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VOL2951
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1992-01-07
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P r o g r a m m a T h e e k volume 2951
Titel: Hard disk optimizers, (interleave) utilities
Number Name Size Date Comments
CATALOG 951 1090 3-10-90 This list
2951.01 CHECKBAK COM 2617 1-02-86 Checks Archive Bit of file
2951.02 DELDIR COM 3058 12-04-86 Delete subdirectory together with all
children
2951.03 DISKPERF TXT 3810 12-27-86 Notes about interleave and HD speed
2951.04 DOG ZIP 35126 3-09-90 DOG - Disk OrGanizer, safe (slow?)
optimizer
2951.05 GO BAT 860 10-09-86 Start utils
2951.06 IAU ZIP 66938 3-09-90 Interleave Adjustment
2951.07 ILEAVE TXT 25 11-10-88 Intro about interleave
2951.08 LISTFRAG COM 2760 12-04-86 List fragmented files
2951.09 NAMEDIR COM 2873 12-04-86 Rename subdirectory
2951.10 PACKDISK COM 4736 12-04-86 Disk optimizer
2951.11 PARK COM 372 12-04-86 Park harddisk heads
2951.12 PKUNZIP EXE 21440 7-21-89 Needed to unpack .ZIP files
2951.13 README 299 12-11-86 Intro utilities
2951.14 SST ZIP 28832 3-09-90 Fast disk optimizer (risky)
2951.15 TRANSDIR COM 3776 12-04-86 Kind of XCOPY
2951.16 UTILS DOC 23458 2-22-89 Desc of "PACKDISK utilities"
VOL2951 ABS 3917 3-10-90 Disk abstract by M.
18 File(s) 144384 bytes free on volume VOL2951
*** DOG - Disk OrGanizer ***
A disk that has been in use a while will have fragmented files and
directories; that is, some of its files and directories are no longer
written in contiguous disk clusters, but are located wherever DOS was
able to find available disk space. This increases the time required
to access any of that data, puts more wear on your disk drive's head
actuator and increases the noise generated by the disk.
Disk OrGanizer will help you speed up your disk access times by
defragmenting files and removing deleted entries from directories. It
will also allow you to determine the order of files and subdirecto-
ries.
It can also free some disk space by truncating subdirectories. A nice
side effect of this is that non-fragmented files are much easier to
recover with the many unerase programs available.
*** SST - The Seek Stopper ***
SST is a program that is designed to reorganize a DOS disk so that it will
run "Faster". Normal daily use of a disk will produce a disk with many
fragmented files and subdirectories. Simply put, these are files that are
not completely contiguous or together, but are spread out all
over the disk. These fragmented files and subdirectories slow disk access
down because DOS must tell the Disk Head to Seek to other parts of the disk
to pick up other parts of the same file.
For example, your disk might have three files on it that we will call A,B,
and C. Different parts might be arranged as follows....
AAAAAAABBBBBBBBAAAC CCAAABBBB CCC
SST would reorganize the three files so that all of their parts would be
contiguous....
AAAAAAAAAAAAABBBBBBBBBBBBCCCCCC
This change would shorten the amount of time that it takes DOS to read in the
file. If a subdirectory is fragmented, fixing it will speed up disk access
time even more noticeably!
Some disk optimization programs use the slower and safer method of buffering
file data to the disk. While this practically eliminates the chances of data
losses because of accidents such as power failures, it makes the program run
incredibly slow on a nearly full disk.
WARNING: It is strongly advised that the user back up his disk before using
SST. Since SST buffers all Data, Tables, and Directories to Memory,
IF A POWER FAILURE OCCURS WHILE CLUSTER SWAPPING IS IN
ACTION... ALL DATA WILL BE LOST.
The Same thing goes for ANY interruption during the SWAP procedure. Simply
LEAVE SST alone after pressing "Y" when prompted!
*** IAU - Interleave Adjustment Utility ***
IAU is a program which changes the physical arrangement of
data on the computer's hard disk in order for the CPU to be
able to access (read and write) the data in the least amount
of time. This causes the computer system to operate in the
fastest possible manner.
This manual describes some basics of hard disk operation.
Then it explains what the "interleave factor" is, and why it
might be changed. A description of the software algorithm
follows.
PACKDISK Utilities
DELDIR ∙ Deletes a subdirectory together with its files and
subdirectories.
LISTFRAG ∙ Lists all fragmented files in the drive.
NAMEDIR ∙ Renames a subdirectory.
PACKDISK ∙ Eliminates file fragmentation in the drive.
∙ Eliminates unallocated spaces between files.
∙ Re-integrates lost clusters (file allocation
units) into the available space on the disk.
∙ Packs the root directory and subdirectories and
frees subdirectory trailing clusters.
TRANSDIR ∙ Transfers a subdirectory together with its files
and subdirectories into another directory in the
same drive.
PARK ∙ Parks disk(s) before power off.