_PHATVOL Struct Reference
[Volume Support]

#include <phatvol.h>

Collaboration diagram for _PHATVOL:

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Detailed Description

Volume info structure.

Data Fields
int	vol_type
	Type of volume.
u_long	vol_numfree
	Number of free clusters.
u_long	vol_nxtfree
	Possibly next free cluster.
PHATSECTBUF	vol_buf [1]
	Sector buffer of this volume.
HANDLE	vol_fsmutex
	Mutual exclusion filesystem access semaphore.
HANDLE	vol_iomutex
	Mutual exclusion I/O semaphore.
u_int	vol_sectsz
	Bytes per sector.
u_int	vol_clustsz
	Sectors per cluster.
u_long	vol_tabsz
	Number of sectors per allocation table.
u_long	vol_tab_sect [2]
	First sector of each allocation table.
u_int	vol_rootsz
	Number of sectors used by the root directory.
u_long	vol_root_sect
	First sector of the root directory.
u_long	vol_root_clust
	First cluster of the root directory.
u_long	vol_last_clust
	Last data cluster number.
u_long	vol_data_sect
	First data sector.

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Field Documentation

int _PHATVOL::vol_type

Type of volume. Either 12, 16 or 32.

u_long _PHATVOL::vol_tab_sect[2]

First sector of each allocation table. We maintain upto two allocation tables.

u_long _PHATVOL::vol_last_clust

Last data cluster number. The first cluster number is 2, so this value is equal to the total number of data clusters plus 2.

u_long _PHATVOL::vol_data_sect

First data sector. The first sector following the root directory.

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