Windows PowerShell command on Get-command dumpdates

Manual Pages for UNIX Operating System command usage for man dumpdates

File Formats ufsdump(4)

NAME

ufsdump, dumpdates - incremental dump format

SYNOPSIS

#include

/etc/dumpdates

DESCRIPTION

Tapes used by ufsdump(1M) and ufsrestore(1M) contain: o a header record o two groups of bit map records o a group of records describing directories o a group of records describing files The format of the header record and the format of the first record of each description in the include file are:

#define TP_BSIZE_MAX 65536

#define TP_BSIZE_MIN 1024

#define ESIZE_SHIFT_MAX 6

#ifdef SUPPORTS_MTB_TAPE_FORMAT

#define TP_BUFSIZE TP_BSIZE_MAX

#else

#define TP_BSIZE 1024

#define TP_BUFSIZE TP_BSIZE

#endif /* SUPPORTS_MTB_TAPE_FORMAT */

#define NTREC 10

#define HIGHDENSITYTREC 32

#define CARTRIDGETREC 63

#define TP_NINDIR (TP_BSIZE_MIN/2)

#define TP_NINOS (TP_NINDIR / sizeof (long))

#define LBLSIZE 16

#define NAMELEN 64

#define OFS_MAGIC (int)60011

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File Formats ufsdump(4)

#define NFS_MAGIC (int)60012

#define MTB_MAGIC (int)60013

#define CHECKSUM (int)84446

union u_data {

char s_addrs[TP_NINDIR];

int32_t s_inos[TP_NINOS];

};

union u_shadow {

struct s_nonsh {

int32_t c_level;

char c_filesys[NAMELEN];

char c_dev[NAMELEN];

char c_host[NAMELEN];

} c_nonsh;

char c_shadow[1];

};

union u_spcl {

char dummy[TP_BUFSIZE];

struct s_spcl {

int32_t c_type;

time32_t c_date;

time32_t c_ddate;

int32_t c_volume;

daddr32_t c_tapea;

ino32_t c_inumber;

int32_t c_magic;

int32_t c_checksum;

struct dinode c_dinode;

int32_t c_count;

union u_data c_data;

char c_label[LBLSIZE];

union u_shadow c_shadow;

int32_t c_flags;

int32_t c_firstrec;

#ifdef SUPPORTS_MTB_TAPE_FORMAT

int32_t c_tpbsize;

int32_t c_spare[31];

#else

int32_t c_spare[32];

#endif /* SUPPORTS_MTB_TAPE_FORMAT */

} s_spcl;

} u_spcl;

int32_t c_type;

time32_t c_date;

time32_t c_ddate;

int32_t c_volume;

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File Formats ufsdump(4)

daddr32_t c_tapea;

ino32_t c_inumber;

int32_t c_magic;

int32_t c_checksum;

struct dinode c_dinode;

int32_t c_count;

union u_data c_data;

char c_label[LBLSIZE];

union u_shadow c_shadow;

int32_t c_flags;

int32_t c_firstrec;

#ifdef SUPPORTS_MTB_TAPE_FORMAT

int32_t c_tpbsize;

int32_t c_spare[31];

#else

int32_t c_spare[32];

#endif /*

SUPPORTS_MTB_TAPE_FORMAT */

} s_spcl;

} u_spcl;

#define spcl u_spcl.s_spcl

#define c_addr c_data.s_addrs

#define c_inos c_data.s_inos

#define c_level c_shadow.c_nonsh.c_level

#define c_filesys c_shadow.c_nonsh.c_filesys

#define c_dev c_shadow.c_nonsh.c_dev

#define c_host c_shadow.c_nonsh.c_host

#define TS_TAPE 1

#define TS_INODE 2

#define TS_ADDR 4

#define TS_BITS 3

#define TS_CLRI 6

#define TS_END 5

#define TS_EOM 7

#define DR_NEWHEADER 1

#define DR_INODEINFO 2

#define DR_REDUMP 4

#define DR_TRUEINC 8

#define DR_HASMETA 16

This header describes three formats for the ufsdump/ufsrestore interface:

o An old format, non-MTB, that supports dump sizes of

less than 2 terabytes. This format is represented

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File Formats ufsdump(4)

by NFS_MAGIC.

o A new format, MTB, that supports dump sizes of greater than 2 terabytes using a variable block

size and 2 new constants: TP_BSIZE_MIN and

TP_BSIZE_MAX. This format is represented by

MTB_MAGIC.

o A much older format that might be found on existing backup tapes. The ufsrestore command can restore tapes of this format, but no longer generates tapes of this format. Backups in this format have the

OFS_MAGIC magic number in their tape headers.

The constants are described as follows:

TP_BSIZE Size of file blocks on the dump tapes

for the old format. Note that TP_BSIZE

must be a multiple of DEV_BSIZE This is

applicable for dumps of type NFS_MAGIC

or OFS_MAGIC, but is not applicable for

dumps of type MTB_MAGIC.

TP_BSIZE_MIN Minimum size of file blocks on the dump

tapes for the new MTB format (MTB_MAGIC)

only.

TP_BSIZE_MAX Maximum size of file blocks on the dump

tapes for the new MTB format (MTB_MAGIC)

only.

NTREC Number of TP_BSIZE blocks that are writ-

ten in each tape record.

HIGHDENSITYNTREC Number of TP_BSIZE blocks that are writ-

ten in each tape record on 6250 BPI or higher density tapes.

CARTRIDGETREC Number of TP_BSIZE blocks that are writ-

ten in each tape record on cartridge tapes.

TP_NINDIR Number of indirect pointers in a

TS_INODE or TS_ADDR record. It must be a

power of 2.

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File Formats ufsdump(4)

TP_NINOS The maximum number of volumes on a tape.

LBLSIZE The maximum size of a volume label.

NAMELEN The maximum size of a host's name.

OFS_MAGIC Magic number that is used for the very

old format.

NFS_MAGIC Magic number that is used for the non-

MTB format.

MTB_MAGIC Magic number that is used for the MTB

format. CHECKSUM Header records checksum to this value.

The TS_ entries are used in the c_type field to indicate

what sort of header this is. The types and their meanings are as follows:

TS_TAPE Tape volume label.

TS_INODE A file or directory follows. The c_dinode field

is a copy of the disk inode and contains bits telling what sort of file this is.

TS_ADDR A subrecord of a file description. See s_addrs

below.

TS_BITS A bit map follows. This bit map has a one bit

for each inode that was dumped.

TS_CLRI A bit map follows. This bit map contains a zero

bit for all inodes that were empty on the file system when dumped.

TS_END End of tape record.

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File Formats ufsdump(4)

TS_EOM diskette EOMindicates that the restore is com-

patible with old dump The flags are described as follows:

DR_NEWHEADER New format tape header.

DR_INFODEINFO Header contains starting inode info.

DR_REDUMP Dump contains recopies of active files.

DR_TRUEINC Dump is a "true incremental".

DR_HASMETA The metadata in this header.

DUMPOUTFMT Name, incon, and ctime (date) for printf. DUMPINFMT Inverse for scanf. The fields of the header structure are as follows:

s_addrs An array of bytes describing the blocks of

the dumped file. A byte is zero if the block associated with that byte was not present on the file system; otherwise, the

byte is non-zero. If the block was not

present on the file lsystem, no block was dumped; the block will be stored as a

hole in the file. If there is not suffi-

cient space in this record to describe all

the blocks in a file, TS_ADDR records will

be scattered through the file, each one picking up where the last left off

s_inos The starting inodes on tape.

c_type The type of the record.

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File Formats ufsdump(4)

c_date The date of the previous dump.

c_ddate The date of this dump.

c_volume The current volume number of the dump.

c_tapea The logical block of this record.

c_inumber The number of the inode being dumped if

this is of type TS_INODE.

c_magic This contains the value MAGIC above, trun-

cated as needed.

c_checksum This contains whatever value is needed to

make the record sum to CHECKSUM.

c_dinode This is a copy of the inode as it appears

on the file system.

c_count The count of bytes in s_addrs.

u_data c_data The union of either u_data c_data The

union of either s_addrs or s_inos.

c_label Label for this dump.

c_level Level of this dump.

c_filesys Name of dumped file system.

c_dev Name of dumped service.

c_host Name of dumped host.

c_flags Additional information.

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File Formats ufsdump(4)

c_firstrec First record on volume.

c_spare Reserved for future uses.

c_tpbsize Tape block size for MTB format only.

Each volume except the last ends with a tapemark (read as an

end of file). The last volume ends with a TS_END record and

then the tapemark.

The dump history is kept in the file /etc/dumpdates. It is

an ASCII file with three fields separated by white space: o The name of the device on which the dumped file system resides. o The level number of the dump tape; see ufsdump(1M).

o The date of the incremental dump in the format gen-

erated by ctime(3C). DUMPOUTFMT is the format to use when using printf(3C) to

write an entry to /etc/dumpdates; DUMPINFMT is the format to

use when using scanf(3C) to read an entry from

/etc/dumpdates.

ATTRIBUTES

See attributes(5) for a description of the following attri-

butes:

____________________________________________________________

| ATTRIBUTE TYPE | ATTRIBUTE VALUE |

|_____________________________|_____________________________|

| Interface Stability | Uncommitted |

|_____________________________|_____________________________|

Manual Pages for UNIX Operating System command usage for man dumpdates

NAME

ufsdump, dumpdates - incremental dump format

SYNOPSIS

/etc/dumpdates

DESCRIPTION

#define NAMELEN 64

char c_filesys[NAMELEN];

char c_dev[NAMELEN];

char c_host[NAMELEN];

NAMELEN The maximum size of a host's name.

The dump history is kept in the file /etc/dumpdates. It is

write an entry to /etc/dumpdates; DUMPINFMT is the format to

/etc/dumpdates.

ATTRIBUTES

| ATTRIBUTE TYPE | ATTRIBUTE VALUE |

SEE ALSO