I was asked to post a "how to" regarding WDIDLE3 and WDTLER in a PM and figured I would post it for all.
I would be glad to help. I believe you are in luck with the firmware that you have. I have 5 of the WD20EADS drives with this firmware. Four of them have required no WDTLER or WDIDLE3 fixes. Have you put these in your RN yet and monitored SMART status? Look particularly at Load Cycle Count (LCCs) escalation. I am at work right now but from the top of my head this is what I did.
1. Searched for WDTLER and WDIDLE3 fixes which are DOS apps.
2. Made a bootable DOS disk with both of these on it.
3. Connected the WD drive while still in caddy to old Windoze IDE motherboard using a IDE to SATA adapter that I got from Amazon for about $10. If you have a Windoze computer with a SATA connector you do not need this.
Here is a great link that I essentially followed.http://forum.synology.com/enu/viewtopic
Hope this helps.
Product: ReadyNAS Pro Pioneer 4 GB from NASHQ.com (2 GB X2 Modules) 3968 MB [4-5-5-18 DDR2]
RAIDiator Version: RAIDiator-x86 Version: 4.2.21 with Teaming Add on disabled
RAID Info: RAID Level X-RAID2, 6 disks
Hard Disk Brand, Model & Capacity: Western Digital FIVE-WD20EADS-00R6B0 TLER ON & WDIDLE /D
Hard Disk Brand, Model & Capacity: Western Digital ONE-WD2003FYYS
ReadyNAS Security Mode: User
No. Hard Disk currently installed: 6
USB Drive Attached: LaCie Rugged Hard Disk FireWire 400 & 800 | Hi-Speed USB 2.0 500GB formatted EXT3
Network Router/Switch Info: Airport Extreme Dual Channel, Netgear GS608 Gigabit Switches X4, Apple Time Capsule 1 TB Dual Channel
UPS: APC Back-UPS RS 1500 LCD
Computers:MBPx3 using Lion 10.7.4, iMac G4 using Tiger, OLD Windoze XP Dell, Mac Mini Server as HTPC using Plex and Harmony 900 Remote and Monoprice HDMI adapter. Apple TV 1G and Apple TV 2Gx2 jail broken and using Plex Client , iPhone 3Gx2, iPhone4x2 and iPad that I use as remotes to Plex and Apple TV. The iPad 3 recently used as remote to ATV2 and streaming from RNPP.
Direct TV HR2xs, HR10s zippered for MRV