2TB WD20EARS HCL Advanced Format 4k Sectors TLER LCC WDidle3

claykin wrote:
Too bad you didn't read the following thread before purchasing WD20EARS disks. viewtopic.php?f=24&t=39737 Can you return them to your reseller?

I actually spoke with Netgear directly about the WD20EARS and was told that the drive would be ok
I especially spoke to netgear about the 4k cluster size and about possible mis-alignment problems in regards to WD's new Advanced Formating and they said no problem....

I'm not so sure as I'm only getting 22MB/s writes (8Gb file copy) with jumbo frames on Giga LAN through a netgear GS108 but I do get 75MB/s reads for a 8GB file copy over CIFS while running XRaid2 dual redundancy.

The LCC was going to be the issue long term as Western Digital states 1 Million cycles life when currently i am projecting 2-3 years for the drives as its looking like over 300,000 per year guaranteed.

Unfortunatly the spec page from WD state otherwise.
http://www.wdc.com/wdproducts/library/SpecSheet/ENG/2879-701229.pdf
Load/unload cycles 300,000
Does this actually=LCC ?

http://www.wdc.com/en/products/products.asp?DriveID=773


I also read somewhere that the WD20EARS does have TLER (time limed error recovery) which was in contrast to wiki, but wiki is not always right.

In reply to PM

MrCyberdude wrote:

Hard to answer right now as I'm still migrating 6Tb of data across from one NAS to the readynaspro. Hostname: ReadyNasPro Model: ReadyNAS Pro Pioneer Edition [X-RAID2] Serial: 1YA59CR?x?x?x Firmware: RAIDiator 4.2.9 Memory: 1024 MB [4-5-5-15 DDR2] IP address 1: 192.168.1.111 IP address 2: Not Connected Volume C: Online, X-RAID2, 6 disks, 85% of 7413 GB used I am running 6 x WD20EARS with jumbo frames and the jumbo does make a difference. and they seem steady for the moment, I do feel that the RNPP does need a ram upgrade. Thats next. I'm feeling that running XRaid2 with 2 x redundancy might be significantly slower than single redundancy. I didn't really research as I needed double redundancy and that was that as my budget was limited.... Hmmmm its hard to say limited budget and $3400 in the same breath, but u get what i mean. RNPP 8 x WD20EARS HDD With Win7 and netgear GS108 Jumbo and using CIFS, I'm getting around 25 MB/s for files less than a gig so I'm thinking its memory related. Because copying a 7.79 GB (8,370,782,376 bytes) file to the NAS takes 6:20 secs or 20.5 MB/s and 1:55 secs from the NAS to the Win7 PC so 67.7 MB/sec 20.5 MB/s to NAS 67.7 MB/s from NAS ======================= SMART Information for Disk 1 Model: WDC WD20EARS-00S8B1 Serial: WD-WCAVY258?x?x? Firmware: 80.00A80 SMART Attribute Raw Read Error Rate 0 Spin Up Time 8691 Start Stop Count 21 Reallocated Sector Count 0 Seek Error Rate 0 Power On Hours 252 Spin Retry Count 0 Calibration Retry Count 0 Power Cycle Count 19 Power-Off Retract Count 13 Load Cycle Count 9313 Temperature Celsius 40 Reallocated Event Count 0 Current Pending Sector 0 Offline Uncorrectable 0 UDMA CRC Error Count 0 Multi Zone Error Rate 0 ATA Error Count 0 =======================

actually did the copy again when my system wasn't doing other tasks and got
copying a 7.79 GB (8,370,782,376 bytes) file to the NAS took 5:55 secs or ~=22 MB/s

and 1:40 secs from the NAS to the Win7 PC so 77.9MB/sec i.e.~=7790MB/100secs

22.0 MB/s write to NAS
77.9 MB/s read from NAS