On Thu, 14 Oct 2004, Ganesan R wrote: > Thanks for the info. As I mentioned, the enclosure works flawlessly for > me under 2.4.27. It's getting detected incorrectly only in 2.6.x. > Another user reported a similar problem but was able to get dvd burning > working by removing the checks from the writing tool. So, it looks like > detection has been messed up only in 2.6.x. > > Once again, 2.6.8 reports it as > > ====== > scsi3 : SCSI emulation for USB Mass Storage devices > Vendor: Revoltec Model: USB/IDE Bridge ( Rev: 0103 > Type: Direct-Access ANSI SCSI revision: 02 > Attached scsi removable disk sdb at scsi3, channel 0, id 0, lun 0 > ====== > > whereas 2.4.27 correctly reports > > ======== > scsi2 : SCSI emulation for USB Mass Storage > Vendor: _NEC Model: DVD_RW ND-2500A > Type: CD-ROM ANSI SCSI revision: 02 > Attached scsi CD-ROM sr1 at scsi2, channel 0, id 0, lun 0 > sr1: scsi-1 drive > USB Mass Storage support registered. > ======== > > I checked the kernel sources. Sure enough, > drivers/usb/storage/unusual_devs.h > has a new entry in the 2.6 tree: > > ======== > /* <[EMAIL PROTECTED]>: I don't know the name of the bridge > * manufacturer, but I've got an external USB drive by the Revoltec company > * that needs this. otherwise the drive is recognized as /dev/sda, but any > * access to it blocks indefinitely. > */ > UNUSUAL_DEV( 0x0402, 0x5621, 0x0103, 0x0103, > "Revoltec", > "USB/IDE Bridge (ATA/ATAPI)", > US_SC_DEVICE, US_PR_DEVICE, NULL, US_FL_FIX_INQUIRY), > ======== > > I have not yet tested after removing this entry, but this looks to be > the likely problem. The enclosure actually supports both 3.5 IDE hard > disks as well as 5.25 CD/DVD drives. I have no clue why this entry > should cause the drive to be wrongly detected. CCing linux-usb-devel for > help.
Certainly that entry is the problem. It has been removed in the latest development kernels; it may already be gone in 2.6.9-rc4. Alan Stern ------------------------------------------------------- This SF.net email is sponsored by: IT Product Guide on ITManagersJournal Use IT products in your business? Tell us what you think of them. Give us Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more http://productguide.itmanagersjournal.com/guidepromo.tmpl _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
