"NAS-Drives" vs. "Surveillance-Drives"?

[ninjapants]

Can someone explain to me why the Seagate IronWolf 4TB drive which is sold as a NAS drive has 5900rpm and costs 150€ (where I live at least) and the Seagate Seahawk drive, which is sold as a surveillance drive but has 7200rpm for 140€ and otherwise has the exact same specs (as far as I can see).

 

So I am obiously confused now. Why would I buy the NAS drive if I get a better price/performance ratio with the surveillance drive? There must be a reasonable explanation for this pricing.

[Electronics Wizardy]

They have firmware that makes it so raid cards like them. 

 

In a normal drive, if you have a bad block, it will slow to try to read it. The raid card thinks its dead, and will drop it from the array.

 

In a nas/raid drive, it will just skip the bad chunk after a second or 2.

 

Also in a nas, the drive speed doesn't really matter as your normally limited by the network. These are for slow home nas, not enterprise san's.

[Simon771]

For a normal consumer there won't be big difference.

5900rpm might not seem much, but it will still dilver you 100MB/s transfer speed, which is more than enough for NAS devices

[ninjapants]

16 minutes ago, Electronics Wizardy said:

They have firmware that makes it so raid cards like them. 

 

In a normal drive, if you have a bad block, it will slow to try to read it. The raid card thinks its dead, and will drop it from the array.

 

In a nas/raid drive, it will just skip the bad chunk after a second or 2.

 

Also in a nas, the drive speed doesn't really matter as your normally limited by the network. These are for slow home nas, not enterprise san's.

 

3 minutes ago, Simon771 said:

For a normal consumer there won't be big difference.

5900rpm might not seem much, but it will still dilver you 100MB/s transfer speed, which is more than enough for NAS devices

Thanks for the explanation!

[SCHISCHKA]

surveillance drives are optimised for 24/7 writing from a streaming input (camera). My understanding with surveillance it doesn't matter if there are errors in writing, the drive won't go back and check or correct it will just keep writing. Storage drives however are expected to read and write all over the platter. Both will be made for 24 hour operation, just optimised for different purpose. Many people put the surveillance drives in their TV tuner/Freeview boxes. I would buy the one made for the purpose and you can judge the shit ones by the shorter warranty period.

[ninjapants]

13 hours ago, SCHISCHKA said:

surveillance drives are optimised for 24/7 writing from a streaming input (camera). My understanding with surveillance it doesn't matter if there are errors in writing, the drive won't go back and check or correct it will just keep writing. Storage drives however are expected to read and write all over the platter. Both will be made for 24 hour operation, just optimised for different purpose. Many people put the surveillance drives in their TV tuner/Freeview boxes. I would buy the one made for the purpose and you can judge the shit ones by the shorter warranty period.

Isn't error correction behaviour not governed by the OS? In case of Seagate both Surveillance and NAS drives have 3 years of warranty, so you still think I should get the pricier NAS version?

[SCHISCHKA]

7 minutes ago, ninjapants said:

Isn't error correction behaviour not governed by the OS? In case of Seagate both Surveillance and NAS drives have 3 years of warranty, so you still think I should get the pricier NAS version?

WD red NAS drives have 5 year warranty, thats why I chose them. Error correct can be done with filesystems like what ZFS does but drives do them in the firmware at a much lower level for things like errors from the reading head. Use a NAS drive for NAS and use a surveillance drive for CCTV or media recording

[ninjapants]

5 minutes ago, SCHISCHKA said:

WD red NAS drives have 5 year warranty, thats why I chose them. Error correct can be done with filesystems like what ZFS does but drives do them in the firmware at a much lower level for things like errors from the reading head. Use a NAS drive for NAS and use a surveillance drive for CCTV or media recording

K. will do, thanks!

[brwainer]

1 hour ago, SCHISCHKA said:

WD red NAS drives have 5 year warranty, thats why I chose them. Error correct can be done with filesystems like what ZFS does but drives do them in the firmware at a much lower level for things like errors from the reading head. Use a NAS drive for NAS and use a surveillance drive for CCTV or media recording

WD Red have a 3 year warranty. WD Red Pro, which are also 7200RPM, have a 5 year warranty.

[SCHISCHKA]

3 minutes ago, brwainer said:

WD Red have a 3 year warranty. WD Red Pro, which are also 7200RPM, have a 5 year warranty.

correct