Re: Need help understanding SATA error message.

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Mark Lord wrote:
Tomas Lund wrote:
Hello,

I have a SuperMicro X7SBi with ICH9R SATA running 64bit linux 2.6.24.4. I have 4 1TB disks connected to the motherboard, and one of the disks is logging an error message. Everything is brand new, and hooked up just a few weeks ago.
..
ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
ata2.00: irq_stat 0x40000001
ata2.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0
         res 51/04:00:0a:24:f9/00:00:00:00:00/a9 Emask 0x1 (device error)
ata2.00: status: { DRDY ERR }
ata2.00: error: { ABRT }
..
  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  ea 00 00 00 00 00 00 08      03:56:15.157  FLUSH CACHE EXIT
  61 08 00 3f 59 70 74 08      03:56:15.157  [RESERVED FOR SERIAL ATA]
  ea 00 00 00 00 00 00 08      03:56:15.157  FLUSH CACHE EXIT
  ea 00 00 00 00 00 00 08      03:56:00.377  FLUSH CACHE EXIT
  61 08 00 3f 59 70 74 08      03:56:00.377  [RESERVED FOR SERIAL ATA]
..

The SMART log shows that 0xea was a "FLUSH CACHE EXT" (not "EXIT", duh..)
command, which is what libata issues when it wants to ensure that all
cached data has been written to the drive.

This particular drive is reporting that it doesn't understand the command.
..

Duh..  actually, we were just discussing this very error in another thread.
The drive is really telling us that it hit an unrecoverable WRITE error
at sector 0a:24:f9 on the drive.  Bad sector.

There are patches queued up for 2.6.26 to automatically resume the cache
flush after the failed sector, but you'll still lose data at that sector.

Time for a low-level reformat, if the manufacturer has a utility for that.
Otherwise, RMA it.

Cheers
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