Anyone with experience with WD 8TB WD80EMZZ drives?

[silversword]

I was trying to shuck some WD Red's out of the EasyStore 8TB Externals, ended up getting a white labeled drive
Model: WD80EMZZ-00TBGA0
128MB Cache
PN: 2W10101
RM: US7SAJ800

Are these the OEM WD Red's, or another variant? Anyone with any experience with them?

Thx!

 

[rvassar]

It likely doesn't have the NAS "Red" firmware, and may cause you a few timeouts... But the white label is intriguing. That might be off the HGST line. If it's missing the "do not cover" vent holes, you've got a real treat.

 

[silversword]

If it's missing the "do not cover" vent holes, you've got a real treat.

I was thinking with a Z2 array, a single drive with retries won't bog the entire volume down will it?

 

[rvassar]

Check and see if it reports SMART attribute ID #22. Should have a value up near 100. If it does, you most likely have a white label HGST He8. :)

 

[Johnnie Black]

There are no vent holes on Helium disks, and AFAIK all 8TB WDs use Helium.

 

[Ericloewe]

The flat top is characteristic of the Helium disks.

 

[rvassar]

The flat top is characteristic of the Helium disks.

I'm not sure that's universally true, I've certainly owned drives in the past that were flat topped, but far too long ago to be He. But currently, all the He drives are flat-topped. The SMART #22 attribute is telltale, according to the crew over at Backblaze.

The real question is what firmware does it have? What features does it support? Does it have firmware that supports use in multi-disk chassis w/vibrations, advanced NCQ / cache management, what are the TLER/CCTL parameters, etc... Some of this is often of more interest to people using hardware RAID controllers, as a long non-TLER glitch may cause the drive to drop out of the array. With ZFS, I seem to remember it actively tries to write to sectors that trip TLER, so that it can force them to be remapped, but it's been a few years...

 

[Ericloewe]

I'm not sure that's universally true

I'm pretty sure it is for current models. Of course, don't trust me blindly.

 

[silversword]

The SMART #22 attribute is telltale, according to the crew over at Backblaze.

The real question is what firmware does it have? What features does it support? Does it have firmware that supports use in multi-disk chassis w/vibrations, advanced NCQ / cache management, what are the TLER/CCTL parameters, etc... Some of this is often of more interest to people using hardware RAID controllers, as a long non-TLER glitch may cause the drive to drop out of the array. With ZFS, I seem to remember it actively tries to write to sectors that trip TLER, so that it can force them to be remapped, but it's been a few years...

So that's what the error correction mechanism in drives are called.
For others that want to know more about what TLER is...like I did:
https://www.smallnetbuilder.com/nas/nas-features/31202-should-you-use-tler-drives-in-your-raid-nas

Smartctl -a info on this drive:

Code:

=== START OF INFORMATION SECTION ===
Device Model:	 WDC WD80EMZZ-00TBGA0
Serial Number:	<snip>
LU WWN Device Id: 5 000cca 263c4b35c
Firmware Version: 83.H0A03
User Capacity:	8,001,563,222,016 bytes [8.00 TB]
Sector Sizes:	 512 bytes logical, 4096 bytes physical
Rotation Rate:	5400 rpm
Form Factor:	  3.5 inches
Device is:		Not in smartctl database [for details use: -P showall]
ATA Version is:   ACS-2, ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:	Thu May 10 00:35:07 2018 EDT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

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	 0x000b   100   100   016	Pre-fail  Always	   -	   0
  2 Throughput_Performance  0x0005   100   100   054	Pre-fail  Offline	  -	   0
  3 Spin_Up_Time			0x0007   100   100   024	Pre-fail  Always	   -	   0
  4 Start_Stop_Count		0x0012   100   100   000	Old_age   Always	   -	   5
  5 Reallocated_Sector_Ct   0x0033   100   100   005	Pre-fail  Always	   -	   0
  7 Seek_Error_Rate		 0x000b   100   100   067	Pre-fail  Always	   -	   0
  8 Seek_Time_Performance   0x0005   100   100   020	Pre-fail  Offline	  -	   0
  9 Power_On_Hours		  0x0012   100   100   000	Old_age   Always	   -	   0
 10 Spin_Retry_Count		0x0013   100   100   060	Pre-fail  Always	   -	   0
 12 Power_Cycle_Count	   0x0032   100   100   000	Old_age   Always	   -	   5
 22 Unknown_Attribute	   0x0023   100   100   025	Pre-fail  Always	   -	   100
192 Power-Off_Retract_Count 0x0032   100   100   000	Old_age   Always	   -	   5
193 Load_Cycle_Count		0x0012   100   100   000	Old_age   Always	   -	   5
194 Temperature_Celsius	 0x0002   216   216   000	Old_age   Always	   -	   30 (Min/Max 25/30)
196 Reallocated_Event_Count 0x0032   100   100   000	Old_age   Always	   -	   0
197 Current_Pending_Sector  0x0022   100   100   000	Old_age   Always	   -	   0
198 Offline_Uncorrectable   0x0008   100   100   000	Old_age   Offline	  -	   0
199 UDMA_CRC_Error_Count	0x000a   200   200   000	Old_age   Always	   -	   0

 

[Stux]

22

Congratulations :)

 

[rvassar]

Rotation Rate: 5400 rpm

22 Unknown_Attribute 0x0023 100 100 025 Pre-fail Always - 100

You seem to have a 5400 RPM Helium drive.

 

[rvassar]

Chasing this a bit more, I came across a discussion on Reddit regarding this drive.

https://www.reddit.com/r/DataHoarde...dence_that_the_wd80emaz_drives_found_in_some/


The speculation is it's a relabelled HGST He8, which opens up the possibility that it has the SATA 3.3 power disable feature. But your SMART output seems to indicate SATA 3.1, so likely not.

But for future reference, if you connect a late model drive to a 4-pin Molex to SATA power adapter and it fails to spin up...

https://www.hgst.com/sites/default/files/resources/HGST-Power-Disable-Pin-TB.pdf

 

[silversword]

But for future reference, if you connect a late model drive to a 4-pin Molex to SATA power adapter and it fails to spin up...

I did see that, and still need to actually finish pulling the drive out of the USB enclosure. Was a slightly different model number, so wasn't sure of the difference(s), and not using any Molex to SATA adapters in the current build :)

 

[silversword]

...and as a final note, it does have SCT :)


smartctl -l scterc /dev/da2
smartctl 6.6 2017-11-05 r4594 [FreeBSD 11.1-STABLE amd64] (local build)
Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org

SCT Error Recovery Control:
Read: 70 (7.0 seconds)
Write: 70 (7.0 seconds)