Andrew Henry wrote: > Any news with this? I start to understand that this really is a missing > function in the sata_sil driver: driver does not work well with power > saving modes/standby on eSATA drives. > > I have created a cron script to 'ping' the drives usng sdparm -C start > /dev/sdX every 3 minutes and the drives have been operating with RAID1 > and dmcrypt for 4 days non-stop without error. > > It does seem that this fault I am experiencing is only caused by > incomplete driver. Can someone please acknowledge this? It looks like bad interaction with link power saving to me. libata currently inhibits all link power saving and doesn't configure device side power saving either, so the link should never enter powersaving mode but some "green" drives are known to take extreme measures to cut down on power. At any rate, the drive and link should wake up when the controller strobes the link w/ PHY reset no matter in which PS mode it's in. I can't think of any good solution at the moment. Can you please post the outputs of dmesg after the wake up failure (fdisk -l) and "hdparm --Istdout /dev/sdX"? -- 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
