Re: usb storage not a block device ???

[Andrey Borzenkov <arvidjaar@mail.ru>]

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On Saturday 21 January 2006 11:14, G.ridolfi wrote:
> Data: 20/01/06 19:55 Moshe Yudkowsky
>
> > Giovanni Ridolfi
> >
> > > I cannot find any  << SUBSYSTEM="block" >> in what the kernel reads
> > >
> > > :-(
> > >
> > > # udevinfo -a -p
> >
> > I suggest you "modprobe usb_storage" and then see if you get "block."
>
> # modprobe usb_storage
> # dmesg
> Initializing USB Mass Storage driver...
> usbcore: registered new driver usb-storage
> USB Mass Storage support registered.
> usb 4-1: new high speed USB device using ehci_hcd and address 3
> scsi0 : SCSI emulation for USB Mass Storage devices
> usb-storage: device found at 3
> usb-storage: waiting for device to settle before scanning
>

And now you have to load sd_mod that is missing in lsmod output you sent 
earlier. Once upon a time it was done by hotplug. I do not know if Gentoo is 
still using hotplug or converted hotplug rules to udev. In the latter case we 
(Mandriva community) found a bug that SCSI subsystem requires wait_for_sysfs 
otherwise it cannot probe device type and does not load proper module. I,e, 
from current udev rules here:

# disks & magneto-optical disk:
ACTION="add", SUBSYSTEM="scsi", WAIT_FOR_SYSFS="type", SYSFS{type}="[07]", 
\
              RUN+="/sbin/modprobe sd_mod"

> However /dev/muvo is created but...
> #ls -l
> crw-rw-r-- 1 root root  189, 387 2006-01-21 08:49 /dev/muvoTXFM
>
> Still is not a block device.
[...]
> # udevinfo -a -p /sys/devices/pci0001\:10/0001\:10\:1b.2/usb4/4-1/4-1\:1.0/
>

Irrelevant. This is created by usbhid. If you want to rename (that I strongly 
NOT recommend) or give alias to your USB stick your old rule should work, use 
SYMLINK

SYSFS{product}="MuVo TX FM", SYMLINK+="muvoTXFM", KERNEL="sd*"

BTW with your all rule you will never see /dev/sda at all because you change 
the name from default to custom.

Also udev already creates persistent (are they really BTW?) rules for you:

{pts/1}% LC_ALL=C ll /dev/disk/by-id
total 0
lrwxrwxrwx  1 root root  9 Jan 21 11:12 ata-IC25N020ATDA04-0_63A63GY1081 
- -> ../../hda
lrwxrwxrwx  1 root root 10 Jan 21 11:12 ata-IC25N020ATDA04-0_63A63GY1081-part1 
- -> ../../hda1
lrwxrwxrwx  1 root root 10 Jan 21 11:12 ata-IC25N020ATDA04-0_63A63GY1081-part2 
- -> ../../hda2
lrwxrwxrwx  1 root root  9 Jan 21 11:12 usb-USB_128MB_241F41AFDD0D006D 
- -> ../../sda
lrwxrwxrwx  1 root root 10 Jan 21 11:12 usb-USB_128MB_241F41AFDD0D006D-part1 
- -> ../../sda1

may be you just can use them?

- -andrey
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