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RD(4)		      BSD/hp300 Kernel Interfaces Manual		 RD(4)

NAME
     rd — CS/80 disk interface

SYNOPSIS
     master hpib? at scode?
     disk rd? at hpib? slave?

DESCRIPTION
     This is a generic CS/80 disk driver.  Only a small number of possible
     CS/80 drives are supported, but others can easily be added by adding
     tables to the driver.  It is a typical block-device driver; see
     physio(4).

     The script MAKEDEV(8) should be used to create the rd special files; con‐
     sult mknod(8) if a special file needs to be made manually.

DISK SUPPORT
     The driver interrogates the controller to determine the type of drive
     attached.	The driver recognizes the following drives: 7912, 7914, 7933,
     7936, 7937, 7945, 757A/B, 7958A/B, 7959B, 7962, 7963, 9122, 9134, 7912,
     7936, and 9122, not all of which have been tested.	 Special file names
     begin with ‘rd’ and ‘rrd’ for the block and character files respectively.
     The second component of the name, a drive unit number in the range of
     zero to seven, is represented by a ‘’?  in the disk layouts below. The
     last component of the name is the file system partition and is designated
     by a letter from ‘a’ to ‘h’ which also corresponds to a minor device num‐
     ber sets: zero to seven, eight to 15, 16 to 23 and so forth for drive
     zero, drive two and drive three respectively (see physio 4 ) .  The loca‐
     tion and size (in sectors) of the partitions for these drives:

     7945/7946 partitions:
     disk      start	length	     cyls
	       rd?a	112	     15904     1-142
	       rd?b	16016	     20160     143-322
	       rd?c	0	     108416    0-967
	       rd?d	16016	     40320     143-502
	       rd?e	undefined
	       rd?f	undefined
	       rd?g	36176	     72240     323-967
	       rd?h	56336	     52080     503-967

     9134D partitions:
     disk      start	length	     cyls
	       rd?a	96	     15936     1-166
	       rd?b	16032	     13056     167-302
	       rd?c	0	     29088     0-302
	       rd?d	undefined
	       rd?e	undefined
	       rd?f	undefined
	       rd?g	undefined
	       rd?h	undefined

     9122S partitions:
     disk      start	length	     cyls
	       rd?a	undefined
	       rd?b	undefined
	       rd?c	0	     1232      0-76
	       rd?d	undefined
	       rd?e	undefined
	       rd?f	undefined
	       rd?g	undefined
	       rd?h	undefined

     7912P partitions:
     disk      start	length	     cyls
	       rd?a	0	     15904     0-70
	       rd?b	16128	     22400     72-171
	       rd?c	0	     128128    0-571
	       rd?d	16128	     42560     72-261
	       rd?e	undefined
	       rd?f	undefined
	       rd?g	38528	     89600     172-571
	       rd?h	58688	     69440     262-571

     7914CT/P partitions:
     disk      start	length	     cyls
	       rd?a	224	     15904     1-71
	       rd?b	16128	     40320     72-251
	       rd?c	0	     258048    0-1151
	       rd?d	16128	     64960     72-361
	       rd?e	81088	     98560     362-801
	       rd?f	179648	     78400     802-1151
	       rd?g	56448	     201600    252-1151
	       rd?h	81088	     176960    362-1151

     7958A partitions:
     disk      start	length	     cyls
	       rd?a	252	     16128     1-64
	       rd?b	16380	     32256     65-192
	       rd?c	0	     255276    0-1012
	       rd?d	16380	     48384     65-256
	       rd?e	64764	     100800    257-656
	       rd?f	165564	     89712     657-1012
	       rd?g	48636	     206640    193-1012
	       rd?h	64764	     190512    257-1012

     7957A partitions:
     disk      start	length	     cyls
	       rd?a	154	     16016     1-104
	       rd?b	16170	     24640     105-264
	       rd?c	0	     159544    0-1035
	       rd?d	16170	     42350     105-379
	       rd?e	58520	     54824     380-735
	       rd?f	113344	     46200     736-1035
	       rd?g	40810	     118734    265-1035
	       rd?h	58520	     101024    380-1035

     7933H partitions:
     disk      start	length	     cyls
	       rd?a	598	     16146     1-27
	       rd?b	16744	     66976     28-139
	       rd?c	0	     789958    0-1320
	       rd?d	83720	     16146     140-166
	       rd?e	99866	     165646    167-443
	       rd?f	265512	     165646    444-720
	       rd?g	83720	     706238    140-1320
	       rd?h	431158	     358800    721-1320

     9134L partitions:
     disk      start	length	     cyls
	       rd?a	80	     15920     1-199
	       rd?b	16000	     20000     200-449
	       rd?c	0	     77840     0-972
	       rd?d	16000	     32000     200-599
	       rd?e	undefined
	       rd?f	undefined
	       rd?g	36000	     41840     450-972
	       rd?h	48000	     29840     600-972

     7936H partitions:
     disk      start	length	     cyls
	       rd?a	861	     16359     1-19
	       rd?b	17220	     67158     20-97
	       rd?c	0	     600978    0-697
	       rd?d	84378	     16359     98-116
	       rd?e	100737	     120540    117-256
	       rd?f	220416	     120540    256-395
	       rd?g	84378	     516600    98-697
	       rd?h	341817	     259161    397-697

     7937H partitions:
     disk      start	length	     cyls
	       rd?a	1599	     15990     1-10
	       rd?b	17589	     67158     11-52
	       rd?c	0	     1116102   0-697
	       rd?d	84747	     15990     53-62
	       rd?e	100737	     246246    63-216
	       rd?f	346983	     246246    217-370
	       rd?g	84747	     1031355   53-697
	       rd?h	593229	     522873    371-697

     7957B/7961B partitions:
     disk      start	length	     cyls
	       rd?a	126	     16002     1-127
	       rd?b	16128	     32760     128-387
	       rd?c	0	     159894    0-1268
	       rd?d	16128	     49140     128-517
	       rd?e	65268	     50400     518-917
	       rd?f	115668	     44226     918-1268
	       rd?g	48888	     111006    388-1268
	       rd?h	65268	     94626     518-1268

     7958B/7962B partitions:
     disk      start	length	     cyls
	       rd?a	378	     16254     1-43
	       rd?b	16632	     32886     44-130
	       rd?c	0	     297108    0-785
	       rd?d	16632	     49140     44-173
	       rd?e	65772	     121716    174-495
	       rd?f	187488	     109620    496-785
	       rd?g	49518	     247590    131-785
	       rd?h	65772	     231336    174-785

     7959B/7963B partitions:
     disk      start	length	     cyls
	       rd?a	378	     16254     1-43
	       rd?b	16632	     49140     44-173
	       rd?c	0	     594216    0-1571
	       rd?d	16632	     65772     44-217
	       rd?e	82404	     303912    218-1021
	       rd?f	386316	     207900    1022-1571
	       rd?g	65772	     528444    174-1571
	       rd?h	82404	     511812    218-1571

     The eight partitions as given support four basic, non-overlapping lay‐
     outs, though not all partitions exist on all drive types.

     In the first layout there are three partitions and a ``bootblock'' area.
     The bootblock area is at the beginning of the disk and holds the stand‐
     alone disk boot program.  The rd?a partition is for the root file system,
     rd?b is a paging/swapping area, and rd?g is for everything else.

     The second layout is the same idea, but has a larger paging/swapping par‐
     tition (rd?d) and a smaller ``everything else'' partition (rd?h).	This
     layout is better for environments which run many large processes.

     The third layout is a variation of the second, but breaks the rd?h parti‐
     tion into two partitions, rd?e and rd?f.

     The final layout is intended for a large, single file system second disk.
     It is also used when writing out the boot program since it is the only
     partition mapping the bootblock area.

FILES
     /dev/rd[0-7][a-h]	 block files
     /dev/rrd[0-7][a-h]	 raw files

DIAGNOSTICS
     rd%d err: v%d u%d, R0x%x F0x%x A0x%x I0x%x, block %d  An unrecoverable
     data error occurred during transfer of the specified block on the speci‐
     fied disk.

BUGS
     The current disk partitioning is totally bogus.  CS/80 drives have 256
     byte sectors which are mapped to 512 byte ``sectors'' by the driver.
     Since some CS/80 drives have an odd number of sectors per cylinder, the
     disk geometry used is not always accurate.

     The partition tables for the file systems should be read off of each
     pack, as they are never quite what any single installation would prefer,
     and this would make packs more portable.

     A program to analyze the logged error information (even in its present
     reduced form) is needed.

BSD				 June 9, 1993				   BSD
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