PSA: Western Digital Changed the drives in Elements Enclosures!

nickf1227

Member
Sep 23, 2015
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Hello All,
I ordered an "WD 10TB Elements Desktop Hard Drive - USB 3.0 - WDBWLG0100HBK-NESN" on Amazon last week. Inside is a Western Digital WD101EMAZ drive
Previously, I had ordered 2 more of these back in November from Amazon and I recieved two Western Digital WD100EMAZ drives

What is the difference you ask? The new SKU is not helium...
No word on whether or not this is SMR or CMR.

IMG_20200616_185012.jpg

Any idea how to test?
 

EffrafaxOfWug

Radioactive Member
Feb 12, 2015
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SMR drives tend to have larger caches (256MB vs. 64MB) and I've been told they report having TRIM/unmap support to the OS.

Alternatively you can just add it to a ZFS array and kick off a resilver... if you haven't posted back in 10 days we'll assume it's still rebuilding :D

Some preliminary reports on reddit here.
 
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nickf1227

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Sep 23, 2015
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backup# smartctl -a /dev/ada3
smartctl 7.1 2019-12-30 r5022 [FreeBSD 12.1-STABLE amd64] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Device Model: WDC WD101EMAZ-11G7DA0
Serial Number: VCG9SG4M
LU WWN Device Id: 5 000cca 0b0c46f64
Firmware Version: 81.00A81
User Capacity: 10,000,831,348,736 bytes [10.0 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 3.2, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Tue Jun 16 19:51:23 2020 EDT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled


I just started a ZFS Send/Receive, nothing jumps out as wildly bad or differant:

1592352942457.png
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1592352905273.png


EDIT: With it running a little bit longer, we can see disk latency is different. We see lower peaks but higher over all mean read latency. We actually are seeing LOWER write latency, however.
1592354249366.png
 

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JediAcolyte

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May 29, 2020
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I contacted WD tech support before I purchased 2 of these myself. They said that no 10TB drives were made with SMR.
 

cstang67

New Member
Jun 24, 2020
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I bought 3 8TB Easystore last week.
They went from WD80EMAZ (helium) To WD80EDAZ (air) as well..