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optimize.hlp
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1992-08-30
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Diamond Edge Demo Version Extendible Help System
File: OPTIMIZE.HLP
Topics covered:
∙ Choosing the Optimization Method
∙ Other Optimization Options
∙ Optimizing your Drive
∙ Choosing the Optimization Method
Diamond Edge offers two optimization methods: Full
optimization and Compress Free Space. You select the
optimization methods by selecting the appropriate method under
the Optimize menu.
Full optimization is a complete optimization of your hard
disk. First, all of the directory sectors of a given subdirectory
are consolidated, then all of the sectors in each file within the
subdirectory are defragmented and consolidated, then all of the
files within a subdirectory are located consecutively on the disk.
Compressing free space eliminates free space from the area
of used disk space by moving it all to the end or beginning of the
disk. If there is any free space located within the allocated space
on the active drive it will be eliminated. Compressing Free space
does not defragment files, directory sectors, or directories it
simply moves clusters so there is no free space within the allocated
area. This basically segments your disk into two separate blocks,
all of the used space is together and all of the free space is
together.
We recommend that all disks be fully optimized when you first
receive Diamond Edge. After that you can use the compress free
space option to keep the free space contiguous in between full
optimizations. Use the disk fragmentation maps and statistics to
assist you in determining the level of disk fragmentation on each
of your disks.
∙ Choosing the Optimization Priority
Diamond Edge provides two optimization priorities: Optimization
for Reading and Writing. You select the optimization priority by
selecting the appropriate method under the Optimize menu. The
basic distinction between the two priorities is where on the disk
the allocated space is moved.
Selecting Prioritize for Reading will move all of the
allocated disk space to the beginning of the partition. This
improves the reading performance of the disk because all of the
directory sectors and file clusters are physically closer to the
FAT tables. This significantly reduces the amount of disk head
movement that is required to find and then read a file. Disk head
movement is the slowest component of any disk operation and the
amount of disk head movement is critical to disk performance.
Selecting Prioritize for Writing will move all of the
allocated disk space to the end of the partition. This improves
the writing performance of the disk because all of the free space
is physically closer to the FAT tables. The operating system does
not have to work very hard to find the free space and when it does
the disk head does not have to move very far to write the
information.
∙ Other Optimization Options
In addition to the Optimization Type and Priority, there are
a number other options available to you when doing an optimization.
The first three are: Auto-Fix errors, Ignore Illegal File Names,
and Save Lost Clusters. These functions should be familiar and
function exactly as described in Medic section.
Before each optimization, the disk is automatically subjected
to a Disk Medic pass to assess it's ability to be optimized. If ANY
disk errors are detected in the Disk Medic pass, they must be fixed
before the optimization can proceed. Optimization of a disk that
contains any errors is not allowed.
The other option involves the disposition of deleted files
within the directories. A full description of what happens when you
delete a file is given in Section 5.1 of the manual. The optimization
of a disk drive significantly reduces the probability of successfully
recovering a deleted file. If you select Remove Deleted, then the
space occupied in the directory sectors for the deleted files will
be removed. This will help speed up directory searches.
∙ Optimizing your Drive
Before you perform an optimization there is one thing left to
do: Backup your hard drive. Diamond Edge provides secure protection
against and recovery from a wide variety of disk related problems,
however there is NO SUBSTITUE for a valid up to date hard disk backup.
Regardless of the safeguards within the program, the only way to
protect against an unexpected power outage during an optimization is
to have a current hard disk backup. We find that using Diamond Back II
is the fastest and most reliable means to accomplish hard disk backups.
You may either optimize just the active drive by selecting Optimize
Drive from the Optimize menu or on multiple drives by selecting
Optimize Multiple. Before each disk is optimized, it is automatically
examined by the Disk Medic for problems. Any problems detected by the
Disk Medic must be fixed before optimization will be allowed. After
the disk has passed the Disk Medic examination, the optimization will
begin. A bell will ring to indicate that the optimization is complete.