diff options
Diffstat (limited to 'share/man/man4/cd.4')
| -rw-r--r-- | share/man/man4/cd.4 | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/share/man/man4/cd.4 b/share/man/man4/cd.4 index 4bb9b0d..7898e71 100644 --- a/share/man/man4/cd.4 +++ b/share/man/man4/cd.4 @@ -374,7 +374,8 @@ drives; however, this is not yet under way. The .Nm driver attempts to automatically determine whether the drive it is talking -to supports 6 byte or 10 byte MODE SENSE/MODE SELECT operations. Many +to supports 6 byte or 10 byte MODE SENSE/MODE SELECT operations. +Many .Tn SCSI drives only support 6 byte commands, and .Tn ATAPI @@ -389,17 +390,22 @@ After that, the driver defaults to using 6 byte commands (assuming the protocol the drive speaks claims to support 6 byte commands), until one fails with a .Tn SCSI -ILLEGAL REQUEST error. Then it tries the 10 byte version of the command to -see if that works instead. Users can change the default via per-drive -sysctl variables and loader tunables. The variable names are the same in +ILLEGAL REQUEST error. +Then it tries the 10 byte version of the command to +see if that works instead. +Users can change the default via per-drive +sysctl variables and loader tunables. +The variable names are the same in both instances: .Pp .Va kern.cam.cd.%d.minimum_cmd_size .Pp Where .Dq %d -is the unit number of the drive in question. Valid minimum command sizes -are 6 and 10. Any value above 6 will be rounded to 10, and any value below +is the unit number of the drive in question. +Valid minimum command sizes +are 6 and 10. +Any value above 6 will be rounded to 10, and any value below 6 will be rounded to 6. .Sh CHANGER OPERATION This driver has built-in support for LUN-based CD changers. |
