On Tuesday 10 January 2017 15:29:23 Alan Stern wrote: > > Tom Yan wrote that smartctl/hdparm "works" because they use the SCSI ATA > > PASSTHROUGH command. It is not an option for kernel? > > No, because many devices do not implement SCSI ATA PASSTHROUGH. > (Consider devices whose underlying technology does not use ATA or SATA, > for example.) And some of the ones that don't implement it will die if > you try to send them an ATA PASSTHROUGH command. It is not possible to detect if underlaying device is ATA? > You have to understand that consumer USB storage really is very > low quality in many cases. Vendors aim for low cost rather than high > reliability or correctness. Understood. But lot of distributions call hdparm for inserted disks and also set some APM (or at least check it)... That means there is already some way how to deal with these problems (in userspace). -- Pali Rohár pali.rohar@xxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
