Net2/usr/src/share/man/man4/man4.vax/hp.4
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.\" @(#)hp.4 6.5 (Berkeley) 3/27/91
.\"
.Dd March 27, 1991
.Dt HP 4 vax
.Os BSD 4
.Sh NAME
.Nm hp
.Nd
.Tn MASSBUS
disk interface
.Sh SYNOPSIS
.Cd "disk hp0 at mba0 drive 0"
.Sh DESCRIPTION
The
.Nm hp
driver
is a generic Massbus disk driver which handles both the standard
.Tn DEC
controllers and the Emulex
.Tn SC750
and
.Tn SC780
controllers.
It is typical of a block-device disk driver; block
.Tn I/O
is
described in
.Xr physio 4 .
.Pp
The script
.Xr MAKEDEV 8
should be used to create the special files; if a special file
needs to be created by hand consult
.Xr mknod 8 .
It is recommended as a security precaution to not create special files
for devices which may never be installed.
.Pp
The first sector of each disk contains both a first-stage bootstrap program
and a disk label containing geometry information and partition layouts (see
.Xr disklabel 5 .
This sector is normally write-protected, and disk-to-disk copies should
avoid copying this sector.
The label may be updated with
.Xr disklabel 8 ,
which can also be used to write-enable and write-disable the sector.
The next 15 sectors contain a second-stage bootstrap program.
.Sh DISK SUPPORT
This driver handles both standard
.Tn DEC
controllers and Emulex
.Tn SC750
and
.Tn SC780
controllers.
During autoconfiguration or whenever a drive comes on line for the first time,
or when a drive is opened after all partitions are closed,
the first sector of the drive is examined for a disk label.
If a label is found, the geometry of the drive and the partition tables
are taken from it.
If no label is found,
standard
.Tn DEC
drive types are
recognized according to the
.Tn MASSBUS
drive type register,
and default partitions are used.
For the Emulex controller the drive type register should be configured
to indicate the drive is an
.Tn 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.
.Pp
Special file names begin with
.Sq Li hp
and
.Sq Li rhp
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
.Sq Li ?
in the disk layouts below.
The last component is the file system partition
designated
by a letter from
.Sq Li a
to
.Sq Li h
and also corresponds to a minor device number set: zero to seven,
eight to 15, 16 to 23 and so forth for drive zero, drive two and drive
three respectively.
The following disks are supported:
.Tn RM03 ,
.Tn RM05 ,
.Tn RP06 ,
.Tn RM80 ,
.Tn RP05 ,
.Tn RP07 ,
.Tn ML11A ,
.Tn ML11B ,
.Tn CDC 9775 ,
.Tn CDC 9730 ,
.Tn AMPEX
Capricorn (32 sectors/track),
.Tn FUJITSU
Eagle (48 sectors/track),
.Tn FUJITSU 2361,
and
.Tn AMPEX
9300. The default layout and size (in sectors) of the
partitions for these drives:
.Bl -column header diskx undefined length
.Tn RM03 No partitions
.Sy 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
.Tn RM05 No partitions
.Sy 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
.Tn RP06 No partitions
.Sy 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
.Tn RM80 No partitions
.Sy 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
.Tn RP05 No partitions
.Sy 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
.Tn RP07 No partitions
.Sy 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
.Tn CDC No 9775 partitions
.Sy 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
.Tn CDC No 9730 partitions
.Sy 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
.Tn AMPEX No Capricorn partitions
.Sy 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
.Tn FUJITSU No Eagle partitions
.Sy 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
.Tn FUJITSU No 2361 partitions
.Sy 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
hp?h 84480 291346 66-293
.Tn AMPEX No 9300 partitions
.Sy 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
.El
.Pp
The hp?a partition is normally 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 calculated using the
.Xr diskpart 8
program.
.Pp
.Sh FILES
.Bl -tag -width /dev/rhp[0-7][a-h] -compact
.It Pa /dev/hp[0-7][a-h]
block files
.It Pa /dev/rhp[0-7][a-h]
raw files
.El
.Sh DIAGNOSTICS
.Bl -diag
.It "hp%d%c: hard error %sing fsbn %d [of %d-%d] (hp%d bn %d cn %d tn %d sn %d) mbsr=%b er1=%b er2=%b."
An unrecoverable error occurred during transfer of the specified
filesystem block number,
which is a logical block number on the indicated partition.
If the transfer involved multiple blocks, the block range is printed as well.
The parenthesized fields list the actual disk sector number
relative to the beginning of the drive,
as well as the cylinder, track and sector number of the block.
The
.Tn MASSBUS
status register is printed in hexadecimal and
with the error bits decoded if any error bits other than
.Tn MBEXC
and
.Tn 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
.Tn RP06
manuals would call
.Tn RPER3 ;
the terminology
is that of the
.Tn RM
disks).
The error was either unrecoverable, or a large number of retry attempts
(including offset positioning and drive recalibration) could not
recover the error.
.Pp
.It hp%d: write locked.
The write protect switch was set on the drive
when a write was attempted. The write operation is not recoverable.
.Pp
.It hp%d: not ready .
The drive was spun down or off line when it was
accessed. The
.Tn I/O
operation is not recoverable.
.Pp
.It "hp%d%c: soft ecc reading fsbn %d [of %d-%d] (hp%d bn %d cn %d tn %d sn %d)."
A recoverable
.Tn ECC
error occurred on the
specified sector of the specified disk partition.
If the transfer involved multiple blocks, the block range is printed as well.
The parenthesized fields list the actual disk sector number
relative to the beginning of the drive,
as well as the cylinder, track and sector number of the block.
This happens normally
a few times a week. If it happens more frequently than
this the sectors where the errors are occurring should be checked to see
if certain cylinders on the pack, spots on the carriage of the drive
or heads are indicated.
.Pp
.It hp%d: 9775 (direct).
.It hp%d: 9730 (direct).
.It hp%d: 9300.
.It hp%d: 9762.
.It hp%d: capricorn.
.It hp%d: eagle.
.It hp%d: 2361.
.It hp%d: ntracks %d, nsectors %d: unknown device.
During autoconfiguration one of the above messages may appear
on the console indicating the appropriate drive type was recognized.
The last message indicates the drive is of a unknown type.
In this case, the correct geometry is set, and one partition is created
that contains the entire drive.
.Pp
.El
.Sh SEE ALSO
.Xr physio 4 ,
.Xr up 4 ,
.Xr disklabel 5 ,
.Xr MAKEDEV 8
.Xr disklabel 8
.Xr mknod 8
.Sh HISTORY
The
.Nm
driver appeared in
.Bx 4.0 .
.Sh BUGS
.Tn DEC Ns -standard
error logging should be supported.
.Pp
A program to analyze the logged error information (even in its
present reduced form) is needed.