeshan]

A raw device is a special kind of block device file that allows accessing a storage device such as a hard drive directly, bypassing the OS caches and buffers.

If you use the raw file for creating database or cluster the data contains in raw device file system.