-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 I found the culprit. It seems that ata_port_reset identifies the device, and if it has power up in standby enabled, and requires the SET FEATURES command to spin up, issues the command right away. I wonder: 1) If the spinup command can't be delayed until the disk is actually accessed and/or 2) If the disk is in runtime suspend when the system is suspended, why doesn't it remain suspended when the system is resumed, thus delaying the port reset until the runtime suspend is lifted ( when the disk is accessed ). -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBCgAGBQJSeYhMAAoJEJrBOlT6nu75jUgH/A64U4GQZxzLdkM6/ewpSK31 C+UZ+PAy3l0jUdCtYwDCca7k7bC94Jh5vrOi2WlglmRIVnRl1PzcMfOFalm0Ca2m uibKvA3LSLsE/ICB+gl0329au5GADO/hLcuLb8v0U7ZgTPwSwdrqFM5ApUatPFf5 RBVZbwMojl7aXSRkmHS1L48BIRc9X4G2wLB4qgE+tJFP8s04l1cC7fWSf5e7vUNw 4scSPzahgGAOrsy7tQQgc2vP7uM/m0LRFN4Gs6gC9axFfCTQ5oYA/0TiOVpeRDYh PfPfp0InoNiOuq1QPW+T9TbuAsHp7GxxoAl6ljqOUAZ3sWisEV56lYYsNjwCEs0= =wQsh -----END PGP SIGNATURE----- -- 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