Cainiao asked linux to wake up the hard disk space for sleeping

Cainiao asked linux to wake up the hard disk space to sleep-Linux general technology-Linux technology and application information. The following is a detailed description. System: redhat enterprise server 5
[Root @ D71T01/] # fdisk-l
View hard disk Information
Disk/dev/sda: 1198.2 GB, 1198295875584 bytes
255 heads, 63 sectors/track, 145684 cylinders
Units = cylinders of 16065*512 = 8225280 bytes

Device Boot Start End Blocks Id System
/Dev/sda1 1 5 40131 de Dell Utility
/Dev/sda2 6 23293 187060860 83 Linux
/Dev/sda3*23294 23318 200812 + 83 Linux
/Dev/sda4 23319 145684 982904895 5 Extended
/Dev/sda5 23319 145684 982904863 + 8e Linux LVM
View partition information
[Root @ D71T01/] # df-h
/Dev/mapper/VolGroup_ID_19366-LogVol1
3.9G 549 M 3.2G 15%/
/Dev/sda3 190 M 16 M 165 M 9%/boot
Tmpfs 506 M 0 506 M 0%/dev/shm
/Dev/mapper/VolGroup_ID_19366-LogVol2
3.9G 777 M 3.0G 21%/tmp
/Dev/mapper/VolGroup_ID_19366-LogVol5
359G 11G 330G 4%/usr
/Dev/mapper/VolGroup_ID_19366-LogVol4
3.9G 228 M 3.5G 7%/var
/Dev/mapper/VolGroup_ID_19366-LogVolHome
176G 268 M 167G 1%/home


If you want to use a sleeping space, use mount.
Create backup
[Root @ D71T01/] # mount/dev/sda5/backup
Mount:/dev/sda5 already mounted or/backup busy Why ????
In addition, How to Write fstab?