HyperDisk provides disk information, mainly on space usage, including a
bar graph indicating used and free space. The graph normally represents used
space with the colour green. For example, 37% would be represented:
![[disk usage graph]](/cgi-bin/hdisk?percentage=37)
Should usage extend to or beyond 85% the colour becomes
red, indicating the disk is overfull. For example, 89% would be represented:
![[disk usage graph]](/cgi-bin/hdisk?percentage=89)
Below the usage graph is a table. This table contains data on space
utilization in blocks and Mbytes, error count, etc. For volume sets the
data for each member device is listed.
Here is an example showing this server's
system disk, or enter a device name of your choice here:
The HyperDisk facility is used by simply specifying the path
/cgi-bin/hdisk, adding any required disk to the path. For example,
/cgi-bin/hdisk/sys$sysdevice. To specify more than one disk to be reported
on at the same time separate them using colons, commas, or forward-slashes.
For example
/cgi-bin/hdisk/sys$sysdevice:user$disk:applications$disk or
/cgi-bin/hdisk/sys$sysdevice/user$disk/applications$disk.
Of course, the link does not have to be embedded in an HTML document.
Simply click on the Location or URL text box of your browser
and enter the path as above. Bookmark any disks of particular interest.
As shown above, HyperDisk can also be used from a forms interface. The
following HTML provides the example selection list shown here:
<FORM ACTION="/cgi-bin/hdisk">
<SELECT NAME=disk>
<OPTION SELECTED>SYS$SYSDEVICE
<OPTION>DKA0
<OPTION>DKA100
<OPTION>DUA0
<OPTION>DUA1
</SELECT>
</FORM>
<INPUT TYPE=submit VALUE="list disk">
HyperDisk can also be used to embed the bar-graph representing disk space
usage in any HTML document, using an IMG tag similar to the following example:
![[graph]](/cgi-bin/hdisk/sys$sysdevice?graphiconly)
[more]
<P><IMG SRC="/cgi-bin/hdisk/sys$sysdevice?graphiconly" ALIGN=middle ALT="[graph]">
[<A HREF="/cgi-bin/hdisk/sys$sysdevsk/?furtherinfo">more</A>]