On Sun, 1 Oct 2006, Kai Makisara wrote: > On Sat, 30 Sep 2006, Guennadi Liakhovetski wrote: > > > Kai, as st maintainer, you surely know - on my tape HP C1533A I cannot > > seem to set up any block size other than 1 byte... Is it __really__ 1 byte > > or is it just some fixed block size that the drive doesn't report and > > cannot change? And it means I cannot test setting of different block > > sizes? I have a (unconnected ATM) slightly newer C1555D, wonder if that > > could use different block sizes?... > > > This is interesting. I also have HP C1533A (firmware 9608) and I have not > had any problems with setting the block size. Dmesg shows that the drive > supports blocks up to 1<<24 - 1 bytes: > st0: Block limits 1 - 16777215 bytes. > > I just tested with kernel 2.6.18 that setting block size works in my > system. I must have done something wrong yesterday. Sorry. It does work indeed, tested with mt -f /dev/st0 setblk `expr $bs \* 1024` time tar cf /dev/st0 -b `expr $bs \* 2` *jp* mt -f /dev/st0 status I can set block size as high as 512k (.max_sectors defaulting to 1024) independent of .use_clustering. Only setting .max_sectors higher lets one use larger blocks. Thanks Guennadi --- Guennadi Liakhovetski - To unsubscribe from this list: 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
