On Thu, 28 Aug 2003, Roe Peterson wrote: > These two patches make the NZ90 memory stick import work correctly as a > usb-storage > device under RedHat 8 running kernel 2.4.20-18.8. - and will probably > work under 2.4.20-20... > > nz90-usb-storage.patch: > - the NZ90 doesn't like seeing prevent/allow medium removal > commands, so I've just > stopped sending them. I should probably have a little more > smarts here (only skip them > when dealing with an NZ90), but I'm a bit lazy... and the NZ is > the only USB storage > device I have...
Does it identify itself (in its INQUIRY response) as having removeable media? If not, this is somewhat understandable -- the SCSI layer shouldn't send these commands to nonremoveable devices. I believe this has been fixed in 2.6. But if the NZ90 says the media _is_ removeable then it should be able to handle the PREVENT-ALLOW-MEDIUM-REMOVAL command. > - on the _very_first_ inquiry command after MS-import has > started, the NZ90 returns > Unit Attention, Check condition, Transition from not-ready to > ready. This (incorrectly, > IMHO) caused the transport system to lock the device. The patch > arranges for the INQUIRY > to always trigger a REQUEST SENSE, reading and clearing the > condition, and to ignore > the incorrect error status. That's a bug in the NZ90 -- INQUIRY is _not_ supposed to trigger Unit Attention (according to the SCSI-2 standard). On the other hand, if INQUIRY doesn't do it then some later command like READ-CAPACITY will. What do you mean, "caused the transport system to lock the device"? What is a locked NZ90 and how do you lock it? And what is the "transport system"? Do you just mean that the NZ90 stopped responding to USB messages? Alan Stern ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
