| README for WarpEngine/A4000T/A4091 SCSI kernels. |
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| Use the following options to disable options in the SCSI driver. |
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| Using amiboot for example..... |
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| To disable Synchronous Negotiation.... |
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| amiboot -k kernel 53c7xx=nosync:0 |
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| To disable Disconnection.... |
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| amiboot -k kernel 53c7xx=nodisconnect:0 |
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| To disable certain SCSI devices... |
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| amiboot -k kernel 53c7xx=validids:0x3F |
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| this allows only device ID's 0,1,2,3,4 and 5 for linux to handle. |
| (this is a bitmasked field - i.e. each bit represents a SCSI ID) |
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| These commands work on a per controller basis and use the option 'next' to |
| move to the next controller in the system. |
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| e.g. |
| amiboot -k kernel 53c7xx=nodisconnect:0,next,nosync:0 |
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| this uses No Disconnection on the first controller and Asynchronous |
| SCSI on the second controller. |
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| Known Issues: |
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| Two devices are known not to function with the default settings of using |
| synchronous SCSI. These are the Archive Viper 150 Tape Drive and the |
| SyQuest SQ555 removeable hard drive. When using these devices on a controller |
| use the 'nosync:0' option. |
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| Please try these options and post any problems/successes to me. |
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| Alan Hourihane <alanh@fairlite.demon.co.uk> |