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Home > Archive > alt.os.linux > June 2002 > /dev/??
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| Can someone please tell me how devices get named at boot-up? Or better
yet, could someone offer an explanation to the following situation? I
have 2 optical devices, one is a dvd-rom, the other is a cd-rw. The
first one is listed as /dev/hdc or /dev/cdrom. Both of which are links
to /dev/ide/host0/bus1/target0/lun0/cd. However, the second one is
listed as /dev/cdrom1 and /dev/scd0 which are links to
/dev/cdroms/cdrom1 and /dev/scsi/host0/bus0/target0/lun0/cd. This makes
me very curious because it isn't a scsi device (i don't have scsi) and
it is on the same bus as the first drive. Both drives work perfectly
regardless of which block device name I use, but I'd like to know why
the second drive is listed as a scsi device. Thanks for any replies.
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| Armin Krawinkel 2002-06-24, 7:14 pm |
| Jona wrote:
> Can someone please tell me how devices get named at boot-up? Or better
> yet, could someone offer an explanation to the following situation? I
> have 2 optical devices, one is a dvd-rom, the other is a cd-rw. The
> first one is listed as /dev/hdc or /dev/cdrom. Both of which are links
> to /dev/ide/host0/bus1/target0/lun0/cd. However, the second one is
> listed as /dev/cdrom1 and /dev/scd0 which are links to
> /dev/cdroms/cdrom1 and /dev/scsi/host0/bus0/target0/lun0/cd. This makes
> me very curious because it isn't a scsi device (i don't have scsi) and
> it is on the same bus as the first drive. Both drives work perfectly
> regardless of which block device name I use, but I'd like to know why
> the second drive is listed as a scsi device. Thanks for any replies.
you have ide-scsi emulation enabled. google the web for that ( or was it
scsi-ide? )
you will find it 
--
Rgds, Armin
Take a look at ==> http://www.dtch.org
if u have a minute or two...
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| SrBueno 2002-06-24, 7:14 pm |
| Armin Krawinkel wrote:
> Jona wrote:
>
>> Can someone please tell me how devices get named at boot-up? Or better
>> yet, could someone offer an explanation to the following situation? I
>> have 2 optical devices, one is a dvd-rom, the other is a cd-rw. The
>> first one is listed as /dev/hdc or /dev/cdrom. Both of which are links
>> to /dev/ide/host0/bus1/target0/lun0/cd. However, the second one is
>> listed as /dev/cdrom1 and /dev/scd0 which are links to
>> /dev/cdroms/cdrom1 and /dev/scsi/host0/bus0/target0/lun0/cd. This makes
>> me very curious because it isn't a scsi device (i don't have scsi) and
>> it is on the same bus as the first drive. Both drives work perfectly
>> regardless of which block device name I use, but I'd like to know why
>> the second drive is listed as a scsi device. Thanks for any replies.
>
> you have ide-scsi emulation enabled. google the web for that ( or was it
> scsi-ide? )
> you will find it
>
And without ide-scsi emulation you will NOT be able to write to the CD-RW.
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