Linux-Basics-Complete-Course-With-Notes-Slides

DAS NAS AND SAN

Now that you are familiar with basic of storage in Linux lets learn about external storage.
DAS - Direct Attached Storage, external storage is attached directly to the host system tha requires the space.
NAS - Network Attached Storage quite similar to NFS server.
SAN - Storage Aread Network, this technology uses a fiber channel for providing high-speed storage.

#### NFS

NFS - Does not store data in blocks. Instead, it saves data in form of files. It works on service-client model.
NFS server maintains an export configuration file at /etc/exports that defines the clients which should be able to access the directories on the server. /etc/exports looks like this
```
[~]$ /etc/exports
/software/repos 10.61.35.201 10.61.35.202 10.61.35.203
```
To exports all the mounts defined in /etc/exports use
```
[~]$ exportfs -a
```
To manually export a directory use below command
```
[~]$ exportfs -o 10.61.35.201:/software/repos
```