On Thu, Nov 01, 2012 at 11:56:18AM +0100, Sander wrote: > > For now, I'll stick with 3.5.3 for a while to make sure my drive is actually > > ok (it seems to be afterall), and once I'm happy that it's the case, I'll go > > back to 3.6.3 with serial console remote logging and try to capture the full > > sata failure I got with 3.6.3. > > Thanks for the info. You could put some load on the ssd to see if you > can trigger an issue under 3.6.3(+) with btrfs filesystem scrub or > badblocks (in the default non-destructive mode). I'll try this in a few days when I've first comfirmed that my SSD is still 100% stable under 3.5.3 (so far it is). After that, I'll go back to 3.6.3 and see what it takes to crash it. But as per my original report and http://marc.merlins.org/tmp/crash.jpg this does look like a sata layer problem, which btrfs isn't responsible for. Also there is still that unaddressed bug that when it does happen, btrfs then can end up in a state where the filesystem is unmountable without manually fixing it. > Can you collect SMART data (with smartctl) from the ssd? I did actually have a look, but to be honest, SSDs have pretty useless smart data overall. Mine's likely a bit worse than the average even. gandalfthegreat:~# smartctl -a /dev/sda smartctl 5.41 2011-06-09 r3365 [x86_64-linux-3.5.3-amd64-preempt-noide-20120903] (local build) Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net === START OF INFORMATION SECTION === Device Model: OCZ-VERTEX4 Serial Number: OCZ-26W4VJ3SP32E1WC2 LU WWN Device Id: 5 e83a97 59be3b57e Firmware Version: 1.5 User Capacity: 512,110,190,592 bytes [512 GB] Sector Size: 512 bytes logical/physical Device is: Not in smartctl database [for details use: -P showall] ATA Version is: 9 ATA Standard is: Exact ATA specification draft version not indicated Local Time is: Thu Nov 1 09:14:43 2012 PDT SMART support is: Available - device has SMART capability. SMART support is: Enabled === START OF READ SMART DATA SECTION === SMART overall-health self-assessment test result: PASSED General SMART Values: Offline data collection status: (0x00) Offline data collection activity was never started. Auto Offline Data Collection: Disabled. Self-test execution status: ( 249) Self-test routine in progress... 90% of test remaining. Total time to complete Offline data collection: ( 0) seconds. Offline data collection capabilities: (0x1d) SMART execute Offline immediate. No Auto Offline data collection support. Abort Offline collection upon new command. Offline surface scan supported. Self-test supported. No Conveyance Self-test supported. No Selective Self-test supported. SMART capabilities: (0x0003) Saves SMART data before entering power-saving mode. Supports SMART auto save timer. Error logging capability: (0x00) Error logging NOT supported. General Purpose Logging supported. Short self-test routine recommended polling time: ( 0) minutes. Extended self-test routine recommended polling time: ( 0) minutes. SMART Attributes Data Structure revision number: 18 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x0000 006 000 000 Old_age Offline - 6 3 Spin_Up_Time 0x0000 100 100 000 Old_age Offline - 0 4 Start_Stop_Count 0x0000 100 100 000 Old_age Offline - 0 5 Reallocated_Sector_Ct 0x0000 100 100 000 Old_age Offline - 8 9 Power_On_Hours 0x0000 100 100 000 Old_age Offline - 1210 12 Power_Cycle_Count 0x0000 100 100 000 Old_age Offline - 240 232 Available_Reservd_Space 0x0000 100 100 000 Old_age Offline - 8019542246 233 Media_Wearout_Indicator 0x0000 099 000 000 Old_age Offline - 99 SMART Error Log not supported Warning! SMART Self-Test Log Structure error: invalid SMART checksum. SMART Self-test log structure revision number 1 No self-tests have been logged. [To run self-tests, use: smartctl -t] Device does not support Selective Self Tests/Logging Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/ -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
