Stefan Richter wrote: > Brian King wrote: >> This is a resend of a patch I generated in response to an email sent >> by Ruben Faelens <parasietje@xxxxxxxxx>. His original email to >> linux-scsi requested a method in which he could spin down a scsi disk >> when not in use and have the kernel automatically spin it back up when >> an I/O was generated to the disk. The infrastructure to automatically >> spin a disk up has been in the scsi error handler for some time now, > > I am positively surprised that this code is actually already there --- I > didn't notice... > >> but it is not enabled by default. This patch adds an sd sysfs attribute >> which allows userspace to enable this behavior. > > What is the reason that the code is not enabled by default? Are there > dependencies on command set or transport, or firmwares which won't react > properly? There was concern when the patch went in that if it was enabled by default it would break a bunch of USB devices. http://marc.theaimsgroup.com/?l=linux-scsi&m=107702811830956&w=2 -- Brian King eServer Storage I/O IBM Linux Technology Center - : 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
