Tandberg Data NAS Hardware Viking FS-1500 - Manual (Page 30)

Tandberg Data Storage & File Server Management
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3-10 Tandberg Viking Series Storage Server Administration Manual
3.8. Scheduling Defragmentation
Defragmentation is the process of analyzing local volumes and consolidating
fragmented files and folders so that each occupies a single, contiguous
space on the volume. This improves file system performance. Because
defragmentation consolidates files and folders, it also consolidates the free
space on a volume. This reduces the likelihood that new files will be
fragmented.
Defragmentation for a volume can be scheduled to occur automatically at
convenient times. Defragmentation can also be done once, or on a recurring
basis.
Notes
Scheduling defragmentation to run no later than a specific time prevents the
defragmentation process from running later than that time. If the defragmentation
process is running when the time is reached, the process is stopped. This setting is
useful to ensure that the defragmentation process ends before the demand for
server access is likely to increase.
If defragmenting volumes on which shadow copies are enabled, use a
cluster (or allocation unit) size of 16 KB or larger during the format.
Otherwise defragmentation registers as a change by the Shadow Copy
process. This increase in the number of changes forces Shadow Copy to
delete snapshots as the limit for the cache file is reached.
Warning
Allocation unit size cannot be altered without reformatting the drive. Data on
a reformatted drive cannot be recovered.
Note
NTFS compression is supported only if the cluster size is 4 KB or smaller.
3.9. Disk Quotas
Disk quotas track and control disk space use in volumes.
Note
To limit the size of a folder or share, see “Directory Quotas” in Chapter 6.
Configure the volumes on the server to perform the following tasks:
• Prevent further disk space use and log an event when a user
exceeds a specified disk space limit.
• Log an event when a user exceeds a specified disk space warning
level.