ata3.15: exception Emask 0x10 SAct 0x0 SErr 0x280100 action 0x6

This message shows up when the OS starts.

How can I find out what ata4 means? Which hard drive does it refer to?

thanks

1 Answer

There are several ways to do this. One easy way is to check the boot messages:

dmesg | grep ata4

One of the output lines should list the name of the device. In my case,

$ dmesg | grep ata1
[ 0.661885] ata1: SATA max UDMA/133 abar m131072@0xfcc80000 port 0xfcc80100 irq 39
[ 1.136128] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 1.137690] ata1.00: supports DRM functions and may not be fully accessible
[ 1.138275] ata1.00: disabling queued TRIM support
[ 1.138277] ata1.00: ATA-9: Samsung SSD 850 EVO 250GB, EMT02B6Q, max UDMA/133
[ 1.138279] ata1.00: 488397168 sectors, multi 1: LBA48 NCQ (depth 32), AA
[ 1.139271] ata1.00: supports DRM functions and may not be fully accessible
[ 1.139809] ata1.00: disabling queued TRIM support
[ 1.140580] ata1.00: configured for UDMA/133

This tells me it's a Samsung 850 EVO 250GB.

ata4 corresponds to /dev/sdd -- the d being the 4th Sata Disk.

It should also correspond to SATA connector 4 on your motherboard.

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