3.3.5.1. Device Directories
Within each IDE channel directory is a device directory. The name of the device directory corresponds to the drive letter in the /dev/ directory. For instance, the first IDE drive on ide0 would be hda.
There is a symbolic link to each of these device directories in the /proc/ide/ directory.
Each device directory contains a collection of information and statistics. The contents of these directories vary according to the type of device connected. Some of the more useful files common to many devices include:
cache — The device cache.
capacity — The capacity of the device, in 512 byte blocks.
driver — The driver and version used to control the device.
geometry — The physical and logical geometry of the device.
media — The type of device, such as a disk.
model — The model name or number of the device.
settings — A collection of current device parameters. This file usually contains quite a bit of useful, technical information. A sample settings file for a standard IDE hard disk looks similar to the following:
name value min max mode ---- ----- --- --- ---- acoustic 0 0 254 rw address 0 0 2 rw bios_cyl 38752 0 65535 rw bios_head 16 0 255 rw bios_sect 63 0 63 rw bswap 0 0 1 r current_speed 68 0 70 rw failures 0 0 65535 rw init_speed 68 0 70 rw io_32bit 0 0 3 rw keepsettings 0 0 1 rw lun 0 0 7 rw max_failures 1 0 65535 rw multcount 16 0 16 rw nice1 1 0 1 rw nowerr 0 0 1 rw number 0 0 3 rw pio_mode write-only 0 255 w unmaskirq 0 0 1 rw using_dma 1 0 1 rw wcache 1 0 1 rw