FreeNAS RAM and Pool Size

[tio]

Hi

I know this has been done to death but my head hurts and I'm not sure whether or not I'm missing something here

I want to upgrade the disks in my N54L to 3TB. The total storage will be 18TB (unformatted), i have the maximum ram of 16GB ECC.

Do i need more to guarantee the pools health, or is this ok?

At the moment I'm getting random drive errors so I'm going to RMA them all and make a bigger pool in the meantime. All input appreciated as always

 

[warri]

The guideline is 1 GB of RAM per TB of storage, but I think the general consent is that you are pretty safe with 8 GB and any extra just helps performance-wise. In other words: You will be totally fine.

 

[HoneyBadger]

I'd be more concerned about "random drive errors" impacting your pool's health ... but 16GB ECC should be fine. You might not get as much performance, because you're trying to cache more pool in the same space, but it should be fine.

 

[tio]

I'd be more concerned about "random drive errors" impacting your pool's health ... but 16GB ECC should be fine. You might not get as much performance, because you're trying to cache more pool in the same space, but it should be fine.

Its one of my 1.5TB drives has 3 multi zone errors. I have backup and the pool is 6TB and 2TB full so I'm not overly concerned at the moment.

The main issue is one of the drives appears to be have issues reading and or writing forcing the led to be constantly on and stopping the entire pool from responding until it decides to wake it lazy ass up out of its epileptic fit. The issue is, I've run SMART tests and nothing is mechanically wrong according to the readout with the one that has the issue which is frustrating beyond belief.

 

[jgreco]

The amount of RAM is totally peachy for average use.

 

[cyberjock]

The main issue is one of the drives appears to be have issues reading and or writing forcing the led to be constantly on and stopping the entire pool from responding until it decides to wake it lazy ass up out of its epileptic fit. The issue is, I've run SMART tests and nothing is mechanically wrong according to the readout with the one that has the issue which is frustrating beyond belief.

So you can run a long test and it'll pass? Can you post the smartctl -a -q noserial /dev/XXX for your device?

 

[tio]

Hi CJ

Im assuming the command should be

smartctl -a -q noserial /dev/ada0

If so i can get on that later on today and post the readout

 

[cyberjock]

If ada0 is the problem disk, then yes.

 

[tio]

Code:

=== START OF INFORMATION SECTION ===
Model Family:    SAMSUNG SpinPoint F2 EG
Device Model:    SAMSUNG HD154UI
Firmware Version: 1AG01118
User Capacity:    1,500,301,910,016 bytes [1.50 TB]
Sector Size:      512 bytes logical/physical
Device is:        In smartctl database [for details use: -P show]
ATA Version is:  ATA/ATAPI-7, ATA8-ACS T13/1699-D revision 3b
Local Time is:    Fri Apr 25 09:16:27 2014 BST
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:      (  0)    The previous self-test routine completed
                    without error or no self-test has ever
                    been run.
Total time to complete Offline
data collection:        (18990) 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:      ( 317) minutes.
Conveyance self-test routine
recommended polling time:      (  33) minutes.
SCT capabilities:            (0x003f)    SCT Status supported.
                    SCT Error Recovery Control 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    0x000f  100  100  051    Pre-fail  Always      -      0
  3 Spin_Up_Time            0x0007  071  071  011    Pre-fail  Always      -      9510
  4 Start_Stop_Count        0x0032  099  099  000    Old_age  Always      -      789
  5 Reallocated_Sector_Ct  0x0033  100  100  010    Pre-fail  Always      -      0
  7 Seek_Error_Rate        0x000f  100  100  051    Pre-fail  Always      -      0
  8 Seek_Time_Performance  0x0025  100  100  015    Pre-fail  Offline      -      11907
  9 Power_On_Hours          0x0032  098  098  000    Old_age  Always      -      10078
10 Spin_Retry_Count        0x0033  100  100  051    Pre-fail  Always      -      0
11 Calibration_Retry_Count 0x0012  100  100  000    Old_age  Always      -      0
12 Power_Cycle_Count      0x0032  100  100  000    Old_age  Always      -      287
13 Read_Soft_Error_Rate    0x000e  100  100  000    Old_age  Always      -      0
183 Runtime_Bad_Block      0x0032  100  100  000    Old_age  Always      -      0
184 End-to-End_Error        0x0033  100  100  000    Pre-fail  Always      -      0
187 Reported_Uncorrect      0x0032  100  100  000    Old_age  Always      -      0
188 Command_Timeout        0x0032  100  100  000    Old_age  Always      -      0
190 Airflow_Temperature_Cel 0x0022  070  065  000    Old_age  Always      -      30 (Min/Max 14/34)
194 Temperature_Celsius    0x0022  069  064  000    Old_age  Always      -      31 (4 114 36 14 0)
195 Hardware_ECC_Recovered  0x001a  100  100  000    Old_age  Always      -      302567353
196 Reallocated_Event_Count 0x0032  100  100  000    Old_age  Always      -      0
197 Current_Pending_Sector  0x0012  100  100  000    Old_age  Always      -      0
198 Offline_Uncorrectable  0x0030  100  100  000    Old_age  Offline      -      0
199 UDMA_CRC_Error_Count    0x003e  100  100  000    Old_age  Always      -      0
200 Multi_Zone_Error_Rate  0x000a  100  100  000    Old_age  Always      -      3
201 Soft_Read_Error_Rate    0x000a  100  100  000    Old_age  Always      -      0
 
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  Extended offline    Completed without error      00%    10009        -
# 2  Extended offline    Completed without error      00%      9841        -
# 3  Extended offline    Completed without error      00%      9673        -
# 4  Extended offline    Completed without error      00%      9504        -
# 5  Extended offline    Completed without error      00%      9433        -
# 6  Extended offline    Completed without error      00%      9269        -
# 7  Extended offline    Completed without error      00%      9101        -
# 8  Extended offline    Completed without error      00%      8933        -
# 9  Extended offline    Completed without error      00%      8768        -
#10  Extended offline    Completed without error      00%      8600        -
#11  Extended offline    Completed without error      00%      8432        -
#12  Extended offline    Completed without error      00%      8258        -
#13  Extended offline    Completed without error      00%      8091        -
#14  Extended offline    Completed without error      00%      8045        -
#15  Extended offline    Completed without error      00%      7850        -
#16  Extended offline    Completed without error      00%      7685        -
#17  Extended offline    Completed without error      00%      7515        -
#18  Extended offline    Completed without error      00%      7347        -
#19  Extended offline    Completed without error      00%      7304        -
#20  Extended offline    Completed without error      00%      7106        -
#21  Extended offline    Completed without error      00%      6939        -
 
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.

 

[cyberjock]

Geez. That kind of sucks. The drive looks both healthy and not healthy. A Multi_Zone_Error_Rate of 3 is bad, but not "ZOMG my data is going to go away" bad. Unfortunately not many people use Samsung drives in this neighborhood. The simplest/cheapest advice would be to simply replace the drive. RMA isn't possible since it's passing diagnostics(at least not by WD/Seagate standards) so you might have to just write the drive off as a total loss. Of course, it may be a total loss anyway because the drive may be out of warranty.

 

[tio]

Hi

Ive found the culprit!

This blasted WD Green EADS I've got in the NAS

Code:

Model Family:    Western Digital Caviar Green
Device Model:    WDC WD15EADS-00P8B0
Serial Number:    WD-WMAVU0055200
LU WWN Device Id: 5 0014ee 0ac256882
Firmware Version: 01.00A01
User Capacity:    1,500,301,910,016 bytes [1.50 TB]
Sector Size:      512 bytes logical/physical
Device is:        In smartctl database [for details use: -P show]
ATA Version is:  ATA8-ACS (minor revision not indicated)
SATA Version is:  SATA 2.6, 3.0 Gb/s
Local Time is:    Sun May  4 12:01:32 2014 BST
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:  (0x84)    Offline data collection activity
                    was suspended by an interrupting command from host.
                    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:        (31800) 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:      ( 363) minutes.
Conveyance self-test routine
recommended polling time:      (  5) minutes.
SCT capabilities:            (0x303f)    SCT Status supported.
                    SCT Error Recovery Control 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  200  200  051    Pre-fail  Always      -      0
  3 Spin_Up_Time            0x0027  179  177  021    Pre-fail  Always      -      6016
  4 Start_Stop_Count        0x0032  100  100  000    Old_age  Always      -      438
  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  094  094  000    Old_age  Always      -      4986
10 Spin_Retry_Count        0x0032  100  100  000    Old_age  Always      -      0
11 Calibration_Retry_Count 0x0032  100  100  000    Old_age  Always      -      0
12 Power_Cycle_Count      0x0032  100  100  000    Old_age  Always      -      182
192 Power-Off_Retract_Count 0x0032  200  200  000    Old_age  Always      -      35
193 Load_Cycle_Count        0x0032  117  117  000    Old_age  Always      -      251752
194 Temperature_Celsius    0x0022  114  107  000    Old_age  Always      -      36
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  200  200  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
 
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  Extended offline    Completed without error      00%      2031        -
# 2  Extended offline    Completed without error      00%      1840        -
# 3  Extended offline    Completed without error      00%      1674        -
# 4  Extended offline    Completed without error      00%      1508        -
# 5  Extended offline    Completed without error      00%      1344        -
# 6  Short offline      Completed without error      00%      1061        -
# 7  Short offline      Completed without error      00%      1060        -
# 8  Short offline      Completed without error      00%      1059        -
# 9  Short offline      Completed without error      00%      1058        -
#10  Short offline      Completed without error      00%      1057        -
#11  Short offline      Completed without error      00%      1056        -
#12  Short offline      Completed without error      00%      1055        -
#13  Short offline      Completed without error      00%      1054        -
#14  Short offline      Completed without error      00%      1053        -
#15  Short offline      Completed without error      00%      1052        -
#16  Short offline      Completed without error      00%      1051        -
#17  Short offline      Completed without error      00%      1050        -
#18  Short offline      Completed without error      00%      1049        -
#19  Short offline      Completed without error      00%      1048        -
#20  Short offline      Completed without error      00%      1047        -
#21  Short offline      Completed without error      00%      1046        -
 
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.

LCC is way up there and i believe the start stop count is also to high as well. This i think is what is causing my whole Pool to lock up for a standard 10 minute interval.

I would really appreciate any and all info anyone could spare on this as to whether i have to replace two drives, or 1. Incidentally the other Samsung now has a 1 Multi Zone Error rate down from 3

 

[cyberjock]

There are no errors on that drive, at all. The Start_Stop_Count is 438, which isn't exactly 'high'. Plenty of people are well over 2000 and even 5000 depending on your server use. Even if your disk is stopping and starting, the first time it goes offline it'll be dropped from the pool. So you'd have plenty of fingers pointing straight at that drive. Just look at your Samsung, it's got about twice the poweron hours and about 50% more start/stop cycles.

Yes, your LCC is high, but that's because you put a Green in the server without setting wdidle. See my guide in the "How-To" section of the forum for instructions on preventing that number from going even higher.

But, I'd call the WD drive fine by all standards(with the exception of the lack of setting wdidle).

There's *far* more evidence that the Samsung is bad than the WD Green. There's literally no evidence whatsoever that the Green has any problems.

 

[tio]

Hi CJ

When the server was in one of its fits, the SMART test on the Green was literally taking 1 minute, the others were straight away giving me outputs.

Do you have any recommendations on some decent drives to replace it with that aren't plastered with RED or some other label to give an artificially high price? Seems harder and hard to get 5900rpm and lower drives.

 

[cyberjock]

That 1 minute wait could be the result of anything. Even SATA controller failure on your motherboard. So I don't consider that fact to be too useful for identifying a bad *disk*. Something else is wrong and that may be a clue. But I don't think that's enough to say the disk is failing. Especially considering that the disk's own internal diagnostics are fine.

Greens work just fine as long as you use the wdidle tool. I've got 24 of them and they have been amazing for me.