Hi all I've got a problem report and a patch from John Adams, he says tmscsim driver under 2.6.17 and on doesn't allow him to read tapes with blocksize of 1MB. He fixes this with the below patch. On Sun, 24 Sep 2006, John Adams wrote: > --- drivers/scsi/tmscsim.c.bak 2006-09-24 12:55:08.000000000 -0400 > +++ drivers/scsi/tmscsim.c 2006-09-24 12:55:56.000000000 -0400 > @@ -2300,7 +2300,8 @@ > .this_id = 7, > .sg_tablesize = SG_ALL, > .cmd_per_lun = 1, > - .use_clustering = DISABLE_CLUSTERING, > + .use_clustering = ENABLE_CLUSTERING, > + .max_sectors = 2048, > }; > > /*********************************************************************** It looks like 1) use_clustering doesn't directly affect maximum block size, so, he doesn't really need it, although, it might make sense for tmscsim to improve performance. 2) max_sectors is indeed what he needs, but it looks strange that now it has to be set by the low-level driver... For block devices you can set it at run time with /sys/block/sda/queue/max_sectors_kb, right? But what about tapes? Sorry, didn't find too much documentation about it. 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
