38 – Library Management Module
Media
Magnetic Disk z z
Read/Write WORM
Removable Media z z z
Tape Magnetic Optical USB Storage Device
Media Magnetic Disk Magnetic disk - as a protected storage library is supported on any OS supported file system. Disks, disk partitions, or logical volumes are addressed as mounted file systems or by network protocol (CIFS/NFS). Each addressable storage unit is referred to as a Mount Path. A library can have any number of Mount Path. Access to data stored on Mount Paths can be shared with other Media Agents. The primary advantage of Magnetic Disk is it’s ability to conduct multiple simultaneous read/write operations. The second advantage is write speed. Normally, magnetic disk is used as read/write media. However, in archive situations, Write Once Read Many (WORM) media may be required and is supported. Removable Media Removable Media is supported in three forms – Tape, Magnetic Optical (R/W and WORM), and USB storage devices. The most common of the three is tape. Tape media has its advantages in being a low cost storage media that is easily transportable for offsite protection and disaster recovery. Tape media has its disadvantages in that it is a sequential access medium with a potential for wasting capacity if the tape becomes unavailable or removed before data has been written to the end of the tape. In some cases, a tape is deliberately not filled in order to meet data protection (e.g. removal) or operational needs (e.g. business boundaries).
CommVault System Administration Course – R02