Summary of ide driver parameters for kernel command line
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For legacy IDE VLB host drivers (ali14xx/dtc2278/ht6560b/qd65xx/umc8672)
you need to explicitly enable probing by using "probe" kernel parameter,
i.e. to enable probing for ALI M14xx chipsets (ali14xx host driver) use:
 
* "ali14xx.probe" boot option when ali14xx driver is built-in the kernel
 
* "probe" module parameter when ali14xx driver is compiled as module
  ("modprobe ali14xx probe" )                                        
 
Also for legacy CMD640 host driver (cmd640) you need to use "probe_vlb"
kernel paremeter to enable probing for VLB version of the chipset (PCI ones
are detected automatically).                                                
 
You also need to use "probe" kernel parameter for ide-4drives driver
(support for IDE generic chipset with four drives on one port).      
 
To enable support for IDE doublers on Amiga use "doubler" kernel parameter
for gayle host driver (i.e. "gayle.doubler" if the driver is built-in).    
 
To force ignoring cable detection (this should be needed only if you're using
short 40-wires cable which cannot be automatically detected - if this is not  
a case please report it as a bug instead) use "ignore_cable" kernel parameter:
 
* "ide_core.ignore_cable=[interface_number]" boot option if IDE is built-in
  (i.e. "ide_core.ignore_cable=1" to force ignoring cable for "ide1" )      
 
* "ignore_cable=[interface_number]" module parameter (for ide_core module)
  if IDE is compiled as module
 
Other kernel parameters for ide_core are:
 
* "nodma=[interface_number.device_number]" to disallow DMA for a device
 
* "noflush=[interface_number.device_number]" to disable flush requests
 
* "nohpa=[interface_number.device_number]" to disable Host Protected Area
 
* "noprobe=[interface_number.device_number]" to skip probing
 
* "nowerr=[interface_number.device_number]" to ignore the WRERR_STAT bit
 
* "cdrom=[interface_number.device_number]" to force device as a CD-ROM
 
* "chs=[interface_number.device_number]" to force device as a disk (using CHS)