EIDE2300 Beta Driver for OS/2 2.x Documentation
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Summary of Changes
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- Improved Drive Speed Support
- Update drive speed table
- Access to drive by DMA mode support
Please follow the steps below in installing the driver for
the EIDE2300PLUS disk controller.
1. Install the OS/2 driver.
Copy EIDE2300.ADD to the OS/2 directory of your system.
Use a text editor to edit the CONFIG.SYS file. Add the
following line:
BASEDEV = EIDE2300.ADD [/switches]
Note: This line must not contain neither drive nor path
information.
Parameters:
A: adapter number
U: drive number
PIOSPEED: Set the drive PIO speed
The PIO speed of drive is from 0 to 8 or A.
DMASPEED: 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.
NOTES: Only one speed mode can be specified per drive.
Do not set a speed setting for the driver higher
than the speed setting that the EIDE2300.EXE Install
utility reported for your drive(s).
The driver will automatically detect and set the
speed of drive if user doesn't specify it.
Example:
If you want your EIDE2300PLUS controller to run with drive
0 at DMA speed 7 and drive 1 at PIO speed 5, add the follow-
ing statement to the file CONFIG.SYS -
BASEDEV = EIDE2300.ADD /A:0 /U:0 /DMASPEED:7 /U:1 /PIOSPEED:5
2. Delete the "BASEDEV = IBM1S506.ADD" device setting.
Delete the command line "BASEDEV = IBM1S506.ADD" from the
CONFIG.SYS file, if it exists.
3. Reboot the system.
About ATAPI Devices
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This driver does not support ATAPI devices (like
IDE CD-ROM) on the secondary ISA connector. If you want
to use an IDE CD-ROM on the secondary ISA connector in
OS/2 2.x :
HDD(s) on VL-IDE as primary controller
IDE CD-ROM on secondary controller
Edit the CONFIG.SYS as follows:
BASEDEV=EIDE2300.ADD /V /A:1 /I (In addition to any
other switches you may be using)
BASEDEV=IBM1S506.ADD /V /A:0 /I
(You need the updated IBM1S506.ADD driver which supp-
orts ATAPI devices)
Enhanced IDE Hard Drive
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If you have an Enhanced IDE hard drive that has a capacity
of greater than 528M (greater than 1024 cylinders), note
the following restrictions :
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.
To overcome these restrictions, you can enable the drive
LBA mode in BIOS (EIDE2300 BIOS or motherboard BIOS with
this support). BIOS will perform LBA translation for this
drive, then the translated number of cylinders will be less
than 1024.
The following switches are valid with the EIDE2300.ADD driver-
/V = Verbose Mode
Displays controller status and drive geometry informa-
tion during OS/2 initialization.
/A:0 = Adapter number
Adapter 0 has default parameters for a primary adapter.
Adapter 1 has default parameters for a secondary adapter.
/U:0 = 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 recover 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:(1314,7,26,-1) or /GEO:20 = 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 config-
ured as follows:
BASEDEV=EIDE2300.ADD /V /A:1 /I
BASEDEV=MOREDASD.ADD
BASEDEV=EIDE2300.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-address-
ing 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 partic-
ular drive.
Sample Command Lines:
BASEDEV=EIDE2300.ADD /V /A:0 /U:0 /T:10 /GEO:(1314,7,26,-1) /A:1 /I
BASEDEV=EIDE2300.ADD /V /A:1 /U:0 /GEO:20
BASEDEV=EIDE2300.ADD /V /A:0 /U:0 /!SMS
BASEDEV=EIDE2300.ADD /V /A:0 /U:0 /LBA
BASEDEV=EIDE2300.ADD /V /A:0 /!R
BASEDEV=EIDE2300.ADD /V /A:0 /U:0 /DMASPEED:7
BASEDEV=EIDE2300.ADD /V /A:0 /U:0 /PIOSPEED:5 /U:1 /PIOSPEED:6
END