Red Hat LINUX 7.2 Reference Manual page 83

Section 4.3:Directories in /proc
DMA enabled:
UDMA enabled:
UDMA enabled:
UDMA
DMA
PIO
Navigating into the directory for an IDE channel, such as ide0 for the first channel, provides addi-
tional information. The channel file provides the channel number, while the model tells you the
bus type for the channel (such as pci).
Device Directories
Some of the most useful data can be found in the device directories within the channel directory. Each
device, such as a hard drive or CD-ROM, on that channel will have its own directory containing its
own 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 different devices include:
• cache — The device's 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 parameters of the device. This file usually contains quite a
bit of useful, technical information. A sample settings file for a standard IDE hard disk looks
similar to this:
name
----
bios_cyl
bios_head
bios_sect
breada_readahead
bswap
current_speed
file_readahead
ide_scsi
init_speed
io_32bit
keepsettings
lun
yes
yes
2
value
-----
784
255
63
4
0
66
0
0
66
0
0
0
no yes
no no
X X
min
---
0
0
0
0
0
0
0
0
0
0
0
0
max mode
--- ----
65535 rw
255 rw
63 rw
127 rw
1 r
69 rw
2097151 rw
1 rw
69 rw
3 rw
1 rw
7 rw
83
no
no
X