Drive Replace Time?

[Stravitch]

I have a Synology DS211j that I have put 2 x WD20EARS-00MVWB0 - 2 TB WD Green drives in Synology Hybrid RAID (SHR). They have close to 39000 hours on them now and I'm wondering if I should think about replacing them soon. I would like to avoid the unlikely event of losing my data so I'm trying to be proactive here. I see the MTBF is 1.2 million hours, but I feel wary of that generous of a time. Should I not worry?

 

If I were to replace them would I be better getting the WD40EFRX 4TB Reds or the ST4000VN000 4TB NAS drives?

[dalekphalm]

I have a Synology DS211j that I have put 2 x WD20EARS-00MVWB0 - 2 TB WD Green drives in Synology Hybrid RAID (SHR). They have close to 39000 hours on them now and I'm wondering if I should think about replacing them soon. I would like to avoid the unlikely event of losing my data so I'm trying to be proactive here. I see the MTBF is 1.2 million hours, but I feel wary of that generous of a time. Should I not worry?

 

If I were to replace them would I be better getting the WD40EFRX 4TB Reds or the ST4000VN000 4TB NAS drives?

I wouldn't worry about them dying. I would replace them:

1. When you want/need more storage, or

2. When one of them dies or starts to have errors

 

Personally I like the WD Red drives more than the Seagate drives, but honestly, you won't see much of a difference. Buy whichever one is cheaper.

[Stravitch]

After running the extended SMART test on both drives disk two came back with the following:

 

This just normal wear and tear/nothing to be too concerned about?

[wpirobotbuilder]

This just normal wear and tear/nothing to be too concerned about?

You're all good. If you're curious, the accepted answer here is useful for understanding what those numbers mean.

http://askubuntu.com/questions/20393/how-do-i-interpret-hdd-s-m-a-r-t-results

[Stravitch]

Amazing! Thank you for the link. It explains a lot. I guess I'm just paranoid after my previous NAS (ReadyNAS Duo) had both drives fail at the same time. Sent the drives off to see what it would cost to recover the data and it turns out it costs quite a lot.

 

I've set up weekly/monthly scanning and reporting now that I know that was a feature in Synology's DSM and will keep an eye on things. 

 

If I were to go by the MTBF of drives, does that mean that I should be more concerned that the NAS hardware will fail long before the drives will or are those numbers a gross exaggeration based on their ideal world lab test? 

[braneopbru]

WOW! Look at that Load Cycle Count !!

 

WD specifies that the Green drives will last to 300,000 load cycles. You are at 784,000+. That's over two and a half times what the drive is specified to last.

 

Yes, I would definitely get the data off of those drives ASAP, especially if they were purchased and installed at the same time. If they were subject to nearly identical use, I suspect that they are likely to both fail within short order of each other.

 

That is why you don't use Greens in RAID without disabling head parking. 

 

 

 

EDIT: MTBF numbers are useless. Literally. That 1.2 million hour rating would mean that a drive should last 137 years of usage......sure.

[Stravitch]

Both drives were installed around the same time. The first drive has even more LCC, closing in on 1 million.