topic Re: Spare size difference in ONTAP Hardware

Spare size difference

ronnielcs — Thu, 05 Jun 2025 05:51:10 GMT

Hey guys,

Per the spare disks listed below, can the second disk replace the first (mind the MB difference)?

partner 11b.1x.1x 10b 10 17 SA:A 0 SAS 15000 0/0 560208/1147307688

partner 11b.1x.1x 10b 10 16 SA:A 0 SAS 15000 0/0 560879/1148681096

Message was edited by: Ronnie Landman

Re: Spare size difference

peter_lehmann — Thu, 24 Oct 2013 13:05:10 GMT

Yes this is totally OK. One of the reasons for the "disk right sizing" being done by Storage Manufacturers.

No worries,

Peter

Re: Spare size difference

ronnielcs — Thu, 24 Oct 2013 13:26:36 GMT

Yes, I'm aware of the Right Sizing, however I couldn't find any detailed information on it. Does it cut all the disks raw sizes, or just the new ones added based on the lowest size factor?

Re: Spare size difference

peter_lehmann — Mon, 11 Nov 2013 07:16:09 GMT

Because the disk manufacturers are producing disks with diferent geometry, the Storage Companies need to find a way to work around this fact.

NetApp "right sizes" the disks to the lowest numbers of all disks they get (buy). I guess all the Storage Companies do some sort of right-sizing...

So, it does not depend on which disks you are adding to the system, they all are "right-sized" by ONTAP. I'm not aware of a table showing all the details, buit there is one in the "Storage Admin Guide" showing the "netto capacity" of all the disks available.

Hope this answers the question. Peter

Re: Spare size difference

HARI_KRISHNA981 — Mon, 11 Nov 2013 11:14:27 GMT

Hi Ronnie,

have a look at the thread and another URL given below, you may find an explanation for right sizing

https://communities.netapp.com/thread/8509

http://storagegaga.wordpress.com/tag/right-size/

Regards,

Hari