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Forum Discussion
gogoguy
Nov 17, 2025Aspirant
Drive replacement for failed drive
Hello everyone
I've been running a ReadyNAS RNDU4000 (Ultra 4) populated with 4 x ST4000VN000 4TB drives in a RAID 5 configuration giving me 10.9TB available volume space for many years now. I've also upgraded the device to run on OS6 (currently 6.9.3).
I've had a single drive failure and was looking at what I could replace it with. The ST4000VN000 are no longer available and was looking at the current Seagate IronWolf 4TB drives. The one that looked promising was the ST4000VN006 but it runs at 5400rpm which differs from the 5900rpm my current drives are. Would this be a problem? I use my NAS for music streaming and media playback.
Has anyone used these drives or better still replaced a ST4000VN000 with one?
Anyone got any further suggestions on drive replacement as I cannot find a drive compatibility chart anywhere any more especially for upgraded NAS devices on OS6.
Many thanks
2 Replies
- StephenBGuru - Experienced User
gogoguy wrote:
The ST4000VN000 are no longer available and was looking at the current Seagate IronWolf 4TB drives. The one that looked promising was the ST4000VN006 but it runs at 5400rpm which differs from the 5900rpm my current drives are. Would this be a problem?
No, it would not be a problem.
But if you prefer, you could substitute the 4 TB IronWolf Pro (about $30 USD more in the US). That runs at 7200 rpm.
gogoguy wrote:
as I cannot find a drive compatibility chart anywhere
Netgear exited the NAS business some years ago. Your Ultra was discontinued back in 2013, so the HCL hasn't been updated for years. The newest OS-6 hardware was released in 2017, so the HCL for those products is also very stale.
Generally any NAS-purposed or enterprise-class SATA drive is compatible.
- gogoguyAspirant
Thank you Stephen for you r reply. I will get the Pro.
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