HP ProLiant DL100 G2 DPSS, Руководство администратора

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Scheduling defragmentation
The following information applies to all models of the HP ProLiant storage server.
Defragmentation is the process of analyzing local volumes and consolidating fragmented
fi les and folders
so that each occupies a single, contiguous space on the volume. This improves fi le system performance.
Because defragmentation consolidates fi les and folders, it also consolidates the free space on a volume.
This reduces the likelihood that new fi les 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.
NOTE:
Scheduling defragmentation to run no later than a speci fi c 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 fi le is reached.
CAUTION:
Allocation unit size cannot be altered without reformatting the drive. Data on a reformatted drive
cannot be recovered.
For more information about disk defragmentation, read the online Help.
Disk quotas
The following information applies to all models of the HP ProLiant Storage Server.
Disk quotas track and control disk space use in volumes.
NOTE:
To limit the size of a folder or share, see " Directory quotas " on page 82 .
Con fi gure the volumes on the server to perform the following tasks:
• Prevent further disk space use and log an event when a user exceeds a speci fi ed disk space limit.
• Log an event when a user exceeds a speci fi ed disk space warning level.
When enabling disk quotas, it is possible to set both the disk quota limit and the disk quota warning
level. The disk quota limit speci fi es the amount of disk space a user is allowed to use. The warning level
speci fi es the point at which a user is nearing his or her quota limit. For example, a user’s disk quota limit
can be set to 50 megabytes (MB), and the disk quota warning level to 45 MB. In this case, the user
can store no more than 50 MB on the volume. If the user stores more than 45 MB on the volume, the
disk quota system logs a system event.
In addition, it is possible to specify that users can exceed their quota limit. Enabling quotas and not
limiting disk space use is useful to still allow users access to a volume, but track disk space use on a
per-user basis. It is also possible to specify whether or not to log an event when users exceed either their
quota warning level or their quota limit.
HP ProLiant DL100 G2 Storage Server administration guide
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