Thought id post my preclear times of my wd greens vs my new sv35's for 3tb 1gb per platter flavor.  Note both were raw from factory.  I assume the wd reds would be as fast as the greens for preclear.

 

SV35 3TB ST3000VX000

== Last Cycle's Pre Read Time  : 6:12:20 (134 MB/s)

== Last Cycle's Zeroing time  : 5:32:48 (150 MB/s)

== Last Cycle's Post Read Time : 15:16:11 (54 MB/s)

 

 

 

WD green 3TB WD30EZRX:

== Last Cycle's Pre Read Time  : 8:59:17 (92 MB/s)

== Last Cycle's Zeroing time  : 8:14:03 (101 MB/s)

== Last Cycle's Post Read Time : 20:51:12 (39 MB/s)

 

 

WD green 2TB WD20EZRX

== Last Cycle's Pre Read Time  : 5:39:34 (98 MB/s)

== Last Cycle's Zeroing time  : 5:16:10 (105 MB/s)

== Last Cycle's Post Read Time : 12:52:43 (43 MB/s)

 

 

OLD seagate 160gb multi platter ST3160023AS:

== Last Cycle's Pre Read Time  : 1:08:37 (38 MB/s)

== Last Cycle's Zeroing time  : 0:59:43 (44 MB/s)

== Last Cycle's Post Read Time : 2:17:58 (19 MB/s)

 

 

 

 

The WD Reds will significantly outperform the 3TB Green units ==> the Reds are 1TB/platter units;  the Greens are 750GB/platter units 

Hmm the WD30EZRX-00DC0B0 is a 1tb platter

The WD30EZRX-00MMMB0/00AZ6B0 is a 750gb platter

 

Mine is a 00MMMB0 

Hmm the WD30EZRX-00DC0B0 is a 1tb platter

The WD30EZRX-00MMMB0/00AZ6B0 is a 750gb platter

 

Mine is a 00MMMB0 

 

Hadn't realized WD was now using 1TB platters in the Greens ... but nevertheless, as you've noted, the one you used for your chart about was the older 750GB platter unit.

 

Irrelevant for me ... I only buy Reds these days 

These are the preclear results from my new WD Red 3TB drive. It's running through my Supermicro SASLP-MV8 card and was running alongside the array performing normal duties.

 

== invoked as: ./preclear_disk.sh /dev/sdd
==  WDC WD30EFRX-68AX9N0    WD-WCC1T0535979
== Disk /dev/sdd has been successfully precleared
== with a starting sector of 1 
== Ran 1 cycle
==
== Using :Read block size = 8225280 Bytes
== Last Cycle's Pre Read Time  : 8:14:44 (101 MB/s)
== Last Cycle's Zeroing time   : 7:23:23 (112 MB/s)
== Last Cycle's Post Read Time : 24:02:09 (34 MB/s)
== Last Cycle's Total Time     : 39:41:15