OS2AHCI.ADD

Product Support
OS/2 1.3
OS/2 2.0
OS/2 2.1
OS/2 2.11 SMP
OS/2 Warp 3
OS/2 Warp Connect
OS/2 Warp 4	*
OS/2 Warp Server for e-Business	S

The OS/2 AHCI adapter device driver supports both ATA and ATAPI devices in a single driver. An ATAPI/CD-ROM filter driver is only required if you want to read/write CD-DA (audio) format CDs.

AHCI or SATA compatibility mode has to be activated in BIOS options.

Syntax

BASEDEV=OS2AHCI.ADD <parameters> 

Parameters

• /a - Set adapter for adapter-specific options(default = -1, all adapters)
• /b:<baud> - Initialize the COM port to the specified baud rate
• /c:<addr> - Set debug COM port base address in hex (default = 3f8); if used, this option should come before any /d options.
• /d - Debug output on COM port; multiple "/d" options will increase verbosity:

  1 = requests

  2 = detailed

  3 = verbose, including MMIO operations

• /g:<vendor>:<device> - Add generic PCI ID to list of supported AHCI adapters (e.g. /g:8086:2829)
• /p - Set port for port-specific options(default = -1, all ports)
• /r - Reset ports during initialization (default = off unless the [Intel] AHCI controller was found to be initialized by the BIOS to SATA mode)
• /t - Perform thorough PCI ID scan; default = on, can be turned off with /!t to perform only a PCI class scan
• /w - Allows the trace buffer to wrap when full.

Port-specific Options

• /s Enable SCSI emulation for ATAPI units (default = on) SCSI emulation is required for tools like cdrecord.
• /n Enable NCQ (Native Command Queuing) for hard disks (default = off)
• /ls Set link speed (default = 0):

  0 = maximum,

  1 = limit to generation 1

  2 = limit to generation 2

  3 = limit to generation 3

• /lp - Set link power management (default = 0):

  0 = full power management,

  1 = transitions to "partial slumber state" disabled,

  2 = transitions to "slumber state" disabled,

  3 = transitions to both partial and slumber states disabled

• /4 - Force track size to be 56 sectors regardless of the reported disk geometry to optimize partition boundaries for hard disks with 4096 byte sectors.

Versions

• 1 - Created by Christian Müller, Markus Thielen. Open Source under the GNU GPL license
• 1.22
• 1.28 (2013-06-01)
• 1.32 (2013-11-09)
• 2.07 (2019-03-27)

Links

• https://trac.netlabs.org/ahci