Considering ZFS But Have Some Questions

[Rilo Ravestein]

There are several threads in this forum mentioning the USB3 'issue'. You shouldn't care less about it, since the only time you could notice a speed difference (if you would notice at all) is at boot time and when upgrading FreeNAS.

 

[Toadlips]

OK, guys. Thanks for your help! Things are getting interesting now...I've been running the badblocks test via tmux for the last 55 hours. Unfortunately, I can only see 5 panes (out of the 6 I think I should have), and, looking at the Disk Activity report, my fears have been confirmed -- my 6th drive has not been bad blocking. However, more concerning than that is the display from badblock. EACH of the drives that is being tested shows a display very close to the following:

90.66% done, 55:53:30 elapsed. (0/0/654598 errors)

I didn't think much of the last number because all of the drives were similar, with numbers ranging from 596095 to 661385.

Running smartctl -A /dev/adaX gives me a clean bill of health (I think). Here's a sample:

Code:

=== START OF READ SMART DATA SECTION ===
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   200   200   051    Pre-fail  Always       -       0
  3 Spin_Up_Time            0x0027   100   253   021    Pre-fail  Always       -       0
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       5
  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0
  9 Power_On_Hours          0x0032   100   100   000    Old_age   Always       -       111
10 Spin_Retry_Count        0x0032   100   253   000    Old_age   Always       -       0
11 Calibration_Retry_Count 0x0032   100   253   000    Old_age   Always       -       0
12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       5
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       1
193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       21
194 Temperature_Celsius     0x0022   125   122   000    Old_age   Always       -       25
196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0030   100   253   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age   Offline      -       0

So, my thought is that the drives are not "really" bad, but am I misinterpreting the readout, or do those error counts through badblocks actually mean something? I have the SuperMicro X10SLL-F motherboard. I may need to look at the hard drive controller settings in the BIOS, I'd imagine? Any other ideas?

Thanks!!

 

[Toadlips]

Please disregard my previous post. As some kind souls in the IRC chatroom pointed out, I had mounted the drives in a pool. I had mistakenly assumed that nothing was being written to the drives since I hadn't actually added any data to the volumes. Call it a rookie mistake! For the sake of posterity, let my buffoonery be proudly displayed to prevent others from making similar mistakes!