topic Re: raw device in Operating System - Linux

raw device

Nobody's Hero — Thu, 17 Jul 2003 12:58:39 GMT

If my disk assignments are sda and sdb.
How do I find out the raw device for these disks.

Re: raw device

Claudio Cilloni — Thu, 17 Jul 2003 13:08:36 GMT

they should be /dev/sda and /dev/sdb.

ciao
Claudio

Re: raw device

Nobody's Hero — Thu, 17 Jul 2003 13:23:18 GMT

In HPUX for sda, the raw device would be rsda.
I see a /dev/raw directory with devices listed in it.

so for disk /dev/sda, the raw device is the same?

Re: raw device

Claudio Cilloni — Thu, 17 Jul 2003 13:31:23 GMT

the /dev/raw directory only lists raw* devices. mmmh... I don't what they are used for. And I never used them.

/dev/sda and /dev/sdb are the block devices for your hard disks (this is shown by the leftmost 'b' in the output of 'ls -l /dev/sd*'). If you are looking for the character devices, I don't know if they exist for scsi disks. Linux has a different management of raw/character devices than hpux.

I always used the block devices of my IDE drive partitions. Try with /dev/sda and /dev/sdb, I think they will work.

hth
Claudio

Re: raw device

Caesar_3 — Thu, 17 Jul 2003 19:57:06 GMT

Hello!

I'm not shure that you have the raw devices
for sda & sdb, why you need them in linux?

Caesar

Re: raw device

Charles Holland — Fri, 18 Jul 2003 13:23:17 GMT

Robert,
Running SuSE in my shop. In /etc there is a file called raw which contains a list of how the raw device driver knows where to access the information in our Informix database.

Example out of that file...
# sample configuration to bind raw devices
# to block devices
# The format of this file is:
# raw:
# example:
# ---------
# raw1:hdb1
#
# this means: bind /dev/raw1 to /dev/hdb1
raw1:vg02/PD10lvol01

Under /informix/SMS/sapdata/physdev10 we have a link data01 -> /dev/raw1

Don't know if this will help.... maybe point you in the right direction