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Using "raw" command
- To: linux-il(at-nospam)cs.huji.ac.il
- Subject: Using "raw" command
- From: "Koski, Avi" <Avi.Koski(at-nospam)comverse.com>
- Date: Sun, 6 May 2001 13:28:09 +0300
- Sender: linux-il-bounce(at-nospam)cs.huji.ac.il
> Hi,
>
> I am trying to configure RAID, to be used as a raw device, on RedHat 6.2
> (Kernel 2.2-16).
>
> After building the /etc/raidtab file for raid-level 1, I defined several
> devices with the "mkraid" utility
> and right now there are several devices: /dev/md0, /dev/md1, ...
>
> In order to work with these devices as raw devices, I try to use the "raw"
> command.
>
> As specified in the SCSI HOWTO
> (http://www.linuxdoc.org/HOWTO/SCSI-2.4-HOWTO/rawdev.html)
> one uses this command as follows:
>
> $ raw /dev/raw/raw1 /dev/sda3
> /dev/raw/raw1: bound to major 8, minor 3
>
> However, trying to invoke such a command in my system fails, as follows:
>
> # raw /dev/raw/raw1 /dev/md1
> Cannot open master device 'dev/rawctl' (No such device).
>
> or
>
> # raw /dev/raw/raw6 /dev/sda6
> Cannot open master device 'dev/rawctl' (No such device).
>
> But - This file does exist!
>
> Any idea ? Have I missed any kernel option? If yes - which one?
>
> Thanks,
> Avi Koski
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