Tony Heskett wrote: I'll let someone from the iscsi target team answer your first question, but an answer about Xen and tape at the bottom ...
> Hi there, > > I was hoping to provide a couple of (very old) tape drives > to my Xen VM clients, by making the drives visible as iSCSI targets. > > Unfortunately: > > bash-3.2# iscsitadm create target --type raw --backing-store /dev/rmt/0 rmt0 > iscsitadm: Error Backing store is not valid raw device > > bash-3.2# mt -f /dev/rmt/0 status > Exabyte EXB-8500 8mm Helical Scan tape drive: > sense key(0x5)= Illegal Request residual= 0 retries= 0 > file no= 0 block no= 0 > bash-3.2# uname -a > SunOS ultra10b 5.11 snv_79a sun4u sparc SUNW,Ultra-5_10 > bash-3.2# > > Sending a 'rewind' clears that Illegal Request status [again], btw: > bash-3.2# mt -f /dev/rmt/0 rewind > bash-3.2# mt -f /dev/rmt/0 status > Exabyte EXB-8500 8mm Helical Scan tape drive: > sense key(0x0)= No Additional Sense residual= 0 retries= 0 > file no= 0 block no= 0 > bash-3.2# > > iscsitadm create target --type raw --size 2G --backing-store /dev/rmt/0 rmt0 > gives just the same error, so the problem isn't just from guessing > the tape "size". > > Xen's running on Ubuntu 7.10 (patched with the latest open-iscsi, > to fix Ubuntu's iscsi login kernel panic..) and linux can fdisk, etc., > iscsi disk targets from the Solaris box; so iscsi's happy both ends. > > The tape drives work fine locally (tar cvf, tvf, etc.) from Solaris. > > I'm guessing the "change the daemon" comment in this next > post still applies; anyone confirm, please ? > http://osdir.com/ml/os.solaris.opensolaris.storage.general/2006-12/msg00056.html > > Finally, if I can't make targets of the tapedrives using Solaris, > any other OS pointers / great ideas, to present tapedrives under Xen ? > I think IET on Linux allowed this, but I'd have to go back a couple > OS revs to get it to compile, so I'm not hugely keen... > There's some work in the Xen community to add a SCSI passthrough driver. This would allow you do SCSI passthrough to locally attached tape drives. Last I checked, a couple weeks ago, it was still going through review. More information on xen.org developer mailing list, search for pvSCSI. > Thanks for reading, > Tony > > > This message posted from opensolaris.org > _______________________________________________ > storage-discuss mailing list > [email protected] > http://mail.opensolaris.org/mailman/listinfo/storage-discuss -- Aaron Dailey Staff Engineer, Sun Microsystems x82025 http://blogs.sun.com/aarondailey _______________________________________________ storage-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/storage-discuss
