4.3BSD-UWisc/man/cat4/hp.4
HP(4) UNIX Programmer's Manual HP(4)
NAME
hp - MASSBUS disk interface
SYNOPSIS
disk hp0 at mba0 drive 0
DESCRIPTION
Files with minor device numbers 0 through 7 refer to various
portions of drive 0; minor devices 8 through 15 refer to
drive 1, etc. The standard device names begin with ``hp''
followed by the drive number and then a letter a-h for par-
titions 0-7 respectively. The character ? stands here for a
drive number in the range 0-7.
The block file's access the disk via the system's normal
buffering mechanism and may be read and written without
regard to physical disk records. There is also a `raw'
interface which provides for direct transmission between the
disk and the user's read or write buffer. A single read or
write call results in exactly one I/O operation and there-
fore raw I/O is considerably more efficient when many words
are transmitted. The names of the raw files conventionally
begin with an extra `r.'
In raw I/O counts should be a multiple of 512 bytes (a disk
sector). Likewise _s_e_e_k calls should specify a multiple of
512 bytes.
DISK SUPPORT
This driver handles both standard DEC controllers and Emulex
SC750 and SC780 controllers. Standard DEC drive types are
recognized according to the MASSBUS drive type register.
For the Emulex controller the drive type register should be
configured to indicate the drive is an RM02. When this is
encountered, the driver checks the holding register to find
out the disk geometry and, based on this information,
decides what the drive type is. The following disks are
supported: RM03, RM05, RP06, RM80, RP05, RP07, ML11A, ML11B,
CDC 9775, CDC 9730, AMPEX Capricorn (32 sectors/track),
FUJITSU Eagle (48 sectors/track), Fujitsu 2361, and AMPEX
9300. The origin and size (in sectors) of the pseudo-disks
on each drive are as follows:
RM03 partitions
disk start length cyls
hp?a 0 15884 0-99
hp?b 16000 33440 100-309
hp?c 0 131680 0-822
hp?d 49600 15884 309-408
hp?e 65440 55936 409-758
hp?f 121440 10080 759-822
hp?g 49600 82080 309-822
Printed 12/27/86 June 1, 1986 1
HP(4) UNIX Programmer's Manual HP(4)
RM05 partitions
disk start length cyls
hp?a 0 15884 0-26
hp?b 16416 33440 27-81
hp?c 0 500384 0-822
hp?d 341696 15884 562-588
hp?e 358112 55936 589-680
hp?f 414048 86176 681-822
hp?g 341696 158528 562-822
hp?h 49856 291346 82-561
RP06 partitions
disk start length cyls
hp?a 0 15884 0-37
hp?b 15884 33440 38-117
hp?c 0 340670 0-814
hp?d 49324 15884 118-155
hp?e 65208 55936 156-289
hp?f 121220 219296 290-814
hp?g 49324 291192 118-814
RM80 partitions
disk start length cyls
hp?a 0 15884 0-36
hp?b 16058 33440 37-114
hp?c 0 242606 0-558
hp?d 49910 15884 115-151
hp?e 68096 55936 152-280
hp?f 125888 120466 281-558
hp?g 49910 192510 115-558
RP05 partitions
disk start length cyls
hp?a 0 15884 0-37
hp?b 15884 33440 38-117
hp?c 0 171798 0-410
hp?d 2242 15884 118-155
hp?e 65208 55936 156-289
hp?f 121220 50424 290-410
hp?g 2242 122320 118-410
RP07 partitions
disk start length cyls
hp?a 0 15884 0-9
hp?b 16000 66880 10-51
hp?c 0 1008000 0-629
hp?d 376000 15884 235-244
hp?e 392000 307200 245-436
hp?f 699200 308600 437-629
hp?g 376000 631800 235-629
hp?h 83200 291346 52-234
Printed 12/27/86 June 1, 1986 2
HP(4) UNIX Programmer's Manual HP(4)
CDC 9775 partitions
disk start length cyls
hp?a 0 15884 0-12
hp?b 16640 66880 13-65
hp?c 0 1077760 0-841
hp?d 376320 15884 294-306
hp?e 392960 307200 307-546
hp?f 700160 377440 547-841
hp?g 376320 701280 294-841
hp?h 84480 291346 66-293
CDC 9730 partitions
disk start length cyls
hp?a 0 15884 0-49
hp?b 16000 33440 50-154
hp?c 0 263360 0-822
hp?d 49600 15884 155-204
hp?e 65600 55936 205-379
hp?f 121600 141600 380-822
hp?g 49600 213600 155-822
AMPEX Capricorn partitions
disk start length cyls
hp?a 0 15884 0-31
hp?b 16384 33440 32-97
hp?c 0 524288 0-1023
hp?d 342016 15884 668-699
hp?e 358400 55936 700-809
hp?f 414720 109408 810-1023
hp?g 342016 182112 668-1023
hp?h 50176 291346 98-667
FUJITSU Eagle partitions
disk start length cyls
hp?a 0 15884 0-16
hp?b 16320 66880 17-86
hp?c 0 808320 0-841
hp?d 375360 15884 391-407
hp?e 391680 55936 408-727
hp?f 698880 109248 728-841
hp?g 375360 432768 391-841
hp?h 83520 291346 87-390
FUJITSU 2361 partitions
disk start length cyls
hp?a 0 15884 0-12
hp?b 16640 66880 13-65
hp?c 0 1077760 0-841
hp?d 376320 15884 294-306
hp?e 392960 307200 307-546
hp?f 700160 377408 547-841
hp?g 363520 701248 294-841
Printed 12/27/86 June 1, 1986 3
HP(4) UNIX Programmer's Manual HP(4)
hp?h 84480 291346 66-293
AMPEX 9300 partitions
disk start length cyl
hp?a 0 15884 0-26
hp?b 16416 33440 27-81
hp?c 0 495520 0-814
hp?d 341696 15884 562-588
hp?e 358112 55936 589-680
hp?f 414048 81312 681-814
hp?g 341696 153664 562-814
hp?h 49856 291346 82-561
It is unwise for all of these files to be present in one
installation, since there is overlap in addresses and pro-
tection becomes a sticky matter. The hp?a partition is nor-
mally used for the root file system, the hp?b partition as a
paging area, and the hp?c partition for pack-pack copying
(it maps the entire disk). On disks larger than about 205
Megabytes, the hp?h partition is inserted prior to the hp?d
or hp?g partition; the hp?g partition then maps the
remainder of the pack. All disk partition tables are calcu-
lated using the _d_i_s_k_p_a_r_t(8) program.
FILES
/dev/hp[0-7][a-h] block files
/dev/rhp[0-7][a-h] raw files
SEE ALSO
hk(4), uda(4), up(4)
DIAGNOSTICS
hp%d%c: hard error sn%d mbsr=%b er1=%b er2=%b. An unrecov-
erable error occurred during transfer of the specified sec-
tor of the specified disk partition. The MASSBUS status
register is printed in hexadecimal and with the error bits
decoded if any error bits other than MBEXC and DTABT are
set. In any case the contents of the two error registers
are also printed in octal and symbolically with bits
decoded. (Note that er2 is what old rp06 manuals would call
er3; the terminology is that of the rm disks). The error
was either unrecoverable, or a large number of retry
attempts (including offset positioning and drive recalibra-
tion) could not recover the error.
hp%d: write locked. The write protect switch was set on the
drive when a write was attempted. The write operation is
not recoverable.
hp%d: not ready. The drive was spun down or off line when
it was accessed. The I/O operation is not recoverable.
Printed 12/27/86 June 1, 1986 4
HP(4) UNIX Programmer's Manual HP(4)
hp%d%c: soft ecc sn%d. A recoverable ECC error occurred on
the specified sector of the specified disk partition. This
happens normally a few times a week. If it happens more
frequently than this the sectors where the errors are occur-
ring should be checked to see if certain cylinders on the
pack, spots on the carriage of the drive or heads are indi-
cated.
During autoconfiguration one of the following messages may
appear on the console indicating the appropriate drive type
was recognized. The last message indicates the drive is of
a unknown type.
hp%d: 9775 (direct).
hp%d: 9730 (direct).
hp%d: 9300.
hp%d: 9762.
hp%d: capricorn.
hp%d: eagle.
hp%d: 2361.
hp%d: ntracks %d, nsectors %d: unknown device.
BUGS
In raw I/O _r_e_a_d and _w_r_i_t_e(2) truncate file offsets to 512-
byte block boundaries, and _w_r_i_t_e scribbles on the tail of
incomplete blocks. Thus, in programs that are likely to
access raw devices, _r_e_a_d, _w_r_i_t_e and _l_s_e_e_k(2) should always
deal in 512-byte multiples.
DEC-standard error logging should be supported.
A program to analyze the logged error information (even in
its present reduced form) is needed.
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.
Printed 12/27/86 June 1, 1986 5