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From: xspirix on 23 Nov 2006 19:07
Hi
I have a sonyvaio (sz2m/b) on which I have successfully installed
slackware 11. Everything went fine except that I cannot mount my memory
stick duo. From the dmesg I can see that the driver is recognized by
the kernel (2.6.18.1):

Vendor: Sony Model: USB HS-CARD Rev: 4.52
Type: Direct-Access ANSI SCSI revision: 00
sd 2:0:0:0: Attached scsi removable disk sdb
sd 2:0:0:0: Attached scsi generic sg1 type 0
usb-storage: device scan complete

It seems that it does not create the sdb1 device (sda is the sata hard
disk for this laptop). I have tried also sdb and sg1 but it complaints
about the filesystem type (even using the option -t). usb-storage and
scsi related is built-in the kernel. Any help? probably udev issue ..?
Thanks in advance
Regards
andrea

From: Eef Hartman on 24 Nov 2006 03:19
xspirix <andrea.spitaleri(a)gmail.com> wrote:
> Hi
> I have a sonyvaio (sz2m/b) on which I have successfully installed
> slackware 11. Everything went fine except that I cannot mount my memory
> stick duo. From the dmesg I can see that the driver is recognized by
> the kernel (2.6.18.1):
>
> Vendor: Sony Model: USB HS-CARD Rev: 4.52
> Type: Direct-Access ANSI SCSI revision: 00
> sd 2:0:0:0: Attached scsi removable disk sdb
> sd 2:0:0:0: Attached scsi generic sg1 type 0
> usb-storage: device scan complete

It doesn't give a line like:
sdb: sdb1
or
sdb: unknown partition table
(the first when the MBR contains a partition table, the second when it has been
formatted as "superfloppy", so with the BOOT block on the place of the MBR).
Then it probably doesn't recognize the MBR (Master Boot Record, the first
block OF the device). That one should _either_ contain a partition table
(with at least one partition) or a boot block - like a floppy does).
What does "fdisk -l /dev/sdb" say?

udev will only create sdb1 if:
1) a valid partition table has been recognized ON the sdb device and
2) that partition table contains an entry for partition 1

PS: I've reformatted my own memory stick to be "super-floppy" format, with
vfat (fat32) file system), so my "dmesg" will give the 2nd line (2.6 kernel,
the message in 2.4 was different) when recognizing my stick:
sdb: unknown partition table
as the boot block is NOT a valid partition table, and I have to mount the
stick as /dev/sdb with vfat file system (PS: this is NOT the default, msdos
normally precedes vfat).
--
********************************************************************
** Eef Hartman, Delft University of Technology, dept. EWI/TW **
** e-mail: E.J.M.Hartman(a)math.tudelft.nl, fax: +31-15-278 7295 **
** snail-mail: P.O. Box 5031, 2600 GA Delft, The Netherlands **
********************************************************************
From: xspirix on 24 Nov 2006 05:16
> What does "fdisk -l /dev/sdb" say?
nothing ...
without -l it says unable to open sdb (i am doing as root). however I
created the device sdb1 with the command mknod sdb1 b 8 1 and I
mounted it. I looked to this dir and there were data used from the sony
to re-install the system in case of failure (some kind of hide
partition since i cannot see even from windows). that is strange
because the log says something different:

less /proc/scsi/usb-storage/2 :
Host scsi2: usb-storage
Vendor: Sony
Product: UMH-U09
Serial Number: F00000127325
Protocol: Transparent SCSI
Transport: Bulk
Quirks:
and /dev/disk/by-id gives :

lrwxrwxrwx 1 root root 9 2006-11-24 10:02
usb-Sony_USB_HS-CARD_F00000127325 -> ../../sdb
lrwxrwxrwx 1 root root 9 2006-11-24 11:02 scsi-1ATA_ST98823AS_3PK ->
.../../sda
lrwxrwxrwx 1 root root 10 2006-11-24 11:02
scsi-1ATA_ST98823AS_3PK-part3 -> ../../sda3
lrwxrwxrwx 1 root root 10 2006-11-24 11:02
scsi-1ATA_ST98823AS_3PK-part6 -> ../../sda6
lrwxrwxrwx 1 root root 10 2006-11-24 11:02
scsi-1ATA_ST98823AS_3PK-part7 -> ../../sda7
lrwxrwxrwx 1 root root 10 2006-11-24 11:02
scsi-1ATA_ST98823AS_3PK-part5 -> ../../sda5
lrwxrwxrwx 1 root root 10 2006-11-24 11:02
scsi-1ATA_ST98823AS_3PK-part9 -> ../../sda9
lrwxrwxrwx 1 root root 10 2006-11-24 11:02
scsi-1ATA_ST98823AS_3PK-part2 -> ../../sda2
lrwxrwxrwx 1 root root 10 2006-11-24 11:02
scsi-1ATA_ST98823AS_3PK-part8 -> ../../sda8
lrwxrwxrwx 1 root root 10 2006-11-24 11:02
scsi-1ATA_ST98823AS_3PK-part1 -> ../../sda1

so it seems that sdb is the memory stick.
Last (sorry for the long post) I paste my dmesg:
......
Initializing USB Mass Storage driver...
scsi2 : SCSI emulation for USB Mass Storage devices
usbcore: registered new driver usb-storage
USB Mass Storage support registered.
usb-storage: device found at 2
usb-storage: waiting for device to settle before scanning
..............
Vendor: Sony Model: USB HS-CARD Rev: 4.52
Type: Direct-Access ANSI SCSI revision: 00
sd 2:0:0:0: Attached scsi removable disk sdb
sd 2:0:0:0: Attached scsi generic sg1 type 0
usb-storage: device scan complete
...................

mount sg0 or sg1 says :
mount: sg0 (sg1) is not a block device
thanks for the help

andrea

From: Kees Theunissen on 24 Nov 2006 06:02
xspirix wrote:
>> What does "fdisk -l /dev/sdb" say?
> nothing ...
> without -l it says unable to open sdb (i am doing as root). however I
> created the device sdb1 with the command mknod sdb1 b 8 1 and I
> mounted it. I looked to this dir and there were data used from the sony
> to re-install the system in case of failure (some kind of hide
> partition since i cannot see even from windows). that is strange
> because the log says something different:

You were looking at the first (hidden) partition of your hard disk.
The name /dev/sdb1 is not used at all to select a disk or partition.
The device type (block), major device number (8) and minor device
number (1) is all that matters. And block device major 8 minor 1 is
/dev/sda1

See /usr/src/linux/Documentation/devices.txt:

8 block SCSI disk devices (0-15)
0 = /dev/sda First SCSI disk whole disk
16 = /dev/sdb Second SCSI disk whole disk
32 = /dev/sdc Third SCSI disk whole disk
...
240 = /dev/sdp Sixteenth SCSI disk whole disk

Partitions are handled in the same way as for IDE
disks (see major number 3) except that the limit on
partitions is 15.

For /dev/sdb use minor 16, for /dev/sdb1 use minor 17, .....
But it should not be needed to do this manually.


Regards,

Kees.

--
Kees Theunissen.
From: Eef Hartman on 24 Nov 2006 06:23
xspirix <andrea.spitaleri(a)gmail.com> wrote:
> mount sg0 or sg1 says :
> mount: sg0 (sg1) is not a block device

No, sg (Scsi General) is a CHAR-type device, meant for low-level
device control (like controlling tapes or CD-roms), the mountable device
_should_ be either sdb (super-floppy format) or sdbX with X the partition
number.
But according to your dmesg the kernel doesn't recognize your
memory stick as a "disk like" device, because it doesn't seem to
read the MBR (as said before, it should give a message about
sdb: <partitions>
to show that it DID try to read the MBR.

If the MBR is valid it SHOULD give such a message, so at the moment
it seems that THIS memory stick is not usable with Linux (it is a
kernel thing, not distribution dependant).

This is what dmesg shows on my (Dane-Elec 2 GB, reformatted by myself) stick:
usb 1-6: new high speed USB device using ehci_hcd and address 16
usb 1-6: configuration #1 chosen from 1 choice
scsi10 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 16
usb-storage: waiting for device to settle before scanning
Vendor: Dane-Elec Model: USB DRIVE Rev: 2.00
Type: Direct-Access ANSI SCSI revision: 02
ready
SCSI device sdb: 4075520 512-byte hdwr sectors (2087 MB)
sdb: Write Protect is off
sdb: Mode Sense: 03 00 00 00
sdb: assuming drive cache: write through
sdb: sdb1
sd 10:0:0:0: Attached scsi removable disk sdb
sd 10:0:0:0: Attached scsi generic sg4 type 0
usb-storage: device scan complete

This is with a 2.6 kernel, it will be a bit different with 2.4.*

Note that it mentions sector and total size and the MBR info.

My older (Genie, 512MB) "super-floppy" stick gives:
usb 1-6: new high speed USB device using ehci_hcd and address 17
usb 1-6: configuration #1 chosen from 1 choice
hub 1-6:1.0: USB hub found
hub 1-6:1.0: 1 port detected
usb 1-6.1: new high speed USB device using ehci_hcd and address 18
usb 1-6.1: configuration #1 chosen from 1 choice
scsi11 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 18
usb-storage: waiting for device to settle before scanning
Vendor: USB 2.0 Model: Flash Disk Rev: PROL
Type: Direct-Access ANSI SCSI revision: 00
SCSI device sdb: 1024000 512-byte hdwr sectors (524 MB)
sdb: Write Protect is off
sdb: Mode Sense: 00 06 00 00
sdb: assuming drive cache: write through
sdb: unknown partition table
sd 11:0:0:0: Attached scsi removable disk sdb
sd 11:0:0:0: Attached scsi generic sg4 type 0
usb-storage: device scan complete
--
********************************************************************
** Eef Hartman, Delft University of Technology, dept. EWI/TW **
** e-mail: E.J.M.Hartman(a)math.tudelft.nl, fax: +31-15-278 7295 **
** snail-mail: P.O. Box 5031, 2600 GA Delft, The Netherlands **
********************************************************************
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