On Fri, 3 Mar 2006, Steve Byan wrote: > > On Mar 1, 2006, at 1:42 PM, Linus Torvalds wrote: > > > > I wouldn't expect it to. Most people use ATA for that, and it tends to > > have lower limits than most SCSI HBA's (well, at least the old PATA), so > > the change - if any - should at most change some of the sg.c limits to be > > no less than what SG_IO has had on ATA forever. > > > > Not that I expect people to have a SCSI CD/DVD drive anyway in this day > > and age, so the sg.c changes probably won't show up at all. > > CD-ROM support is a frequently-requested feature on the iSCSI Enterprise > Target (iet) email list. It won't be long before iSCSI CD and DVD devices > start showing up, although the underlying hardware will be ATAPI or else > missing entirely (i.e. ISO image file). Yes, but the point that the ATA limits tend to be on the low side still stands. For example, I think the IDE driver defaults to a maximum transfer of 256 sectors, and the same number of max scatter-gather entries. Some controllers will actually lower that, due to silly hw problems. The point being that it has worked fine for IDE, and if a SCSI controller has noticeably lower limits than that, there's something really strange going on, like a real bug. Linus - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
