Preclearing 3 TB disks

[dikkiedirk]

I guess more and more people will use 3 TB in their server. I like to know your experiences with preclearing this drives. How long does it take? What system? Are there any benchmarks yet. Just for comparison.

 

I plan on getting some of these when price drops: Hitachi HDS723030ALA640. They are 7200 rpm, 3 TB.

[grither]

Ive precleared afew...time ranges from 30 hours to fifty for one that i just finished yesterday

[Johnm]

my 7200 3TB hitachis took about 32 hours.

my 5400 3TB hitachis took about 38 hours.

 

this will slightly change based on your cpu and amount of ram.

[LeSamourai72]

I know the OP was asking about Hitachi's, but it took around 106 hours for a 3 cycle preclear on a pair of 3TB 5400 Western Digital drives (WD30EZRX) on a dell optiplex 745 with a Core 2 Duo (E6300 1.8 GHz, 4GB RAM) that I had lying around (just using it as a preclear machine running 5.0b14 free version). 

 

 

FWIW, I just had gotten my 4.7 unRaid put together (based on Raj's 12 drive budget build) with 8-2TBs (only transferred some BD iso's as a test to stream to my PCH A300, nothing major yet), but I came across some 3TB drives and really want to use them, so may just do 5.0b14 from the get go, but that's another story ...

[LeSamourai72]

... one more WD 3TB (WD30EZRS-11J99B1) 3 cycle preclear for comparison on the same system as previously posted (note: only 1 drive preclearing this time):

 

Preclear Successful

... Total time 93:56:08

... Pre-Read time 9:17:50 (89 MB/s)

... Zeroing time 8:57:35 (93 MB/s)

... Post-Read time 19:05:19 (43 MB/s)