linux-kernel - Re: 2.6.25: usb-storage unknown partition table issue

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Message-ID: <15577be70805191220h4413a9c1n11d7240a2906e056@mail.gmail.com>
Date:	Mon, 19 May 2008 21:20:26 +0200
From:	"Abel Bernabeu" <abel.bernabeu@...il.com>
To:	patrizio.bassi@...il.com
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.25: usb-storage unknown partition table issue

Looks like you did not enable the partition type "PC BIOS".

Type "make menuconfig" and make sure you enabled it on:

Partition types / Advanced partition / pc bios (ms dos partition tables)

Discard any SCSI issue, indeed I am almost sure you can do a "cp
/dev/sda /dev/null" with no problem (showing that your SCSI driver is
working properly).

Yours, Abel.



2008/5/19 Patrizio Bassi <patrizio.bassi@...il.com>:
> Hi,
>
> i have a 8GB usb pen with several problem due to partition table.
>
> if i create a primary one with fdisk, then format it works ok.
> then i umount it, unplug, replug, no more partition detected.
>
> I formatted it on Windows (same machine) and this some stress test, but it's
> brand new and it works.
> The partition and the free space is correctly seen by qtparted and parted,
> but in the dmesg i see:
>
> Initializing USB Mass Storage driver...
> scsi10 : SCSI emulation for USB Mass Storage devices
> usb-storage: device found at 2
> usb-storage: waiting for device to settle before scanning
> usbcore: registered new interface driver usb-storage
> USB Mass Storage support registered.
> usb-storage: device scan complete
> scsi 10:0:0:0: Direct-Access     Ut165    USB2FlashStorage 0.00 PQ: 0 ANSI:
> 2
> sd 10:0:0:0: [sdc] 15794176 512-byte hardware sectors (8087 MB)
> sd 10:0:0:0: [sdc] Write Protect is off
> sd 10:0:0:0: [sdc] Mode Sense: 00 00 00 00
> sd 10:0:0:0: [sdc] Assuming drive cache: write through
> sd 10:0:0:0: [sdc] 15794176 512-byte hardware sectors (8087 MB)
> sd 10:0:0:0: [sdc] Write Protect is off
> sd 10:0:0:0: [sdc] Mode Sense: 00 00 00 00
> sd 10:0:0:0: [sdc] Assuming drive cache: write through
> sdc: unknown partition table
> sd 10:0:0:0: [sdc] Attached SCSI removable disk
>
> This makes the partition unasable in my linux 2.6.25 (vanilla) system.
> Another 1gb usbpen works perfectly.
>
> Bus 004 Device 001: ID 1d6b:0001
> Bus 005 Device 001: ID 1d6b:0001
> Bus 002 Device 001: ID 1d6b:0001
> Bus 003 Device 001: ID 1d6b:0001
> Bus 001 Device 002: ID 1307:0165 Transcend Information, Inc.
> Bus 001 Device 001: ID 1d6b:0002
>
> Anything i can try?
> It looks a scsi issue. And it's the first time i see the Mode Sense set to 0
> for any usb storage device.
>
> Please CC me i'm not subscribed
>
> --
> Patrizio Bassi
> www.patriziobassi.it
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