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WD Red NAS Drives Query

UKTH forums 💻 Computers 🗨 Servers Et al WD Red NAS Drives Query

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  • #19111
    Avatarkev2021
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    Hi all,

    So I have a spare WD Red 4TB HD  – WD40EFRX and I understand these have been replaced with WD Red Pro 4TB – WD40EFZX.

    My question is, will I be able to use these together in the same RAID 5 setup?  Reason I ask is from what I can tell, the original EFRX had 64mb cache whereas the new EFZX has 128mb cache and is apparently slightly faster than the older version.

    I am ignoring the SMR drives as these have reports of suffering from poor performance so sticking to cmr drives.

    Thanks

    Kev

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    #19112
    UK SentinelUK Sentinel
    Moderator
    • Replies 7,859
    • The Skipper

    Mixing the two simular drives should not be an issue, you will loose the benefits of the the extra cache and the increase in 150 to 170 MB/s write speed of the new disk.

     

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    #19120
    Avatarkev2021
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    Thanks, Upon reading it worked in a mirror raid, I figured no reason it wouldn’t work in a raid 5 so ordered then.  They arrived today,  I’ve added them and also created new volume on nas.  It’s currently doing parity check of the new volume so will leave that as it will take several hours so will look at moving data to it probably tomorrow evening or the weekend :)  Basically setting up a new volume to hold backups of data I store locally on the PC as well as to re-locate some stuff from the 1st volume onto the 2nd volume to free up a bit more space on the first volume as its currently approx 75% full.

    Kev

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    #19121
    UK SentinelUK Sentinel
    Moderator
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    • The Skipper

    Nice

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    #19127
    UK SentinelUK Sentinel
    Moderator
    • Replies 7,859
    • The Skipper

    I’ve added them and also created new volume on nas.  It’s currently doing parity check of the new volume so will leave that as it will take several hours so will look at moving data to it probably tomorrow evening or the weekend :)

    Is the new ‘WD Red Pro 4TB – WD40EFZX’ disk still working well in the mixed disk RAID 5 configuration, any noticeable performance issues ?

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    #21912
    Avatarkev2021
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    Hi,

    Apologies, looks like I missed your reply and was just looking at this thread.

    So to recap, I setup the new drives in a new volume on the NAS and it consists of 2 x WD40EFZX and 1 x WD40EFRX drive and so far, no issues.  No errors on the drives, all seems ok.

    However, I have just received a report advising of : Drive reconnection count: 1 for one of my WD40ERFX drives in the first volume (all drives are the same except for the last part, the drive reporting reconnection count: 1 is a 68WT0N0 whereas the others are 68N32N0.

    I’ve started a extended smart test of the drive but the initial indication is it will take approx. 10hrs to complete so I’ll look at it tomorrow and see what it says.

    upon looking online, some say run extended smart test, if number goes up, replace the drive, if it doesn’t basically don’t worry too much about it.  Alternative suggestion is replace the drive, if get a count again on replace drive, it is likely not the drive but the nas itself.

    So going to see what the smart test says and then decided do I want to buy anther drive or not… plus I need to find the right ones again :)

    Not noticed any real difference in performance but then this error was only reported today so will have to wait and see.

    On previous nas I had this error on a different drive bay and i replaced and that’s been fine (when i got new nas, I put the drives in same order) and still no issues.

    Only thing happened to NAS recently is a update in the software to a new version (new gui etc) so bit of a bigish update and someone else reported a error with a drive after the update of nas so coincidence? not sure.

    Time will tell.

    Kev

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    #21924
    Avatarkev2021
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    • Forum Addict

    Hi,

    So extended smart array test completed on the drive and it says its healthy and still only shows 1 which when i look into details, the Drive reconnected count:1 looks to mean UDMA_CRC_Error_Count: 1

    So after a extended test on the drive, it still only shows 1… so not too sure what to do for the best now.  Should I replace the drive, best to be safe than sorry, albeit the drive is part of a RAID 5 so all data is safe if the drive fails *but* concern is what if another drive reports a issue? will the issue with this drive then cause a issue/problem when rebuilding the array? I’m tempted to buy a drive but also don’t want to waste the money if no reason to.

    Thanks

    Kev

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    #21925
    Avatarkev2021
    • Replies 1,136
    • Forum Addict

    Also, this drive has the most power on hours of 53,759.

    Other drives have a mix, some are 41.9,k 22.2k, 41.8k, 4.1k hours… Will have to check if there is a max number of hours, maybe that’s what’s causing it to flag up? but I’ve had other drives years without issues.. one drive I replaced about a year ago and that was over 10 years old… No issues with it, just decided I’m probably chancing my arm now.

    Kev

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    #21926
    Avatarkev2021
    • Replies 1,136
    • Forum Addict

    Just looking at the drives… it seems I have the below:-

    Volume 1 RAID 5 consists of:-

    WD40EFRX

    Volume 2 RAID 5 consists of:

    WD40EFZX and 1 WD40EFRX

     

    So now I’m wondering… do I buy a WD40EFZX drive, pull out the WD40EFRX from Volume 2, put the new drive in place of that making Volume 2 all WD40EFzx drives and then once that volume has rebuilt, remove the drive reporting a issue and replace with the WD40EFRX making volume 1 all the same models too?

     

    bit more work and probably best part of a week to do as it will take probably 2 days or so to do the rebuild…

    Kev

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    #21927
    Avatarkev2021
    • Replies 1,136
    • Forum Addict

    Just ordered a replacement, guess better to be safe than sorry, just now to decide do i replace the different one in vol 2 with new drive to make the same and then once that’s rebuilt, replace the faulty one in vol 1 with the drive of same type or just replace the faulty one in vol 1 with this one as can’t buy the old model ones now anyway so potentially they will be replaced with newer ones over time..

    Kev

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    #21928
    UK SentinelUK Sentinel
    Moderator
    • Replies 7,859
    • The Skipper

    Like you originally, I still feel that the maybe faulty drive should still work but will be interesting to see when the replacement arrives ?

    HDD are fairly robust as is Hardware RAID 5.

    FYI: CRC error count is just an indicator for where there is a communication problem between the controller and the drive, so worth checking cables and ports etc. the error counter is never reset during the lifetime of the drive. As long as the counter isn’t increasing, then you’re fine I believe. (been a while it has since I was involved with this type of kit)

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    #21929
    Avatarkev2021
    • Replies 1,136
    • Forum Addict

    Thanks, with the NAS I have, there is no need to open the case etc to fit the drive, I simply pull the HD caddy out (for want of a better work) and then slide it back in and that’s it.  There is a board at the back which the drive connects to hence making the connection so no cables/connectors to manually connect.

    I read that it means bad sectors found and could be signs of the drive starting to fail.  As said had this once on my previous NAS (had it for around 6 years) and only changed it as was out of warranty and manufacturer stopped support for it but has been a good unit.  Had 1 power issue with it and they simply sent me a replacement to fit myself, easily done.  Other than that I’ve had 1 of these errors before on bay 3 and I replaced the drive and all was fine, no further errors. So hence ordered a replacement as suspect error will go away once replaced.  I did used to have a spare but I think when I setup second volume as I hadn’t needed to replace any drives, I used it as part of the 2nd volume as also reduced cost of buying the drives as I had 1 already but has left me with no spare to swap out if issues arise.

    Again, will be in same boat now one this one arrives and is replaced but can look to get one a bit later as a spare, although maybe they will replace this model with something else.

    Kev

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    #21930
    UK SentinelUK Sentinel
    Moderator
    • Replies 7,859
    • The Skipper

    I always thought ‘UDMA_CRC errors’ are a connection / connector type problem, not a disk problem?

    either way, new disk should give us a clue ;)

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    #21932
    Avatarkev2021
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    From what I read, it could be either.  As said last time, I changed the disk and no more errors since and that was in prob 2018 or 2019.

    Kev

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    #21934
    UK SentinelUK Sentinel
    Moderator
    • Replies 7,859
    • The Skipper

    From what I read, it could be either.  As said last time, I changed the disk and no more errors since and that was in prob 2018 or 2019.

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    In a completely sane world, madness is the only freedom (J.G.Ballard).

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