diff options
Diffstat (limited to 'handbook/scsi.sgml')
| -rw-r--r-- | handbook/scsi.sgml | 31 |
1 files changed, 13 insertions, 18 deletions
diff --git a/handbook/scsi.sgml b/handbook/scsi.sgml index 280483518e..f69478965b 100644 --- a/handbook/scsi.sgml +++ b/handbook/scsi.sgml @@ -1,4 +1,4 @@ -<!-- $Id: scsi.sgml,v 1.6 1995-10-07 04:31:46 jfieber Exp $ --> +<!-- $Id: scsi.sgml,v 1.7 1995-11-20 01:10:30 jfieber Exp $ --> <!-- The FreeBSD Documentation Project --> <!-- @@ -464,7 +464,7 @@ Feb 9 19:33:46 yedi /386bsd: sd0: 636MB (1303250 total sec), 1632 cyl, 15 head, The multi level design allows a decoupling of low-level bit banging and more high level stuff. Adding support for another - piece of hardware is a much more manageable problem. + piece of hardware is a much more managable problem. <sect2><heading>Kernel configuration</heading> <p> @@ -484,7 +484,7 @@ Feb 9 19:33:46 yedi /386bsd: sd0: 636MB (1303250 total sec), 1632 cyl, 15 head, system boot messages will be displayed to indicate whether the configured hardware was actually found. - An example based on the FreeBSD 2.0.5-Release kernel config + An example loosely based on the FreeBSD 2.0.5-Release kernel config file LINT with some added comments (between []): <verb> @@ -501,12 +501,6 @@ Feb 9 19:33:46 yedi /386bsd: sd0: 636MB (1303250 total sec), 1632 cyl, 15 head, # sea: Seagate ST01/02 8 bit controller (slow!) # wds: Western Digital WD7000 controller (no scatter/gather!). # -# Note that the order is important in order for Buslogic cards to be -# probed correctly. -# - -[For a Bustek controller] -controller bt0 at isa? port "IO_BT0" bio irq ? vector btintr [For an Adaptec AHA274x, 284x etc controller] controller ahc0 at isa? bio irq ? vector ahcintr # port??? iomem? @@ -514,29 +508,30 @@ controller ahc0 at isa? bio irq ? vector ahcintr # port??? iomem? [For an Adaptec AHA174x controller] controller ahb0 at isa? bio irq ? vector ahbintr -[For an Adaptec AHA154x controller] -controller aha0 at isa? port "IO_AHA0" bio irq ? drq 5 vector ahaintr - [For an Ultrastor adapter] controller uha0 at isa? port "IO_UHA0" bio irq ? drq 5 vector uhaintr -controller scbus0 #base SCSI code +# Map SCSI buses to specific SCSI adapters +controller scbus0 at ahc0 +controller scbus2 at ahb0 +controller scbus1 at uha0 +# The actual SCSI devices disk sd0 at scbus0 target 0 unit 0 [SCSI disk 0 is at scbus 0, LUN 0] disk sd1 at scbus0 target 1 [implicit LUN 0 if omitted] -disk sd2 at scbus0 target 3 -disk sd3 at scbus0 target 4 +disk sd2 at scbus1 target 3 [SCSI disk on the uha0] +disk sd3 at scbus2 target 4 [SCSI disk on the ahb0] tape st1 at scbus0 target 6 [SCSI tape at target 6] device cd0 at scbus? [the first ever CDROM found, no wiring] </verb> - The example above tells the kernel to look for a bt (Bustek) - controller, then for an Adaptec 274x, 284x etc board, and + The example above tells the kernel to look for a ahc (Adaptec 274x) + controller, then for an Adaptec 174x board, and so on. The lines following the controller specifications tell the kernel to configure specific devices but <em>only</em> attach them when they match the target ID and - LUN specified. + LUN specified on the corresponding bus. So, if you had a SCSI tape at target ID 2 it would not be configured, but it will attach when it is at target ID 6. |