Duo (v1) with WD20EARS + WD20EARX

[Mothman1]

I have recently swapped out 2 x 500GB drives and replaced with 2 x 2TB drives as per subject line.
I have the opportunity to replace the EARS drive with a EARX drive so that they would be a matched pair. Both drives are second-hand and the EARS has a Load Cycle count >118000.

I used to get upload speeds of around 18MB/s with the 500GB config, now I only see 9MB/s. Is this a symptom of the drive mis-match or something else? I read of setting WDIDLE for these drives - how do I do this?

[mdgm-ntgr]

If you download your logs (Status > Logs > Download all logs) and extract the zip contents what does partition.log look like?

[Mothman1]

Thanks for the reply. This is what I get:
Disk /dev/hde doesn't contain a valid partition table

Disk /dev/hdc: 2000.3 GB, 2000388448256 bytes
255 heads, 63 sectors/track, 243200 cylinders, total 3907008688 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0x00000000

Device Boot Start End Blocks Id System
/dev/hdc1 2 4096001 2048000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/hdc2 4096002 4608001 256000 82 Linux swap / Solaris
Partition 2 does not end on cylinder boundary.
/dev/hdc3 4608002 3907008687 1951200343 5 Extended
/dev/hdc5 4608003 625105585 310248791+ 8e Linux LVM
/dev/hdc6 625105587 976736302 175815358 8e Linux LVM
/dev/hdc7 976736304 3906975919 1465119808 8e Linux LVM

Disk /dev/hde: 2000.3 GB, 2000388448256 bytes
255 heads, 63 sectors/track, 243200 cylinders, total 3907008688 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0x00000000

[mdgm-ntgr]

Backup your data, update to 4.1.7 or later and do a factory default (wipes all data, settings, everything). It should resolve your performance issue.