new file system creation

[KCS_1]

hi,

I am wonering that when i am creation new file system by using LVM every time, why i have to do specify under like that

# newfs -F vxfs /dev/vgXX/rlvol

alway,use charcter device file (rlvol)instead of block device file. why ??

please tell me more about..

thanks..

[Sridhar Bhaskarla · Accepted solution]

Hi,

With lvcreate, you first create a volume. With newfs, you lay filesystem structures on it so that you can create files and directories on it. The type of filesystem is dependent on the string "-F vxfs". It could be "hfs" if you intend to use hfs filesystem.

lvol is used to access the filesystem and rlvol represents the raw device. You will need to use the raw device to create the the filesystem structures.

-Sri

[Michael Steele_2]

Raw indicates a binary format.

There are three layers involved between the O/S and the data that resides on disks. The disk itself, LVM and the file system structure. During initial configuration of both LVM and the file system structure the raw device is used.

[John Poff]

Hi Patrick,

Good question. Here is a thread that explains it pretty well:

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x222631ec5e34d711abdc0090277a778c,00.html

JP