topic Re: How the DDP Data Write? in EF & E-Series, SANtricity, and Related Plug-ins

How the DDP Data Write?

unitech89e9 — Wed, 04 Jun 2025 10:06:55 GMT

Any document is talking about DDP Data write ?

DDP is very like Seagate ADAPT,

ADAPT write data always write into 10 drive,and every drive will write 512KB Page,and this 10 drive's 512KB page will be a 4MB space

How about DDP ?

Re: How the DDP Data Write?

elementx — Wed, 22 Dec 2021 13:45:03 GMT

https://www.netapp.com/media/12421-tr4652.pdf - D-Stripe size

Re: How the DDP Data Write?

unitech89e9 — Thu, 23 Dec 2021 00:17:48 GMT

This document just say how the d-stripe layout,

but don't say how the data been write into the drive,

The D-Stripe is use to allocate the space,

but I believe the data write will not use all the d-stripe,

because application is not always write 4GB data into drive every time!

Re: How the DDP Data Write?

elementx — Thu, 23 Dec 2021 13:59:36 GMT

Regardless, writes are always in D-stripes.

But if you want to ask a different question - what happens with writes smaller than D-stripes capacity - please wait a bit until someone from the E-Series team or other person knowledgeable about that detail sees this thread. It may take some time as many folks are already vacationing.

Re: How the DDP Data Write?

MitchBlackburn — Tue, 04 Jan 2022 14:14:10 GMT

Please use link below to find more information.
SANtricity OS Dynamic Disk Pools - Feature Description and Best Practices | TR-4652 | NetApp

-Mitch