Bug 160976 - mount -o rw /media/usbdisk mounts readonly for legend 1GB usb 2.0 mini flashdrive
mount -o rw /media/usbdisk mounts readonly for legend 1GB usb 2.0 mini flashd...
Status: CLOSED NOTABUG
Product: Fedora
Classification: Fedora
Component: util-linux (Show other bugs)
3
i686 Linux
medium Severity medium
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Assigned To: Karel Zak
Ben Levenson
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Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2005-06-19 08:19 EDT by simon shields
Modified: 2007-11-30 17:11 EST (History)
0 users

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Environment:
Last Closed: 2005-09-08 06:46:57 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description simon shields 2005-06-19 08:19:08 EDT
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.8) Gecko/20050513 Fedora/1.0.4-1.3.1 Firefox/1.0.4

Description of problem:
When I insert 1GB legend usbdisk, dmesg reports sda : READ CAPACITY(16) failed. and sda: Write Protect is on, so I can't write to usbdisk. 

[root@sstusc sshields]# mount
/dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw)
none on /proc type proc (rw)
none on /sys type sysfs (rw)
none on /dev/pts type devpts (rw,gid=5,mode=620)
usbfs on /proc/bus/usb type usbfs (rw)
/dev/hda1 on /boot type ext3 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
none on /dev/shm type tmpfs (rw,size=528m)
/dev/sda1 on /media/usbdisk type vfat (ro,nosuid,nodev,sync,noatime,iocharset=utf8,fscontext=system_u:object_r:removable_t)

[root@sstusc sshields]# cp /etc/hosts /media/usbdisk
cp: cannot create regular file `/media/usbdisk/hosts': Read-only file system

[root@sstusc sshields]# umount /media/usbdisk
[root@sstusc sshields]# mount -o rw /media/usbdisk
mount: block device /dev/sda1 is write-protected, mounting read-only

/etc/sysconfig/hwconf entry for usb-storage is
class: HD
bus: USB
detached: 0
driver: usb-storage
desc: "USB Storage"
usbclass: 8
usbsubclass: 6
usbprotocol: 50
usbbus: 1
usblevel: 1
usbport: 0
usbdev: 110
vendorId: 05e3
deviceId: 0704
usbprod: USB Storage

dmesg output for usb-storage reports

usb 1-1: new high speed USB device using ehci_hcd and address 112
scsi5 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 112
usb-storage: waiting for device to settle before scanning
  Vendor: Generic   Model: STORAGE DEVICE    Rev: 2258
  Type:   Direct-Access                      ANSI SCSI revision: 00
sda : very big device. try to use READ CAPACITY(16).
sda : READ CAPACITY(16) failed.
sda : status=0, message=00, host=5, driver=00
sda : use 0xffffffff as device size
SCSI device sda: 4294967296 512-byte hdwr sectors (2199023 MB)
sda: Write Protect is on
sda: Mode Sense: 02 00 80 00
sda: assuming drive cache: write through
sda : very big device. try to use READ CAPACITY(16).
sda : READ CAPACITY(16) failed.
sda : status=0, message=00, host=5, driver=00
sda : use 0xffffffff as device size
SCSI device sda: 4294967296 512-byte hdwr sectors (2199023 MB)
sda: Write Protect is on
sda: Mode Sense: 02 00 80 00
sda: assuming drive cache: write through
 sda: sda1
Attached scsi removable disk sda at scsi5, channel 0, id 0, lun 0
usb-storage: device scan complete

uname -r
2.6.11-1.27_FC3

uname -a
Linux sstusc 2.6.11-1.27_FC3 #1 Tue May 17 20:27:37 EDT 2005 i686 i686 i386 GNU/Linux


Version-Release number of selected component (if applicable):
version 2.12a release 24.2

How reproducible:
Always

Steps to Reproduce:
1. insert legend 1GB flash drive into usb slot
2. cp /etc/hosts /media/usbdisk

  

Actual Results:  Error reports
cp: cannot create regular file `/media/usbdisk/hosts': Read-only file system

Expected Results:  The file /etc/hosts should have appeared in /media/usbdisk

Additional info:

dmesg output in description above
/etc/sysconfig/hwconf entry for usb-storage is in description

mount -o rw /media/usbdisk error message in description above
Comment 1 Karel Zak 2005-06-21 08:46:26 EDT
Why do you expect that the mount should be attach your device read-write when
kernel provides it as "read-only"? dmesg:

   sda: Write Protect is on

Please, are you really sure that you don't use any HW write protection on your
USB disk?
  

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