[talk] help with sd0 target for dd on netbsd

[fire crow]

On Tue, Aug 9, 2016 at 4:07 AM, Sujit K M <kmsujit at gmail.com> wrote:
> On Tue, Aug 9, 2016 at 9:25 AM, fire crow <fire at firecrow.com> wrote:
>> Hi,
>> Does anyone know how to get access to a usb disk directly in NebBSD,
>> not just going through the subpartitions. I'm trying to create
>> bootable media with dd, and it seams like i can only get ahold of the
>> partitions, e.g dev/sd0a, sd0b... etc, as apposed to the main
>> /dev/sd0.
>>
>>
>> it appears the sd0 target does not exist in /dev, or the MAKEDEV
>> makefile. however there is a usb target that doesn't seam to respond
>> to mount.
>>
>> here are some command line results to give an idea of things I've tried.
>>
>> $ dmesg | grep sd0
>> sd0 at scsibus0 target 0 lun 0: disk removable
>> sd0: 29812 MB, 60571 cyl, 16 head, 63 sec, 512 bytes/sect x 61056064 sectors
>>
>> but ls /dev | grep sd0 is not present
>
> I donot think there is any /dev/sd0, i.e /dev/sd0a is the device.
> Try lsusb:- run it without device and then run it with the device you
> will get the device.
> Please mount the device and you can access.
>
> https://www.freebsd.org/cgi/man.cgi?query=lsusb&sektion=8&manpath=freebsd-release-ports

It appears that lsusb does not come standard with NetBSD, looking into
getting that set up now...

>> $ mount -t cd9660 /dev/usb /mnt
>> mount_cd9660: /dev/usb on /mnt Block device required
>>
>> $ mount -t cd9660 /dev/sd0a /mnt
>> mount_cd9660: /dev/sd0a on /mnt: Device not configured
>
> Check whether /dev/sd0a is the actual device.
>
>>
>> However I can mount the first partition of an sdcard
>>
>> $ dmesg | grep sd1
>> sd1 at scsibus1 target 0 lun 0: disk removable
>> sd1: fabricating a geometry
>> sd1: 7640 MB, 7640 cyl, 64 head, 32 sec, 512 bytes/sect x 15646720 sectors
>> sd1: fabricating a geometry
>>
>> $ mount /dev/sd1a /mnt
>                 ^^^^^^^^^
>
> You are mounting as I have illustrated previously in the email that
> you have mount
> the device. Please find it highlighted.
>
>>
>> All help appreciated, heres to bootable images on usbs!
>>
>> ~fire
>>
>> _______________________________________________
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>
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-- 
fire crow : fire at firecrow.com +1.917.306.9451