Marc MERLIN wrote:
> It took many days of moving things around and trying, and I think I finally
> got to something that works.

Great.

>> PM: Adding info for No Bus:usbdev2.1
>> ata3: SATA link down (SStatus 0 SControl 0)
>> ata4: SATA link up 3.0 Gbps (SStatus 123 SControl 0)
>> ata4.15: Port Multiplier 1.1, 0x1095:0x3726 r23, 6 ports, feat 0x1/0x9
>> ata4.00: hard resetting link
>> ata4.00: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
>> ata4.01: hard resetting link
>> ata4.01: softreset failed (timeout)
>> ata4.01: hard resetting link
>> ata4.01: COMRESET failed (errno=-5)
>> ata4.01: reset failed, giving up
>> ata4.15: hard resetting link
>> ata4.15: softreset failed (timeout)
>> ata4.15: hard resetting link
>> ata4.15: SATA link up 3.0 Gbps (SStatus 123 SControl 0)
>> ata4.00: hard resetting link
>> ata4.00: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
>> ata4.01: hard resetting link
>> ata4.01: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
>> ata4.02: hard resetting link
>> ata4.02: softreset failed (timeout)
>> ata4.02: hard resetting link
>> ata4.02: COMRESET failed (errno=-5)
>> ata4.02: reset failed, giving up
>> ata4.15: hard resetting link
>> ata4.15: softreset failed (timeout)
>> ata4.15: hard resetting link
>> ata4.15: SATA link up 3.0 Gbps (SStatus 123 SControl 0)
>> ata4.00: hard resetting link
>> ata4.00: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
>> ata4.01: hard resetting link
>> ata4.01: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
>> ata4.02: hard resetting link
>> ata4.02: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
>> ata4.03: hard resetting link
>> ata4.03: softreset failed (timeout)
>> ata4.03: hard resetting link
>> ata4.03: COMRESET failed (errno=-5)
>> ata4.03: reset failed, giving up

This is a known problem.  While spinning each drive up, reset fails and
unsure of controller state, libata resets whole controller each time.  I
missed it because my array is usually up all the time.  I'll look into it.

Thanks.

-- 
tejun
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