Re: Disk simulator driver

Aboo Valappil
2006-10-30T12:42:52Z

Hi Sean,

I have posted some messages before with the subject "About SG Elements
of request_buffer" and "SCSITAP, Virtual SCSI HBA and user space SCSI
initiators". Can you please read them and tell me what you think?
I have exactly what you wanted, and other people in the email group
either said it is already there or not seems to be very much interested.

Basically, i built to impliment some user space SCSI engines and
initiators. If you want i can email you a working copy of it where you
can present the normal files as disks.

Aboo

Sean Bruno wrote:
> On Sun, 2006-10-29 at 17:02 -0600, Matt Domsch wrote:
>
>> On Sun, Oct 29, 2006 at 12:19:19PM -0800, Sean Bruno wrote:
>>
>>> Is there a project/driver that would take a disk/file/lvm partition as
>>> an argument(/dev/sda, /tmp/my_big_file.bin /dev/Mapper/MYLVMPART eg.)
>>> and then create a new /dev entry that could be read/written to as though
>>> it were a disk?
>>>
>>> I think I want to look at sg, but I wasn't sure if that is what I want.
>>>
>>> Just poking around for fun and education.
>>>
>>> Sean
>>>
>> You want something different than losetup and /dev/loop ?
>> e.g. something you can issue disk-like ioctls to?
>>
>>
> Precisely. I am interested in capturing the data that would be sent to
> the device and copying it somewhere before it is written to the disk.
> Kind of like the way target mode drivers accept a file/disk as a target
> for their operations.
>
> Sean
>
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