My TeraStation Live HS-DHTGL/R5 came with four 500GB drives. According to the "Disk Information" page on the web interface, these are Samsung model HD501LJ drives (465.76 GB ea.). So I went to the Samsung web site and downloaded the spec sheet. These drives have 12V spin-up requirement of 2.4A.
The TeraStation Live HS-DHTGL/R5 User Manual says on page 83 not to use replacement drives with a specified current load that exceeds 0.92A at 5 VDC and 0.9A at 12 VDC. This has to be a mis-print because the drives they supplied with the unit require 2.4A and they've been working fine until now.
I decided to compare specs between the original Samsung HD501LJ drive with Western Digital drives. The newer WD Red 1TB WD10EFRX and 2TB WD20EFRX both fall well below the power requirements of the original drive.
Excerpts from spec sheets:
Western Digital Samsung
Power Management
WD20EFRX WD10EFRX HD501LJ
12VDC ±10% (A, peak) 1.73 1.20 2.4
5VDC ±10% (A, peak) - -
Average power requirements (W)
WD20EFRX WD10EFRX HD501LJ
Read/Write 4.1 3.3 8.0
Idle 2.7 2.3 8.2
Standby/Sleep 0.4 0.4 0.7/1.2
In light of this new information I plan on replacing my old, failing 500GB drives with the WD Red 2TB WD20EFRX.
Does anyone see a problem with this?