Re: [QUESTION] ATA: abnormal status 0x80 on port 0xCC07

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Hello,

Michal Piotrowski wrote:
[--snip--]
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index a388a8d..cf70702 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1037,7 +1037,7 @@ static unsigned int ata_id_xfermask(cons
                 * the PIO timing number for the maximum. Turn it into
                 * a mask.
                 */
-               u8 mode = id[ATA_ID_OLD_PIO_MODES] & 0xFF;
+               u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
                if (mode < 5)   /* Valid PIO range */
                        pio_mask = (2 << mode) - 1;
                else

All modern devices implement word53 and the above code probably never runs in your case.

There are 55 per cent chances that this is a hardware problem and
45 % that this is a software bug.

This seems more like a hardware problem to me.

  9 Power_On_Hours          0x0032   098   098   000    Old_age   Always       -       2207

Error 6 occurred at disk power-on lifetime: 2202 hours (91 days + 18 hours)
  When the command that caused the error occurred, the device was active or idle.

  After command completion occurred, registers were:
  ER ST SC SN CL CH DH
  -- -- -- -- -- -- --
  40 51 00 bc 0c 02 e0  Error: UNC at LBA = 0x00020cbc = 134332

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  c8 00 00 2f 0c 02 e0 00      00:01:07.193  READ DMA
  ec 03 46 00 00 00 a0 02      00:01:07.192  IDENTIFY DEVICE
  ef 03 46 00 00 00 a0 00      00:01:07.180  SET FEATURES [Set transfer mode]
  ec 00 00 bc 0c 02 a0 02      00:01:05.100  IDENTIFY DEVICE
  c8 00 00 2f 0c 02 e0 00      00:01:05.096  READ DMA

There have been a series of read errors on LBA 0x20cbc about five hours before the smart log was dumped. The error status as seen by the drive is uncorrectable media error at LBA 0x20cbc. The failing command is READ for LBA 0x20c2f, so the drive could read some sectors but not all of them. Maybe the command times out while the drive keeps retrying read.

Hmmm.. errors in smart log and dmesg don't have matching LBAs. So, it's possible that those failed read and the command timeouts are unrelated. Please keep watching and report. We need more info to determine what's going on.

--
tejun

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