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horus
n00b
Joined: 09 Mar 2004
Posts: 64
Location: /dev/null
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 Posted: Fri Dec 02, 2005 1:23 pm Post subject: usb stick only works with fdisk |
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hi @ll
ive kind of a special problem 
when i plug in my usb stick, i cant mount it. i first have to run fdisk /dev/sda.
BEFORE fdisk /dev/sda
| Code: | usb 1-2: new high speed USB device using ehci_hcd and address 11
scsi7 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 11
usb-storage: waiting for device to settle before scanning
Vendor: Model: USB DRIVE Rev: 2.00
Type: Direct-Access ANSI SCSI revision: 02
sda: Unit Not Ready, sense:
: Current: sense key=0x6
ASC=0x28 ASCQ=0x0
sda : READ CAPACITY failed.
sda : status=1, message=00, host=0, driver=08
sd: Current: sense key=0x6
ASC=0x28 ASCQ=0x0
sda: test WP failed, assume Write Enabled
sda: assuming drive cache: write through
sda: Unit Not Ready, sense:
: Current: sense key=0x6
ASC=0x28 ASCQ=0x0
sda : READ CAPACITY failed.
sda : status=1, message=00, host=0, driver=08
sd: Current: sense key=0x6
ASC=0x28 ASCQ=0x0
sda: test WP failed, assume Write Enabled
sda: assuming drive cache: write through
sda: Unit Not Ready, sense:
: Current: sense key=0x6
ASC=0x28 ASCQ=0x0
sda : READ CAPACITY failed.
sda : status=1, message=00, host=0, driver=08
sd: Current: sense key=0x6
ASC=0x28 ASCQ=0x0
sda: test WP failed, assume Write Enabled
sda: assuming drive cache: write through
sda:end_request: I/O error, dev sda, sector 0
Buffer I/O error on device sda, logical block 0
Buffer I/O error on device sda, logical block 0
ldm_validate_partition_table(): Disk read failed.
Buffer I/O error on device sda, logical block 0
unable to read partition table
Attached scsi removable disk sda at scsi7, channel 0, id 0, lun 0
usb-storage: device scan complete
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AFTER fdisk /dev/sda
| Code: | Attached scsi removable disk sda at scsi7, channel 0, id 0, lun 0
usb-storage: device scan complete
SCSI device sda: 4075520 512-byte hdwr sectors (2087 MB)
sda: Write Protect is off
sda: Mode Sense: 03 00 00 00
sda: assuming drive cache: write through
SCSI device sda: 4075520 512-byte hdwr sectors (2087 MB)
sda: Write Protect is off
sda: Mode Sense: 03 00 00 00
sda: assuming drive cache: write through
sda: sda1
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now i can mount it.
why??
why doesnt it work without fdisk?
(fdisk isnt the only prog, if i try to mount /dev/sda2, an error occurs, but after that, sda1 appears and i can mount it)
thx 4 helping
horus
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badchien
Guru
Joined: 16 Feb 2004
Posts: 415
Location: doghouse
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| Posted: Fri Dec 02, 2005 9:59 pm Post subject: |
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That's because udev doesn't know about the partitions on the device until something tries to access it the first time.
If you create a udev rule for the device, use all_partitions option. It will create nodes corresponding to all possible partitions on the device.
| Code: | | NAME{all_partitions}="usbstick" |
That will get you /dev/usbstick, usbstick1, usbstick2, etc.
Alternatively you could setup Hal, D-Bus, pmount et al and let them handle this stuff for you. |
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Gentree
Watchman
Joined: 01 Jul 2003
Posts: 5350
Location: France, Old Europe
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| Posted: Mon Dec 05, 2005 3:43 pm Post subject: |
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I have a related problem but I dont even get a device name .
| Code: | bash-3.00#ls /dev/sd*
ls: /dev/sd*: No such file or directory
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I have sg0 and sr0 but they relate to my SCSI cdrom drive.
This is a new usb stick and I've never tried this before although I did test this kind of interface with a fujipix camera a few months back with no trouble.
I see nothing in dmesg nor in /var/log/messages that indicates anything even happened when I plugged the device in.
Am I mistaken about how all this works?
TIA 
{EDIT}
sorry forget that , I just plugged it into a usb onboard and I see it as sda . Looks like I need to speak to my pci usb card.
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