03-19-2009
If it's a local disk you could experiment with hdparm and your filesystems tuning utility (like tune2fs/reisertune/...) to tune it.
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QUOTAON(8) System Manager's Manual QUOTAON(8)
NAME
quotaon, quotaoff - turn filesystem quotas on and off
SYNOPSIS
quotaon [-v] filesystem ...
quotaon [-v] -a
quotaoff [-v] filesystem ...
quotaoff [-v] -a
DESCRIPTION
Quotaon announces to the system that disk quotas should be enabled on one or more filesystems. Quotaoff announces to the system that the
specified filesystems should have any disk quotas diskquotas turned off. The filesystems specified must have entries in /etc/fstab and be
mounted. Quotaon expects each filesystem to have a quota file named quotas located at the root of the associated file system. These
defaults may be overridden in /etc/fstab.
Available options:
-a If the -a flag is supplied in place of any filesystem names, quotaon/quotaoff will enable/disable all the filesystems indi-
cated in /etc/fstab to be read-write with disk quotas.
-v Causes quotaon and quotaoff to print a message for each filesystem where quotas are turned on or off.
FILES
quotas at the filesystem root with user quotas
/etc/fstab filesystem table
SEE ALSO
quota(1), setquota(2), fstab(5), edquota(8), quotacheck(8), repquota(8)
HISTORY
The quotaon command appeared in 4.2BSD.
4.2 Berkeley Distribution January 21, 1996 QUOTAON(8)