HP ProLiant ML310 G3 Storage Server Administration Guide (WSS R2 version, March 2006)

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 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.
NOTE:
Scheduling d
efragmentation 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 s
erver 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 d efragmentation registers as a change by the Shadow
Copy process. This increase in the number of changes forces S h adow Copy to delete snapshots as
the limit for the cache file is reached.
CAUTION:
Allocation unit size cannot be al tered without reformatting the drive. Data on a reformatted drive
cannot be recovered.
For more information ab out disk defragmentation, read the online Help.
Disk quot
as
The following information applies to all models of the HP ProLiant Storage Server.
Disk quot
as track and control disk space use in volumes.
NOTE:
To limit the size of a folder or share, see "Directory quotas"onpage84.
Configure the volumes on the ser ver to perform the following tasks:
• Prevent further disk space use and log an event when a user exceeds a specified disk space limit.
• Log a n event when a user exceeds a specified disk space warning level.
When enablin g d isk quotas, it is possible to set both the disk quota limit and the disk quota warning
level. The disk quota limit specifiestheamountofdiskspaceauserisallowedtouse.Thewarninglevel
specifies 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
diskquotasystemlogsasystemevent.
In addition, it is possible to specify that users ca n 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.
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