cd reader external

[Mikkel L. Ellertson]

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On 09/19/2012 04:46 PM, Rick Stevens wrote:
> On 09/19/2012 12:16 PM, Mikkel L. Ellertson uttered this comment:
>>
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>> On 09/19/2012 11:50 AM, Rick Stevens wrote:
>>> On 09/19/2012 05:18 AM, Patrick Dupre uttered this comment:
>>>> Hello,
>>>>
>>>> Can I use (mount?) a cd reader from another computer?
>>>> Both computers are on internet, In aother words can I do a
>>>> mount 122.255.988.10:/dev/cdrom or similar?
>>>
>>> Not really. You can ssh to the remote box, mount the media on the
>>> remote box, then export that mount from the remote box via NFS or
>> CIFS.
>>>
>>> On your local box, you'd mount the export from the remote box
>> using the
>>> appropriate mechanism (NFS or CIFS).
>> I wounder if ISCSI would let you do this?
>
> It would if the remote device was an iSCSI target and everything had
> been set up cleanly. Remember that iSCSI only offers up raw block
> devices. The mount of the remote device would have to know what
> filesystem type the remote device was. iSCSI can be confusing.
I was thinking the local system would take care of mounting the
device using SCSI commands over the network to access it as if it
were attached to the local machine. But I may be misunderstanding
what iSCSI does. I have not looked into it in depth.

It sounds like you know a lot more then I do about it. Would the
device ID from the remote device show that it is a CD/DVD drive?
Could the drive be handled the same way as an USB CD/DVD drive? But
using iSCSI instead of USB as the communication channel to the
drive? The same upper level drivers used for almost all CD/DVD
drives, with only the low level drivers changed to use iSCSI instead
of low level SCSI/ATA/USB to communicate with the drive?

What I am thinking of is that all the remote system would do is
handle the communications between the network and the physical
device driver, just like it handles communication between the
physical device driver and the high level SCSI drivers when you
access the device locally. Then on the local machine, the ISCSI
drivers would take the place of the physical device driver, and the
rest would be handled as if it were a local drive. The remote
machine would never have to know what file system is involved. It
would just pass commands and data between the network and the
device. (Start read at track x, sector y, and return z blocks of
data.) The remote machine would never mount the file system.

Mikkel
- -- 
Do not meddle in the affairs of dragons, for thou art crunchy and
taste good with Ketchup!
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