Hp ProLiant DL585 G2 Storage-Server User Manual download pdf (Page 47)

snapshot. Otherwise, the number of changes caused by the defragmentation process can cause shadow

copies to be deleted faster than expected. Note, however, that NTFS compression is supported only

if the cluster size is 4 KB or sm aller.

NOTE:

To check the cluster siz e of a volume, use the fsutil fsinfo ntfsinfo command. To change

the cluster size on a volume that contain s data, back up the data on the volume, reformat it using

the new cluster size, and then restore the data.

Mounted drives

A mounted drive is a local volume attached to an empty folder (called a mount point) on an NTFS

volume. When enabling shadow copies on a volume that contains mounted drives, the mounted drives

are not included when shadow copies are taken. In addition, if a mounted drive is shared and shadow

copies a re enabled on it, users cannot access the shadow copies if they traverse from the host volume

(where the m o unt point is stored) to the m ounted drive.

For example, assume there is a folder F:\data\users,andtheUsers folder is a m ount point for G:\.

If shadow copies are enabled on both F:\ and G:\, F:\data is shared as \\server1\data,and

G:\data\users is shared as \\server1\users. In this example, users can access pr evious versions of

\\server1\data and \\server1\users but not \\server1\data\users.

Managing shadow copies

The vssadmin tool provides a command line capability to create, list, resize, and delete volume shadow

copies.

The system administrator can make shadow copies available to end users through a feature c alled

“Shadow Copies for Shared Folders.” The administrator uses the Properties menu (see Figure 7)to

turn on the Shadow Copies feature, select the volumes to be copied, and determine the frequency

with which shadow copies are made.

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Hp ProLiant DL585 G2 Storage-Server User Manual Page 47