Elias Oltmanns wrote: > apparently, we have the first case of a quirky implementation of > idleimmediate with unload feature in a device, or I'm barking up the > wrong tree, of course. Evgeni Golov has reported the following on > hdaps-devel: Aieeeee... > Evgeni Golov <sargentd@xxxxxxxxxxxx> wrote: >> Hi, >> >> I have a ThinkPad Z61m with a 100GB S-ATA TOSHIBA MK1032GSX. > [...] >> Now I thought I should try the new interface and compiled 2.6.28-rc2, > [...] >> After that I could park the heads and got the following in dmesg: >> >> ata1: exception Emask 0x10 SAct 0x0 SErr 0x50000 action 0xf >> ata1: SError: { PHYRdyChg CommWake } >> ata1: hard resetting link >> ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) >> ata1.00: ACPI cmd ef/02:00:00:00:00:a0 succeeded >> ata1.00: ACPI cmd f5/00:00:00:00:00:a0 filtered out >> ata1.00: ACPI cmd ef/10:03:00:00:00:a0 filtered out >> ata1.00: ACPI cmd ef/02:00:00:00:00:a0 succeeded >> ata1.00: ACPI cmd f5/00:00:00:00:00:a0 filtered out >> ata1.00: ACPI cmd ef/10:03:00:00:00:a0 filtered out >> ata1.00: configured for UDMA/100 >> ata1.00: configured for UDMA/100 >> ata1: EH complete >> sd 0:0:0:0: [sda] 195371568 512-byte hardware sectors: (100 GB/93.1 GiB) >> sd 0:0:0:0: [sda] Write Protect is off >> sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 >> sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't >> support DPO or FUA >> sd 0:0:0:0: [sda] 195371568 512-byte hardware sectors: (100 GB/93.1 GiB) >> sd 0:0:0:0: [sda] Write Protect is off >> sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 >> sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't >> support DPO or FUA > > The only explanation I could come up with so far is that the head park > command, for some reason or other, causes the device to set > SERR_PHYRDY_CHG and SERR_COMM_WAKE in serror, thus triggering the > handling of hotplug events. Do you have any idea what's really going on > here and what can / should be done about it? Is it a laptop? Does 'hdparm -y' cause the same thing? Can you post "hdparm -I"? 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