Darrick J. Wong wrote: > Tejun Heo wrote: >> sd doesn't stop (unload head) on shutdown. This behavior is necessary >> for multi initiator cases. Unloading head by powering off stresses >> the drive and sometimes produces distinct clunking noise which >> apparently disturbs users considering multiple reports on different >> distributions. halt(8) usually puts the drives to sleep prior to >> shutdown but the implementation is fragile and it doesn't work with >> sleep-to-disk. > > I wonder if this sort of thing (cache flush + spin down) is the sort of > thing that ought to be done to near-line storage at suspend time too, > though one would want allow_restart = 1 before doing such a thing. For ATA, it's currently being done inside libata proper (a bit ugly). It would be nice to have those implemented at sd layer but I wonder how useful it's going to be for actual SCSI devices. Do people actually suspend using SCSI? If it's useful at the SCSI layer, I can implement and test it with SATA devices here. Thanks. -- tejun - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
