| cd.9 (b02f4e9071c6704c8a49ccf7af846d1cb1881e81) | cd.9 (d5a8819cb767682dbed8b6bd75a68f382c297603) |
|---|---|
| 1.\" Copyright (c) 1997 2.\" John-Mark Gurney. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 76 unchanged lines hidden (view full) --- 85In general these types of quirks should not be 86added to the 87.Xr cd 4 88driver. 89The reason is that the driver does several things to attempt to 90determine whether the drive in question needs 10 byte commands. 91First, it 92issues a CAM Path Inquiry command to determine whether the protocol that | 1.\" Copyright (c) 1997 2.\" John-Mark Gurney. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 76 unchanged lines hidden (view full) --- 85In general these types of quirks should not be 86added to the 87.Xr cd 4 88driver. 89The reason is that the driver does several things to attempt to 90determine whether the drive in question needs 10 byte commands. 91First, it 92issues a CAM Path Inquiry command to determine whether the protocol that |
| 93the drive speaks typically only allows 10 byte commands. (ATAPI and USB | 93the drive speaks typically only allows 10 byte commands. 94.Po 95ATAPI and USB |
| 94are two prominent examples of protocols where you generally only want to | 96are two prominent examples of protocols where you generally only want to |
| 95send 10 byte commands.) Then, if it gets an ILLEGAL REQUEST error back | 97send 10 byte commands. 98.Pc 99Then, if it gets an ILLEGAL REQUEST error back |
| 96from a 6 byte MODE SENSE or MODE SELECT command, it attempts to send the 10 97byte version of the command instead. 98The only reason you would need a 99quirk is if your drive uses a protocol (e.g. 100.Tn SCSI ) 101that typically doesn't have a problem with 6 byte commands. 102.El 103.Sh FILES --- 21 unchanged lines hidden --- | 100from a 6 byte MODE SENSE or MODE SELECT command, it attempts to send the 10 101byte version of the command instead. 102The only reason you would need a 103quirk is if your drive uses a protocol (e.g. 104.Tn SCSI ) 105that typically doesn't have a problem with 6 byte commands. 106.El 107.Sh FILES --- 21 unchanged lines hidden --- |