Help needed regarding BlockDevices in /proc/devices file

[karthik537]

Hi friendz...

Below is the information regarding Block Devices in /proc/devices file in my linux pc

Block devices:
1 ramdisk
259 blkext
7 loop
8 sd
9 md
11 sr
65 sd
66 sd
67 sd
68 sd
69 sd
70 sd
71 sd
128 sd
129 sd
130 sd
131 sd
132 sd
133 sd
134 sd
135 sd
253 device-mapper
254 mdp


In that info, first number is the major number and I came to know that the IDE HDD will be having the major number 3 and SCSI disks will be having the major numbers 8, 65, 66, 67, 68, 69, 70 and 71(From the Internet Information). If I consider the entry "8 sd" as the SCSI HDD because /proc/partitions file is having the partition info of thd SCSI HDD with major number 8, then wat about the remainign entries with name "sd". But physically I can see only one HDD in my CPU Cabinet. Please help me in this asap.

[Rubberman]

What exactly are you trying to find out? Reading stuff in /proc is really only for system gurus who need to really peer into the guts of the running system.

[karthik537]

I want to know the no of hard disks attached in the linux system.

[Rubberman]

I want to know the no of hard disks attached in the linux system.

Try

ls /dev/sd? | wc -w

for the number of hard drives. For more information about partitions (file systems and other block-special stuff, like swap) try

ls /dev/sd*

and for raw data, look at /proc/diskstats.

You can also (as root) execute the command "fdisk -l" to get a full listing of all the hard drives and partitions on the system.