Scharbag
Guru
- Joined
- Feb 1, 2012
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smartctl -a /dev/da20 smartctl 6.5 2016-05-07 r4318 [FreeBSD 10.3-STABLE amd64] (local build) Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Model Family: Crucial/Micron RealSSD C300/M500 Device Model: Crucial_CT480M500SSD1 Serial Number: 14331D8B1F36 LU WWN Device Id: 5 00a075 10c2b1f36 Firmware Version: MU05 User Capacity: 480,103,981,056 bytes [480 GB] Sector Sizes: 512 bytes logical, 4096 bytes physical Rotation Rate: Solid State Device Form Factor: 2.5 inches Device is: In smartctl database [for details use: -P show] ATA Version is: ACS-2, ATA8-ACS T13/1699-D revision 6 SATA Version is: SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s) Local Time is: Sun Jan 15 12:52:01 2017 CST 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: (0x80) Offline data collection activity was never started. Auto Offline Data Collection: Enabled. Self-test execution status: ( 0) The previous self-test routine completed without error or no self-test has ever been run. Total time to complete Offline data collection: ( 2235) seconds. Offline data collection capabilities: (0x7b) SMART execute Offline immediate. Auto Offline data collection on/off support. Suspend Offline collection upon new command. Offline surface scan supported. Self-test supported. Conveyance Self-test supported. Selective Self-test supported. SMART capabilities: (0x0003) Saves SMART data before entering power-saving mode. Supports SMART auto save timer. Error logging capability: (0x01) Error logging supported. General Purpose Logging supported. Short self-test routine recommended polling time: ( 2) minutes. Extended self-test routine recommended polling time: ( 37) minutes. Conveyance self-test routine recommended polling time: ( 3) minutes. SCT capabilities: (0x0035) SCT Status supported. SCT Feature Control supported. SCT Data Table supported. SMART Attributes Data Structure revision number: 16 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x002f 100 100 000 Pre-fail Always - 0 5 Reallocated_Sector_Ct 0x0033 100 100 000 Pre-fail Always - 0 9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 17848 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 36 171 Program_Fail_Count 0x0032 100 100 000 Old_age Always - 0 172 Erase_Fail_Count 0x0032 100 100 000 Old_age Always - 0 173 Wear_Leveling_Count 0x0032 096 096 000 Old_age Always - 134 174 Unexpect_Power_Loss_Ct 0x0032 100 100 000 Old_age Always - 21 180 Unused_Rsvd_Blk_Cnt_Tot 0x0033 000 000 000 Pre-fail Always - 8219 183 SATA_Iface_Downshift 0x0032 100 100 000 Old_age Always - 0 184 End-to-End_Error 0x0032 100 100 000 Old_age Always - 0 187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0 194 Temperature_Celsius 0x0022 071 056 000 Old_age Always - 29 (Min/Max 0/44) 196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 100 100 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0030 100 100 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0032 100 100 000 Old_age Always - 0 202 Percent_Lifetime_Used 0x0031 096 096 000 Pre-fail Offline - 4 206 Write_Error_Rate 0x000e 100 100 000 Old_age Always - 0 210 Success_RAIN_Recov_Cnt 0x0032 100 100 000 Old_age Always - 0 246 Total_Host_Sector_Write 0x0032 100 100 --- Old_age Always - 51911182937 247 Host_Program_Page_Count 0x0032 100 100 --- Old_age Always - 1654105725 248 Bckgnd_Program_Page_Cnt 0x0032 100 100 --- Old_age Always - 2649136468 SMART Error Log Version: 1 No Errors Logged SMART Self-test log structure revision number 1 Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error # 1 Short offline Completed without error 00% 17848 - # 2 Short offline Completed without error 00% 17842 - # 3 Short offline Completed without error 00% 17836 - # 4 Short offline Completed without error 00% 17830 - # 5 Short offline Completed without error 00% 17824 - # 6 Short offline Completed without error 00% 17818 - # 7 Short offline Completed without error 00% 17812 - # 8 Short offline Completed without error 00% 17806 - # 9 Short offline Completed without error 00% 17800 - #10 Short offline Completed without error 00% 17794 - #11 Short offline Completed without error 00% 17788 - #12 Short offline Completed without error 00% 17782 - #13 Short offline Completed without error 00% 17776 - #14 Short offline Completed without error 00% 17770 - #15 Short offline Completed without error 00% 17764 - #16 Short offline Completed without error 00% 17758 - #17 Short offline Completed without error 00% 17752 - #18 Short offline Completed without error 00% 17746 - #19 Short offline Completed without error 00% 17740 - #20 Short offline Completed without error 00% 17734 - #21 Short offline Completed without error 00% 17728 - SMART Selective self-test log data structure revision number 1 SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS 1 0 0 Not_testing 2 0 0 Not_testing 3 0 0 Not_testing 4 0 0 Not_testing 5 0 0 Not_testing Selective self-test flags (0x0): After scanning selected spans, do NOT read-scan remainder of disk. If Selective self-test is pending on power-up, resume after 0 minute delay.
Unless you purposely truncated most of the useful data from your SMART results, you smartctl -a should return all of the above information if it has true physical access to your hard drives.
Using an eSATA enclosures may place another piece of hardware in between ZFS and your drives, effectively nullifying the benefit of ZFS. To properly house your drives in an external enclosure, you need to use an exclosure with a proper SATA/SAS expander.
There is a really nice section in the hardware guide that discusses eSATA and SATA port multipliers:
SATA Port Multipliers
These really deserve a category of their own. They’re universally crap. Beyond that, there are a few additional reasons why they would never be a good choice:
- Intel SATA, which is the only 100% reliable SATA solution out there, explicitly does not support port multipliers.
o Even WD knows this. When they released a hybrid 120GB SSD/1TB HDD, they could not use a port multiplier to connect them both to a single SATA port. They were forced to use a custom controller that handled both spinning rust and NAND flash and mapped the first LBAs onto flash and the rest onto disk.
- The most common application for SATA port multipliers are eSATA chassis. Those are also universally crap in their own right, with issues from bad cooling to dodgy PSUs.
- They’re cheap alternatives to SAS expanders. They’re just a cash grab.
- Many also do even more horrible stuff, like hardware RAID for the enclosures mentioned
above – yes, on tiny chips with essentially no resources. Yes, they’re a disaster.
While FreeNAS is, well, free, their are certain hardware considerations that should be followed. If you choose not to follow clearly communicated requirements, then the risk is 100% yours.
Cheers,