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Detected increasing uncorrectable error count
I've been running WDC WD4000FYYZ-01ULB0 4TB disks in a RN516 for about three years now. Not so long ago I had the message "Detected high uncorrectable error count" on one of the disks. Hot swap and ...
When the count starts to rise, I replace the disk. I feel uncomfortable when the counts reach 50, so I replace before then. I agree that you should have a backup too, and it is always wise to make sure your backup is up to date before manipulating hard drives, Don't do scrubs (scheduled or otherwise) with the failing drive in place.
You can (should) get an RMA from western digital - but it will not be a new drive. It will be a recertified drive, and it might not be the same model. They shouldn't downgrade you though - you should get at least a 4 TB enterprise class drive in exchange.
But I'd replace it now, using the drive you have on hand (assuming it is new and either a NAS drive or an enterprise drive). Either keep the RMA'd replacement for a spare in the future, or use it in some other system.
i thought your WDC WD4000FYYZ is the 4tb RE hard drive
this is top of range wd enterprise grade although the recent gold series is higher end
red drives spin at 5xxx rpm and is just a green/blue drive with vibration control. you should use red pro, se or re to compliment your 516
cpu8088 wrote:
i thought your WDC WD4000FYYZ is the 4tb RE hard drive
red drives spin at 5xxx rpm and is just a green/blue drive with vibration control. you should use red pro, se or re to compliment your 516
I agree the WD4000FYYZ should work fine.
But the WDC Reds will also work well, there is no reason to dismiss them. They aren't as fast and the warranty isn't as long, but they run a lot cooler. The RN516 is usually limited by network anyway.
StephenB wrote:
cpu8088 wrote:i thought your WDC WD4000FYYZ is the 4tb RE hard drive
red drives spin at 5xxx rpm and is just a green/blue drive with vibration control. you should use red pro, se or re to compliment your 516
I agree the WD4000FYYZ should work fine.
But the WDC Reds will also work well, there is no reason to dismiss them. They aren't as fast and the warranty isn't as long, but they run a lot cooler. The RN516 is usually limited by network anyway.
Thank you both for your quick responses and advise! What I take from your answers is that it should be fine to continue using WD4000FYYZ. So then I will try to get the defect one replaced, (hopefully) with another WD4000FYYZ. With latest OS updates, we now have the option to preset the fan speed on the performance page to "Cool". This setting is now configured and it helps to keep the drives a bit cooler. At 2000 RPM, the drive temperature is steadily at 40 dgr C / 104 dgr F. Maybe the "Cool" setting wil help prolong the live span of the drives.
Note that Netgear on http://kb.netgear.com/app/answers/detail/a_id/20641/~/readynas-hard-disk-compatibility-list?cid=wmt_netgear_organic states:
"Because you trust ReadyNAS to protect your data, we only list drives that have passed stringent disk qualification tests. Furthermore, if you are using ReadyNAS in a business-critical environment, we strongly recommend drives with a Rotation Vibration Safeguard feature for providing an extra layer of protection from premature drive failure. These drives generally include 5-year warranties, which matches the 5-year warranty on your business-class ReadyNAS device."Meanwhile, after 16 hours the hot swap and resync were succesful and the volume is healthy again.
Thu Jul 7 2016 9:47:50 Volume: Volume data health changed from Degraded to Redundant. Thu Jul 7 2016 9:47:49 Volume: Volume data is resynced. Thu Jul 7 2016 8:36:11 System: Antivirus scanner definition file was updated to 201607070427. Thu Jul 7 2016 1:00:22 Volume: Volume data is Degraded. .... Wed Jul 6 2016 17:59:06 Volume: Resyncing started for Volume data. Wed Jul 6 2016 17:58:55 Disk: Disk Model:WDC WD4000FYYZ-01UL1B2 Serial:WD-WCC136yyyyyy was added to Channel 5 of the head unit. Wed Jul 6 2016 17:56:44 Volume: Volume data health changed from Redundant to Degraded. Wed Jul 6 2016 17:56:42 Disk: Disk Model:WDC WD4000FYYZ-01UL1B0 Serial:WD-WCC1307xxxxx was removed from Channel 5 of the head unit.
Who can explain the difference between B0 and B2 at the end of the drive type number?
WDC WD4000FYYZ-01UL1B2
WDC WD4000FYYZ-01UL1B0
dsnpevl wrote:
Note that Netgear on http://kb.netgear.com/app/answers/detail/a_id/20641/~/readynas-hard-disk-compatibility-list?cid=wmt_netgear_organic states:
"Because you trust ReadyNAS to protect your data, we only list drives that have passed stringent disk qualification tests. Furthermore, if you are using ReadyNAS in a business-critical environment, we strongly recommend drives with a Rotation Vibration Safeguard feature for providing an extra layer of protection from premature drive failure. These drives generally include 5-year warranties, which matches the 5-year warranty on your business-class ReadyNAS device."Well, I always recommend either NAS-purposed drives or enterprise-class (and not desktop drives). All of those have some methods for either dealing with vibration. I don't recommend desktop drives, even if they are on the HCL.
The HCL isn't always up to date on new drive models, which has been a problem for years.
dsnpevl wrote:
WDC WD4000FYYZ-01UL1B2
WDC WD4000FYYZ-01UL1B0
Likely only WDC knows for certain what's coded into the stuff after the -. I'm sure they slip in production changes over time.
StephenB wrote:Likely only WDC knows for certain what's coded into the stuff after the -. I'm sure they slip in production changes over time.
Indeed. Asked about it on the WD forum:
https://community.wd.com/t/differences-between-wd4000fyyz-01ul1b2-and-wd4000fyyz-01ul1b0/170201
and got this answer and this link:
"Those drives are the same. The numbers after the "-" are for WD internal use.
Take a look at this link. maybe this could help. http://www.wdc.com/wdproducts/library/other/2579-001028.pdf
"
where it states:
"Model Number Suffix
The model number suffix (characters to the right of the dash following
the model number) is only for in-house use."
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