Qnap 439 Pro II and WD20EARS

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hispanico
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Qnap 439 Pro II and WD20EARS

Post by hispanico » Sat Jul 17, 2010 4:24 pm

I buy a new Qnap 439 Pro II and i must select 4 HD.... and i wolud like take n.4 WD20EARS

http://www.wdc.com/it/products/products.asp?driveid=773

It's correct like selection and the compatibility is OK ??

Thank for yor advise
Hispanico

Uffe
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Re: Qnap 439 Pro II and WD20EARS

Post by Uffe » Sat Jul 17, 2010 7:47 pm

Hi Hispanico,

I am considering buying the exact same setup.
The QNAP compatibility page (http://www.qnap.com/pro_compatibility.asp) says that these drives work in the TS-439 Pro II, but that you need to upgrade the NAS firmware to at least v3.2.5.
The latest firmware (currently v3.3.0) for the 439 Pro II is available at http://www.qnap.com/download_detail.asp?pl=1&p_mn=148&ct_name=Latest.

Please note that I haven't tested this myself of course.

Cheers,

/Uffe

hispanico
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Re: Qnap 439 Pro II and WD20EARS

Post by hispanico » Sat Jul 17, 2010 10:59 pm

Some use it QNap with these hd ??

Tk for your information

hispanico
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Re: Qnap 439 Pro II and WD20EARS

Post by hispanico » Mon Jul 19, 2010 3:39 pm

...No suggestions or information ??

Thank

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schumaku
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Re: Qnap 439 Pro II and WD20EARS

Post by schumaku » Mon Jul 19, 2010 6:20 pm

Stronlgy suggest staying away from the WDC Green Desktop drives. These might work, as long as no errors occur. The situation about enabling TLER (require to limit in-depth error correction to a max. of seven seconds) is unclear and might or might no longer work on newer manufacturing lots. Finally yet importantly, WD does _not_ support using these drives in RAID systems at all, and the utility required is no longer available from WD anymore. That says it all.

While some production series are in the compatibility list, QNAP does not give a clear statement on TLER in the compatibility table. Personally, I am convinced they experienced no issues with the in-depth error correction (unlikely with factory new drives...) during the compatibility tests.

Regards,
-Kurt.

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schumaku
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Re: Qnap 439 Pro II and WD20EARS

Post by schumaku » Mon Jul 19, 2010 6:38 pm

Stronlgy suggest staying away from the WDC Green Desktop drives. These might work, as long as no errors occur. The situation about enabling TLER (require to limit in-depth error correction to a max. of seven seconds) is unclear and might or might no longer work on newer manufacturing lots. Finally yet importantly, WD does _not_ support using these drives in RAID systems at all, and the utility required is no longer available from WD anymore. That says it all.

While some production series are in the compatibility list, QNAP does not give a clear statement on TLER in the compatibility table. Personally, I am convinced they experienced no issues with the in-depth error correction (unlikely with factory new drives...) during the compatibility tests.

Worth reaading: HDClown form entry here: viewtopic.php?f=182&t=31785#p139674 (one detail: Yes, mdadm does not take care about HDD timeouts - it will simply kick the disk out of the raid if it not responding anymore)

Regards,
-Kurt.

dcouzin
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Re: Qnap 439 Pro II and WD20EARS

Post by dcouzin » Tue Jul 20, 2010 12:49 pm

schumaku, perhaps you can answer two questions from an opposite direction.
Suppose one wished to disable the TLER (7 second error correction limitation) on a WD RE4 drive. Running the old TLER-OFF.BAT could do this on older WD Enterprise drives.
Question 1: does that WDTLER utility still work for the latest RE4 drives?
Question 2: if TLER is disabled does the RE4 then perform unlimited error recovery like a typical non-Enterprise drive?
Thanks.

trueimage
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Re: Qnap 439 Pro II and WD20EARS

Post by trueimage » Wed Jul 21, 2010 11:54 am

I have this NAS and these disks in RAID5

My SMART info shows:

ID Description Value Worst Value Threshold Raw value Status
1 Raw_Read_Error_Rate 200 200 051 0 OK
3 Spin_Up_Time 149 149 021 9525 OK
4 Start_Stop_Count 100 100 000 103 OK
5 Reallocated_Sector_Ct 200 200 140 0 OK
7 Seek_Error_Rate 200 200 000 0 OK
9 Power_On_Hours 099 099 000 753 OK
10 Spin_Retry_Count 100 100 000 0 OK
11 Calibration_Retry_Count 100 253 000 0 OK
12 Power_Cycle_Count 100 100 000 10 OK
192 Power-Off_Retract_Count 200 200 000 7 OK
193 Load_Cycle_Count 196 196 000 14343 OK
194 Temperature_Celsius 116 111 000 36 OK
196 Reallocated_Event_Count 200 200 000 0 OK
197 Current_Pending_Sector 200 200 000 0 OK
198 Offline_Uncorrectable 200 200 000 0 OK
199 UDMA_CRC_Error_Count 200 200 000 0 OK
200 Multi_Zone_Error_Rate 200 200 000 0 OK

So the LCC is just over 19 per hour.

not sure if the others are a problem.

By my calcs, if the drive is rated to 300,000 LCC then it will take 300,000 - 14,343 = 285,657 / 19 =~ 15,000 hours or ~ 1.7 years. And some people say they work up to 1,000,000 LCC so that is about 1.7 x 3.3 = 5.6 years

either way I'm not terribly worried... or not enough to spend 2-3x the price for the enterprise drives. I have 2 year in-store instant replacment on these drives too.
TS-651 x86 8GB RAM
FW 4.3.3.0188

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