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| VG4 Hard Disk Driver for IBM OS/2 2.x |
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NOTICE: This driver does not support ATAPI devices, e.g. IDE CD-ROM.
VG4.ADD is the hard disk driver for IBM OS/2 2.0 and IBM OS/2 2.1.
Your VG4 disk controller needs this device driver to take the
advantage of the high performance 32-bit VL-Bus when running under
OS/2.
********* Installing the Driver *********
1. Delete the original IBM OS/2 hard disk driver.
Delete the command line "BASEDEV = IBM1S506.ADD" from the CONFIG.SYS
file, if it exists.
2. Install the OS/2 driver.
Copy VG4.ADD to the subdirectory, /OS2, of your system.
Use a text editor to edit the CONFIG.SYS file. Add the following
line:
BASEDEV = VG4.ADD /...(Please refer to next paragraph for the switch defintion)
3. Reboot the system.
********* Switch Definition *********
/V = Verbose Mode
Displays controller status and drive geometry information
during OS/2 initialization.
/A:n = Adapter n
Adapter 0 has default parameters for the primary adapter.
Adapter 1 has default parameters for the secondary adapter.
/U:n = Unit Id
Unit 0 indicates parameters apply to the master unit.
Unit 1 indicates parameters apply to the slave unit.
/T:10 = Error retry time in seconds. (dec)
Indicates the total allowable error recovery time for
a request. Error recovery times < 5 seconds will be
ignored. This parameter defaults to 30 seconds. A shorter
interval may be desirable for fault tolerant applications.
/GEO:(n1,n2,n3,n4) or /GEO:n1 = Drive geometry override (dec)
Indicates the Cylinder/Head/Sector geometry for the drive.
The fourth parameter is the Write Precompensation Cylinder
which may be omitted for drives which do not require
precompensation.
As an alternate format standard BIOS drive types may
be used. Types (0-47) are supported. User defined types
48, 49 should be entered directly by in the previous
format.
When specified, this parameter overrides other geometry sources.
If this parameter is absent, other geometry sources discussed
above will be used.
/I = Ignore adapter
The driver automatically attempts to locate and initialize
both the primary and secondary adapters. In some cases other
DASD controllers may appear between the primary and secondary
IDE controllers. In these cases the system should be configured
as follows:
BASEDEV=VG4.ADD /V /A:1 /I
BASEDEV=MOREDASD.ADD
BASEDEV=VG4.ADD /V /A:0 /I
/!R = Disable adapter resets
Disables adapter resets. In most cases resets are beneficial
to assist in recovering from transient hardware problems
such as lost interrupts, timeouts, or commands a particular
adapter may not support.
However, for some ESDI adapters, options set by vendor
unique commands such as 'Sector Sparing' may be lost after
after a reset. Setting this switch is recommended for ESDI
adapters with disks formatted using 'Sector Sparing'.
/!SMS = Disable Set Multiple Mode support
This switch disables Set Multiple Support which the improves
performance of some IDE drives. The /V - (Verbose) option
will indicate whether this feature has been enabled
on a particular drive.
The Set Multiple Support is default enabled if the drive have
this feature.
/LBA = OS/2 access the drive using LBA addressing.
This switch enables the OS/2 write commands with LBA-addressing
to the drive. If the drive does not have this feature, this
switch will be ignored. The /V - (Verbose) option will indicate
whether this feature has been enabled on a particular drive.
/PIOSPEED:n = Set the drive PIO speed n
The PIO speed of drive is from 0 to 8 or A.
/DMASPEED:n = Set the drive DMA speed
The DMA speed of drive is from 0 to 8. If the drive does not have
this feature, the switch will be ignored and the driver will
automatically detect and set the speed of drive.
NOTICE: Only one speed mode can be specified.
If user set improper speed of a drive, the drive maybe not work.
The driver will automatically detect and set the speed of drive
if user does not specify it.
********* Examples *********
BASEDEV=VG4.ADD /V /A:0 /U:0 /T:10 /GEO:(1314,7,26,-1) /A:1 /I
BASEDEV=VG4.ADD /V /A:1 /U:0 /GEO:20
BASEDEV=VG4.ADD /V /A:0 /U:0 /!SMS
BASEDEV=VG4.ADD /V /A:0 /U:0 /LBA
BASEDEV=VG4.ADD /V /A:0 /!R
BASEDEV=VG4.ADD /V /A:0 /U:0 /DMASPEED:7
BASEDEV=VG4.ADD /V /A:0 /U:0 /PIOSPEED:5 /U:1 /PIOSPEED:6
********* Enhanced IDE Hard Drive *********
If you have an Enhanced IDE hard drive that has a capacity of
greater than 528M (greater than 1024 cylinders), note
the follow restriction :
o The FAT file system is limited to partition sizes of less
than 1024 cylinders.
o The HPFS file system can support data partition that are
greater than 1024 cylinders. Howerver the partition from
which OS/2 is started cannot be greater than 1024 cylinders.
The HPFS file system can support drives up to 2GB.
For breaking the restriction, you can enable the drive LBA mode
in BIOS (VG4 BIOS or Main BIOS with this support).
BIOS will perform LBA translation for this drive, then the CHS
geometry of this drive at Int 13h interface is different
from the real one. The translated number of cylinders will
less than 1024.
From making partitions of the drive to using the drive,
please keep the SAME SELECTION on the drive LBA mode in BIOS.
If you alter your selection, the data corruption may happens.
Download Driver Pack
After your driver has been downloaded, follow these simple steps to install it.
Expand the archive file (if the download file is in zip or rar format).
If the expanded file has an .exe extension, double click it and follow the installation instructions.
Otherwise, open Device Manager by right-clicking the Start menu and selecting Device Manager.
Find the device and model you want to update in the device list.
Double-click on it to open the Properties dialog box.
From the Properties dialog box, select the Driver tab.
Click the Update Driver button, then follow the instructions.
Very important: You must reboot your system to ensure that any driver updates have taken effect.
For more help, visit our Driver Support section for step-by-step videos on how to install drivers for every file type.