Shadow Copies
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NAS 2000s Administration Guide
Shadow Copies and Drive Defragmentation
When running Disk Defragmenter on a volume with shadow copies activated, all or some of
the shadow copies may be lost, starting with the oldest shadow copies.
If defragmenting volumes on which shadow copies are enabled, use a cluster (or allocation
unit) size of 16 KB or larger. Utilizing this allocation unit size reduces the number of copy outs
occurring on the 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 smaller.
Note:
To check the cluster size of a volume, use the
fsutil fsinfo ntfsinfo
command. To
change the cluster size on a volume that contains data, backup 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 are enabled on it, users cannot access the shadow copies if they
traverse from the host volume (where the mount point is stored) to the mounted drive.
For example, assume there is a folder E:\data\users, and the Users folder is a mount point for
F:\. If shadow copies are enabled on both E:\ and F:\, E:\data is shared as \\server1\data, and
E:\data\users is shared as \\server1\users. In this example, users can access previous versions
of \\server1\data and \\server1\users but not \\server1\data\users.
Содержание 345646-001 - StorageWorks NAS 2000s External Storage Server
Страница 16: ...About this Guide 16 NAS 2000s Administration Guide ...
Страница 56: ...Storage Management Overview 56 NAS 2000s Administration Guide ...
Страница 80: ...Disk Management 80 NAS 2000s Administration Guide ...
Страница 93: ...Shadow Copies 93 NAS 2000s Administration Guide Figure 46 Accessing shadow copies from My Computer ...
Страница 110: ...User and Group Management 110 NAS 2000s Administration Guide ...
Страница 146: ...Folder Printer and Share Management 146 NAS 2000s Administration Guide ...
Страница 151: ...Microsoft Services for NFS 151 NAS 2000s Administration Guide Figure 83 Server for NFS screen Server Settings tab ...
Страница 186: ...NetWare File System Management 186 NAS 2000s Administration Guide ...
Страница 200: ...Index 200 NAS 2000s Administration Guide ...