Creating Raid Arrays - Red Hat ENTERPRISE LINUX 4 - INTRODUCTION TO SYSTEM ADMINISTRATION Administration Manual

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Making sure that the disk quotas remain accurate
•
Creating a disk usage report entails running the
produces this output:
repquota /home
*** Report for user quotas on device /dev/md3
Block grace time: 7days; Inode grace time: 7days
User used
----------------------------------------------------------------------
root -- 32836
matt -- 6618000 6900000 7000000
More information about
tion Guide, in the chapter on disk quotas.
Whenever a file system is not unmounted cleanly (due to a system crash, for example), it is necessary
to run . However, many system administrators recommend running
quotacheck
regular basis, even if the system has not crashed.
The process is similar to the initial use of
Here is an example
quotacheck
quotacheck -avug
The easiest way to run
run once a week, though there may be valid reasons to pick a longer or shorter interval,
quotacheck
depending on your specific conditions.

5.9.8. Creating RAID Arrays

In addition to supporting hardware RAID solutions, Red Hat Enterprise Linux supports software
RAID. There are two ways that software RAID arrays can be created:
While installing Red Hat Enterprise Linux
•
After Red Hat Enterprise Linux has been installed
•
The following sections review these two methods.
5.9.8.1. While Installing Red Hat Enterprise Linux
During the normal Red Hat Enterprise Linux installation process, RAID arrays can be created. This is
done during the disk partitioning phase of the installation.
To begin, you must manually partition your disk drives using Disk Druid. You must first create a new
partition of the type "software RAID." Next, select the disk drives that you want to be part of the
RAID array in the Allowable Drives field. Continue by selecting the desired size and whether you
want the partition to be a primary partition.
Once you have created all the partitions required for the RAID array(s) that you want to create, you
must then use the RAID button to actually create the arrays. You are then presented with a dialog box
where you can select the array's mount point, file system type, RAID device name, RAID level, and
the "software RAID" partitions on which this array is to be based.
Once the desired arrays have been created, the installation process continues as usual.
Block limits
soft hard
0 0
can be found in the Red Hat Enterprise Linux System Administra-
repquota
quotacheck
command:
on a regular basis is to use
quotacheck
utility program. Using the command
repquota
File limits
grace used soft
4
17397
when enabling disk quotas.
cron
Chapter 5. Managing Storage
hard grace
0 0
0 0
quotacheck
. Most system administrators
on a