Re: libata-tj and SMART

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Nicolas STRANSKY wrote:
Hi,

I've been using libata-tj for a couple of days and for now it's working
without problem, my SI-3112 is finally working :) Thanks !

How does it work w/o libata-tj?

I've noticed these errors while trying to issue some SMART commands to
the SATA drive :

May 16 00:28:33 aneto kernel: ata3: soft resetting port
May 16 00:28:33 aneto kernel: ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
May 16 00:28:33 aneto kernel: ata3.00: configured for UDMA/100
May 16 00:28:33 aneto kernel: ata3: EH complete
May 16 00:28:33 aneto kernel: ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x1 frozen
May 16 00:28:33 aneto kernel: ata3.00: tag 0 cmd 0xb0 Emask 0x2 stat 0x51 err 0x4 (HSM violation)
May 16 00:28:33 aneto kernel: ata3.00: failed to IDENTIFY (I/O error, err_mask=0x40)
May 16 00:28:33 aneto kernel: ata3.00: revalidation failed (errno=-5)
May 16 00:28:33 aneto kernel: ata3: failed to recover some devices, retrying in 5 secs
May 16 00:28:39 aneto kernel: ata3: soft resetting port
May 16 00:28:39 aneto kernel: ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
May 16 00:28:39 aneto kernel: ata3.00: configured for UDMA/100
May 16 00:28:39 aneto kernel: ata3: EH complete

Your drive/controller causes HSM violation probably while executing a SMART command (maybe during PIO-in during READ DATA?, maybe we need to dump feature, too). Can you try 'smartctl -d ata -a /dev/sdx' and report the result and how the kernel acts during that command?

Also, you've triggered a bug. It should try SRST after HSM violation not revalidation. I had that code. I must have dropped it somewhere. Thanks for finding the bug. :)

smartd then entered in a "D" state for some time.

smartd is probably waiting for libata EH.

Please feel free to ask for any relevant additional information...

Can you post full boot dmesg?

--
tejun
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