Redirected to misc@, as it's more appropriate there.
On Mon, Apr 28, 2008 at 07:27:23AM -0700, xing93111 wrote:
| Hi,
|
| I use sysctl hw.disknames command on my openBSD system, the system says:
| hw.disknames=rd0. What does this means? I also saw other posts in this
| forum, their hw.disknames may be wd0, cd0, etc. What do these mean, rd0,
| wd0, cd0?
Look up the respective manpages of these. `man rd`, `man wd`, `man
cd`, and `man sd` will tell you plenty. Basically, these are different
types of disks that can be used by your machine. When the system
boots, it probes the hardware and enumerates all (usable) types of
storage it finds. hw.disknames then lists these.
A couple of examples :
hw.disknames=sd0,sd1,cd0
hw.disknames=sd0,sd1,cd0,sd2
hw.disknames=wd0,wd1,wd2,wd3
sd are disks find behind a SCSI(-like) bus. The first example are
actual SCSI disks, in the second example, sd0 and sd1 are SATA disks
(they live behind an AHCI controller) and sd2 is a USB disk.
cd are CD-ROM drives (or CD-R, CD-RW, DVD, etc). I think these are
quite obvious.
wd are basically IDE drives.
rd is a ramdisk, most commonly found in install kernels (bsd.rd etc).
Read the manpages for these (all in section 4) for more details.
Cheers,
Paul 'WEiRD' de Weerd
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