Re: [2.6.21.1] SATA freeze

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Fred Moyer wrote:
This appears to be a different problem. Something is issuing SMART-related commands (smartd or smartctl perhaps) which the drive seems to be reacting strangely to. It apparently completed the command but never raised DRQ to request any data being transferred even though we expected it to. Maybe SMART is disabled on the drive and that's causing it to just toss these commands? CCing linux-ide in case anyone knows what would cause this.

Here's smartctl -a for this drive - same output for both sda and sdb. Smartd is currently running. Any advice appreciated.

Previously on 2.6.15 I was seeing sdb remount as readonly under heavy i/o. I have not seen that issue yet with 2.6.21 (with Robert's patch from May 5th for sata_nv), but that occurrence of remounts read-only was infrequently, so that issue may be solved.

app2 ~ # smartctl -a /dev/sda
smartctl version 5.36 [x86_64-pc-linux-gnu] Copyright (C) 2002-6 Bruce Allen
Home page is http://smartmontools.sourceforge.net/

Device: ATA      ST3808110AS      Version: n/a
Serial number:             5LR8895K
Device type: disk
Local Time is: Sat May 12 12:05:58 2007 PDT
Device does not support SMART

Error Counter logging not supported

[GLTSD (Global Logging Target Save Disable) set. Enable Save with '-S on']
Device does not support Self Test logging


Sounds like SMART is likely disabled on that drive. You can try doing "smartctl -s on /dev/sda" and see if that will turn it on.

--
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@xxxxxxxxxxxxx
Home Page: http://www.roberthancock.com/

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