On Sun, 23 Apr 2006, John O'Donnell wrote: > /* Some devices don't like MODE SENSE with page=0x3f, > * which is the command used for checking if a device > * is write-protected. Now that we tell the sd driver > * to do a 192-byte transfer with this command the > * majority of devices work fine, but a few still can't > * handle it. The sd driver will simply assume those > * devices are write-enabled. */ > /*if (us->flags & US_FL_NO_WP_DETECT)*/ > sdev->skip_ms_page_3f = 1; > > in drivers/usb/storage/scsiglue.c - comment out the "if"
Okay, makes sense. > Putting the code back in and compiling, unload, reload, connect device... > > USB Mass Storage support registered. > usb 1-6: new high speed USB device using ehci_hcd and address 61 > scsi43 : SCSI emulation for USB Mass Storage devices > usb-storage: device found at 61 > usb-storage: waiting for device to settle before scanning > Vendor: Generic Model: STORAGE DEVICE Rev: 9228 > Type: Direct-Access ANSI SCSI revision: 00 > SCSI device sde: 1984000 512-byte hdwr sectors (1016 MB) > sde: Write Protect is off > sde: Mode Sense: 03 00 00 00 > sde: assuming drive cache: write through > SCSI device sde: 1984000 512-byte hdwr sectors (1016 MB) > sde: Write Protect is off > sde: Mode Sense: 03 00 00 00 > sde: assuming drive cache: write through > sde: sde1 > sd 43:0:0:0: Attached scsi removable disk sde > sd 43:0:0:0: Attached scsi generic sg5 type 0 > usb-storage: device scan complete > > I cant explain it. All last night this wasnt working. I was tearing my hair > out. It works now. I uncommented the "if". I thought maybe it was my 512M > card fooling me so I tried the 1Gb one that was driving me nuts last night > and > it works. I tried removing the verbose debug. It still works. > > I popped out the card... > sde: Write Protect is on > It is now obeying the WP if I set it on the card. > I just took it back off... > It's all working?!?! > > I cant even begin to explain this. But if it fails again I will send a > message. Good enough. I'm glad removing the "sync" was all you needed to get things working again. Alan Stern ------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
