Owner`s manual

Page 5-13System Administration
The DSKANA Command
The DSKANA command is an important part of your disk maintenance routine.
DSKANA analyzes the data on a specified disk and reports lost and mis-linked disk
blocks, inconsistent block counts, and other file errors.
Each file on the disk is stored in one or more disk blocks. AMOS keeps track of which
disk blocks are currently used in files and which are not by means of a special structure
called a "bitmap." Each disk has its own bitmap.
DSKANA compares the information in the bitmap with the actual data on the disk to
make sure the bitmap is accurate. For example, if DSKANA finds a disk block that is
part of a file, but the bitmap shows the block not in use, DSKANA reports an error.
When DSKANA finishes analyzing the disk, it rewrites the bitmap unless you tell it not to.
Use DSKANA frequently on all of your disks. It is a good practice to use DSKANA on
every disk just before you back up the files on that disk.
For more information on DSKANA, see the
System Commands Reference Manual .
NEVER use DSKANA (unless you are using the /C option described below) while other
users are accessing the specified disk; doing so may damage the bitmap and the files
on the disk.
To use DSKANA, follow these steps:
1.Log into OPR: by typing:
LOG OPR:
RETURN
2.Type DSKANA followed by the device name of the disk you want to analyze and
press
RETURN
. For example, to analyze DSK1:, type:
DSKANA DSK1:
RETURN
3.You now see:
[Begin analysis of DSK1:]
As DSKANA checks the disk, it displays the disk account numbers and, when it
finishes, it displays the results of its analysis. For example:
Eagle Series Computer Owner’s Manual, Rev. 03