I found a 2TB samsung drive that I have not use for some time so I thought I would had it to my array. I put it in and started preclear from command line using screen. while the preclear is working it has been going for 22 hours almost and has only done 7%.

 

I noticed it is running at around 2MB/s. I am sure last time I precleared a drive it was more like 40MB/s. I have run a smart report and it is attached.

 

what else can I test?

 

thanks in advance.

smart.txt

A syslog might be useful so we can see if any disk errors are being reported.  I think it is quite likely with that sort of speed, and the type of errors reported might help narrow down the cause.

syslog is now attached

syslog-1.zip

  1 Raw_Read_Error_Rate    0x002f  100  100  051    Pre-fail  Always      -      0 - NORMAL

  2 Throughput_Performance  0x0026  252  252  000    Old_age  Always      -      0 - NORMAL

  3 Spin_Up_Time            0x0023  067  065  025    Pre-fail  Always      -      10191 - NORMAL

  4 Start_Stop_Count        0x0032  097  097  000    Old_age  Always      -      3214 - NORMAL

  5 Reallocated_Sector_Ct  0x0033  252  252  010    Pre-fail  Always      -      0 - NORMAL (key attribute, >0 often bad)

  7 Seek_Error_Rate        0x002e  252  252  051    Old_age  Always      -      0 - NORMAL

  8 Seek_Time_Performance  0x0024  252  252  015    Old_age  Offline      -      0 - NORMAL

  9 Power_On_Hours          0x0032  100  100  000    Old_age  Always      -      756 - NORMAL

10 Spin_Retry_Count        0x0032  252  252  051    Old_age  Always      -      0 - NORMAL

11 Calibration_Retry_Count 0x0032  100  100  000    Old_age  Always      -      1 - UNUSUAL but ok I think

12 Power_Cycle_Count      0x0032  100  100  000    Old_age  Always      -      433 - NORMAL

181 Program_Fail_Cnt_Total  0x0022  100  100  000    Old_age  Always      -      3859042 - SCARY - but higher values seem common for this drive

191 G-Sense_Error_Rate      0x0022  100  100  000    Old_age  Always      -      9 - NOT SURE - has drive been dropped

192 Power-Off_Retract_Count 0x0022  252  252  000    Old_age  Always      -      0  - NORMAL

194 Temperature_Celsius    0x0002  057  052  000    Old_age  Always      -      43 (Min/Max 14/49) - ON THE WARM SIDE

195 Hardware_ECC_Recovered  0x003a  100  100  000    Old_age  Always      -      0 - NORMAL

196 Reallocated_Event_Count 0x0032  252  252  000    Old_age  Always      -      0 - NORMAL (key attribute, >0 often bad)

197 Current_Pending_Sector  0x0032  252  252  000    Old_age  Always      -      0 - NORMAL (key attribute, >0 often bad)

198 Offline_Uncorrectable  0x0030  252  252  000    Old_age  Offline      -      0 - NORMAL (key attribute, >0 often bad)

199 UDMA_CRC_Error_Count    0x0036  100  100  000    Old_age  Always      -      7 - SIGN OF CABLING ISSUE

200 Multi_Zone_Error_Rate  0x002a  100  100  000    Old_age  Always      -      998 - OFTEN SIGN OF DRIVE PROBLEM

223 Load_Retry_Count        0x0032  100  100  000    Old_age  Always      -      1 - UNUSUAL but ok I think

225 Load_Cycle_Count        0x0032  100  100  000    Old_age  Always      -      3286 - NORMAL

 

I'm most concerned with the values highlighted in Red. It does look like you have, or have had in the past, a cabling problem with the drive. Suggest reattaching or replacing the SATA cable and resecuring hte power.

thanks for the help, it was in an external drive case but that failed for some unknown reason. But the drive worked fine for 6 months afterwards once I removed it from the case. I can not remember it getting dropped but I do have young kids LOL.

 

So I should stop the pre-clear check the cables and try again?

Yes - that would be my suggestion. You are not going to add it to your array behaving like that. And if it speeds up it will finish hugely quicker than letting that continue.

 

I find it is best to change everything about the connection. Different power connector. Different port. Different cable. Different bay in drive cage (if using them). Anything in the connection chain you can change, change.

My issue is I run an hp micro server so I can not move the drives or change cables etc. I will have to do some reading about the micro servers to see what I can do. I have another 2tb drive which gets a random smart error about temp so I will give that a try and see if the preclude is any faster

I purchased two new 3tb drives and they precleared in under two days. Put the slow precleared disk in my pc and it came up with bad sectors and heaps of them!

I purchased two new 3tb drives and they precleared in under two days. Put the slow precleared disk in my pc and it came up with bad sectors and heaps of them!

What did the SMART report say at that time?  Did it show any indication of potential problems?