Installation guide

With the radisk program, you can perform the following tasks on a DSA

disk device:

• Clear a forced error indicator

• Set or clear the exclusive access attribute

• Replace a bad block

• Scan the disk for bad blocks

Refer to the radisk

(8) reference page for more information.

The scu program allows you to perform the following tasks on SCSI disk

devices, in addition to other tasks:

• Format media

• Reassign a defective block

• Reserve and release a device

• Display and set device and program parameters

• Enable and disable a device

Refer to Appendix B and to the scu

(8) reference page for more information.

7.7 Monitoring Disk Use

To ensure an adequate amount of free disk space, you should regularly

monitor the disk use of your conﬁgured ﬁle systems. You can do this in any

of the following ways:

• Check available free space by using the df command

• Check disk use by using the du command or the quot command

• Verify disk quotas (if imposed) by using the quota command

You can use the quota command only if you are the root user.

7.7.1 Checking Available Free Space

To ensure sufﬁcient space for your conﬁgured ﬁle systems, you should

regularly use the df command to check the amount of free disk space in all

of the mounted ﬁle systems. The df command displays statistics about the

amount of free disk space on a speciﬁed ﬁle system or on a ﬁle system that

contains a speciﬁed ﬁle.

The df command has the following syntax:

[- eiknPt ][-Ffstype ][ﬁle ][ ﬁle_system ...]

Administering the UNIX File System 7–21